Lessee, Operating Lease, Liability, Payment, Due [Abstract] Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Cover [Abstract] Cover [Abstract] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Net increase (decrease) in cash and cash equivalents and cash held in escrows Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Lessee, Operating Lease, Liability, Maturity Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Sales-type lease revenue Sales-type Lease, Revenue Trading Symbol Trading Symbol MYLTIP 2021 MYLTIP Two Thousand Twenty One [Member] MYLTIPS Two Thousand Twenty One Ownership Percentage Equity Method Investment, Ownership Percentage Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Debt Instrument, Alternate Basis Spread on Variable Rate Debt Instrument, Alternate Basis Spread on Variable Rate Debt Instrument, Alternate Basis Spread on Variable Rate Cash Flow Hedge Derivative Instrument Liabilities at Fair Value Cash Flow Hedge Derivative Instrument Liabilities at Fair Value Additional Rental Payment Additional Rental Payment [Member] Additional Rental Payment, excluding base rental payment Non-NEOs Non-NEOs [Member] Long-Term Debt, Term Long-Term Debt, Term Non-Real Estate Investments Non-Real Estate Investments [Policy Text Block] Non-Real Estate Investments Rental Expenses: Residential Rental Expenses Residential Rental Expenses Residential. Company's Taxable Income Distribution Company's Taxable Income Distribution Company's Taxable Income Distribution Loans and Leases Receivable, Loans in Process Loans and Leases Receivable, Loans in Process At Market Stock Offering Program Maximum Length Of Sale (in years) At Market Stock Offering Program Maximum Length Of Sale (in years) At Market Stock Offering Program Maximum Length Of Sale (in years) Net Rentable Area (in sf) Net Rentable Area Line of Credit Facility [Table] Line of Credit Facility [Table] Cash FDIC Insured Limit Cash FDIC Insured Limit Cash FDIC Insured Limit Tenant and other receivables, net Increase (Decrease) in Accounts Receivable Earnings Per Share and Earnings Per Common Unit Earnings Per Share, Policy [Policy Text Block] Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Restriction on redemption of OP Unit to Common Stock (in years) Restriction On Redemption Restriction on redemption of OP unit to Common Stock Conversion of redeemable partnership units, value Partners' Capital Account, Exchanges and Conversions Conversions of noncontrolling interests to stockholders’ equity Conversions of noncontrolling interests to Stockholders' Equity Conversions of noncontrolling interests to Stockholders' Equity Award Timing Disclosures [Line Items] 751 Gateway Holdings LLC 751 Gateway Holdings LLC [Member] 751 Gateway Holdings LLC Hotel [Member] Hotel [Member] Restriction on redemption of OP units from date of issuance (years) Restriction On Redemption Of OP Units From Date Of Issuance In Years Restriction On Redemption Of OP Units From Date Of Issuance In Years Unsecured term loan, net Unsecured term loan, net Other Borrowings Derivative, Gain (Loss) on Derivative, Net Derivative, Gain (Loss) on Derivative, Net Investment, Name [Domain] Investment, Name [Domain] Portion at Fair Value Measurement [Member] Portion at Fair Value Measurement [Member] Accrued interest payable Increase (Decrease) in Interest Payable, Net Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at June 30, 2024 and December 31, 2023, respectively) Finance Lease, Right-of-Use Asset Finance Lease, Right-of-Use Asset, before Accumulated Amortization PR II BXP Reston Gateway LLC PR II BXP Reston Gateway LLC [Member] PR II BXP Reston Gateway LLC Debt Instrument, Description of Variable Rate Basis Debt Instrument, Description of Variable Rate Basis Rental Revenue Total Rental Revenue Total Rental Revenue Total Total adjustments Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities Schedule Of Balance Sheets Of The Unconsolidated Joint Ventures [Text Block] Schedule Of Balance Sheets Of The Unconsolidated Joint Ventures [Text Block] Schedule Of Balance Sheets Of The Unconsolidated Joint Ventures [Text Block] 200 Fifth Avenue JV LLC Two Zero Zero Fifth Avenue JV LLC [Member] Two Zero Zero Fifth Avenue JV LLC Vested 2012 OPP units and MYLTIPS Conversion of 2012 OPP units and MYLTIPS [Member] Conversion of 2012 OPP units and MYLTIPS Leases [Abstract] Leases [Abstract] Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $7,490,887 and $7,054,075 at June 30, 2024 and December 31, 2023, respectively) Real Estate Investment Property, at Cost Deductible in insurance as a percentage of the value of the affected property, San Francisco and Los Angeles Earthquake Deductible Insurance Percentage Of Value Of The Affected Property San Francisco and Los Angeles Earthquake Deductible Insurance Percentage Of Value Of The Affected Property San Francisco and Los Angeles 901 New York Avenue LLC [Member] Bp Crf Nine Zero One New York Avenue Llc [Member] BP/CRF Nine Zero One New York Avenue LLC [Member] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Land held for future development Land Available for Development Gain on Unconsolidated Joint Venture Investment Gain on Unconsolidated Joint Venture Investment Gain on Unconsolidated Joint Venture Investment Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Hotel Tower Developer LLC [Member] Hotel Tower Developer LLC [Member] Hotel Tower Developer LLC [Member] Accrued rental income, net Straight Line Rent Award Timing Method Award Timing Method [Text Block] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Variable lease payments Operating Lease, Variable Lease Income Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Insider Trading Policies and Procedures [Line Items] Stock Option And Incentive Plan And Stock Repurchase Plan [Domain] Stock Option And Incentive Plan And Stock Repurchase Plan [Domain] Stock Option And Incentive Plan And Stock Repurchase Plan [Domain] Use of Estimates in the Preparation of Financial Statements Use of Estimates, Policy [Policy Text Block] Long Term Debt, Including Accrued Interest Long Term Debt, Including Accrued Interest Long Term Debt, Including Accrued Interest Noncontrolling interest - Redeemable partnership units [Member] Noncontrolling interest - Redeemable partnership units [Member] Noncontrolling interest - Redeemable partnership units [Member] Adjustment to Compensation, Amount Adjustment to Compensation Amount Compensation Amount Outstanding Recovery Compensation Amount Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Entity Small Business Entity Small Business Company Selected Measure Amount Company Selected Measure Amount Acquisitions of real estate Payments to Acquire Real Estate Debt Issuance Costs Payments of Debt Issuance Costs Tabular List, Table Tabular List [Table Text Block] Percent of Carrying Value of Real Estate, Gross Percent of Carrying Value of Real Estate, Gross Percent of Carrying Value of Real Estate, Gross Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Fiscal Period Duration Fiscal Period Duration Unrealized gain on derivative instruments Unrealized Gain (Loss) on Derivatives Excess stock, $0.01 par value, 150,000,000 shares authorized, none issued or outstanding Excess Stock Value Excess Stock Value Reedemable deferred stock units, units Temporary Equity, Shares Subscribed but Unissued Noncontrolling interests in property partnerships Noncontrolling interest in property partnerships Noncontrolling Interest in Net Income (Loss) Limited Partnerships, Nonredeemable Operating Lease, Lease Income [Table Text Block] Operating Lease, Lease Income [Table Text Block] Statements Of Operations Of The Joint Ventures Schedule Of Statements Of Operations Of The Unconsolidated Joint Ventures [Text Bock] Schedule Of Statements Of Operations Of The Unconsolidated Joint Ventures [Text Bock] Credit Facility [Domain] Credit Facility [Domain] Secured debt leverage ratio - maximum Secured debt leverage ratio - maximum Secured debt leverage ratio - maximum Other comprehensive income : Other Comprehensive Income (Loss), Net of Tax [Abstract] Preferred Stock, Redemption Price Per Share Preferred Stock, Redemption Price Per Share Entity Information [Line Items] Entity Information [Line Items] Derecognition of assets in exchange for sales-type lease obligation Derecognition of assets in exchange for sales-type lease obligation Derecognition of assets in exchange for sales-type lease obligation Employee Stock Option Share-Based Payment Arrangement, Option [Member] MYLTIP 2019 [Member] MYLTIP two thousand nineteen [Member] MYLTIP two thousand nineteen [Member] Forfeitures, in units Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Forfeitures 2025 Lessee, Operating Lease, Liability, to be Paid, Year One Return of deposit on mortgage note payable interest rate lock Proceeds from (Payments for) Other Financing Activities Noncontrolling Interest, Increase from Sale of Parent Equity Interest Noncontrolling Interest, Increase from Sale of Parent Equity Interest 171 Dartmouth Street air rights [Member] One Zero Zero Clarendon Street air rights [Member] One Zero Zero Clarendon Street air rights Comprehensive income attributable to BXP, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Repayments of unsecured line of credit Repayments of Lines of Credit Net Present Value and Operating Lease Liability Net Present Value and Operating Lease Liability Net Present Value and Operating Lease Liability Award Type [Axis] Award Type [Axis] Cumulative Effect, Period of Adoption, Adjustment Cumulative Effect, Period of Adoption, Adjustment [Member] Stockholders Equity / Partners Capital [Abstract] Stockholders Equity / Partners Capital [Abstract] Stockholders Equity / Partners Capital [Abstract] Basic earnings per common share / unit attributable to the Company common shareholders / unitholders Basic Earnings: Earnings Per Share, Basic [Abstract] Estimated liability, not accrued Estimated liability, not accrued Estimated liability, not accrued Hub on Causeway - Hotel Air Rights Hub on Causeway - Hotel Air Rights [Member] Hub on Causeway - Hotel Air Rights Cash Held in Escrows Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Excess stock, shares outstanding Excess Stock, Shares Outstanding Net income attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest [Abstract] ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Net activity from contributions and unearned compensation, value Partners' Capital Account, Contributions Total liabilities Liabilities Dividends, Per Unit, Cash Paid Common Stock / Unit, Dividends / Distributions, Per Share / Unit, Cash Paid Common Stock, Dividends, Per Share, Cash Paid BP-M 3HB Venture LLC [Member] 3 Hudson Boulevard [Member] Three Hudson Boulevard [Member] 3 Hudson Boulevard [Member] Line of Credit Facility, Covenant Terms Line of Credit Facility, Covenant Terms Lessee, Finance Lease, Variable Lease Payment, Terms and Conditions Lessee, Finance Lease, Variable Lease Payment, Terms and Conditions Common Stock, Par or Stated Value Per Share Common Stock, Par or Stated Value Per Share Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Seattle Seattle [Member] Seattle Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Revolving Credit Facility [Member] Revolving Credit Facility [Member] Expiration Date Trading Arrangement Expiration Date Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Schedule of Derivative Assets at Fair Value [Table Text Block] Schedule of Derivative Assets at Fair Value [Table Text Block] Total Shareholder Return Amount Total Shareholder Return Amount Property Subject to Operating Lease Property Subject to Operating Lease [Member] Shares of Common Stock issued in connection with redemption of an equal number of OP Units (in shares) Conversion of Stock, Shares Issued Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] 360 PAS Holdco LLC (indirect ownership) Three Six Zero PAS Holdco LLC (indirect ownership) [Member] Three Six Zero PAS Holdco LLC (indirect ownership) Subsequent Event [Line Items] Subsequent Event [Line Items] Options exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Debt Instrument [Line Items] Debt Instrument [Line Items] Debt Instrument, Unused Borrowing Capacity, Amount Debt Instrument, Unused Borrowing Capacity, Amount Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Other assets Other Assets Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Acquisition of noncontrolling interest in property partnership Proceeds from (Payments to) Noncontrolling Interests Cash Cash [Member] Weighted average number of common and common equivalent shares / units outstanding (in shares / units) Diluted Earnings: Net income attributable to the Company (in shares / units) Weighted Average Number of Shares Outstanding, Diluted Related party note receivable, net Related party note receivable Financing Receivable, after Allowance for Credit Loss MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Total stockholders' equity attributable to Boston Properties, Inc. Members’/Partners’ equity Equity, Attributable to Parent Lease liability - finance lease deconsolidated Lease liability - finance lease deconsolidation Lease liability - finance lease deconsolidation Total real estate Total real estate Real Estate Investment Property, Net Line of Credit Facility, Covenant Compliance Line of Credit Facility, Covenant Compliance Treasury common stock at cost, 78,900 shares at June 30, 2024 and December 31, 2023 Treasury Stock, Value Management Service [Member] Management Service [Member] Deferred Compensation, Excluding Share-Based Payments and Retirement Benefits Deferred Compensation, Excluding Share-Based Payments and Retirement Benefits [Member] Construction in progress Construction in Progress, Gross Lessor, Operating Lease, Existence of Option to Terminate [true false] Lessor, Operating Lease, Existence of Option to Terminate [true false] Proceeds from Unsecured Lines of Credit Proceeds from Unsecured Lines of Credit Allocated net income for the period Equity Profit Loss Net Income. Redemption/repurchase of unsecured exchangeable senior notes Repayments of Convertible Debt Interest Rate Cap Interest Rate Cap [Member] Debt Instrument, Increase, Accrued Interest Debt Instrument, Increase, Accrued Interest Common stock available for issuance Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Line of Credit Facility, Interest Rate Reduction Line of Credit Facility, Interest Rate Reduction Line of Credit Facility, Interest Rate Reduction Document Fiscal Period Focus Document Fiscal Period Focus All Executive Categories All Executive Categories [Member] Stock Based Compensation (in shares / units) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements LTIP and MYLTIP Units [Member] LTIP and 2014 MYLTIP Units [Member] LTIP and 2014 MYLTIP Units [Member]. Real estate and intangibles recorded upon consolidation Fair Value of Assets Acquired Land subject to ground lease, percentage Land subject to ground lease, percentage of rentable square feet Land subject to ground lease, percentage of rentable square feet Derivative, Inception Date Derivative, Inception Date 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Two Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Non-cash contributions from noncontrolling interest in property partnerhips Contribution of Property ASSETS Assets [Abstract] Other comprehensive income Other Comprehensive Income (Loss), Net of Tax Noncontrolling Interest, Outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Document Type Document Type Line of Credit Facility, Commitment Fee Percentage Line of Credit Facility, Commitment Fee Percentage Debt Instrument, Interest Rate, Effective Percentage Debt Instrument, Interest Rate, Effective Percentage Derivative Contract [Domain] Derivative Contract [Domain] Proceeds from Deposits on Real Estate Sales Proceeds from Deposits on Real Estate Sales Schedule Of Segment Information By Geographic Area And Property Type Schedule of Segment Reporting Information, by Segment [Table Text Block] Property partnerships Noncontrolling Interest in Limited Partnerships Noncontrolling Interest in Limited Partnerships Nonrelated Party Nonrelated Party [Member] Investments in securities, net Payments to Acquire Marketable Securities Derivative, Average Fixed Interest Rate Derivative, Average Fixed Interest Rate Other income (expense) Other Income and Expenses [Abstract] 2022 Unsecured Term Loan Unsecured Term Loan [Member] Unsecured Term Loan Schedule of Finite-Lived Intangible Assets, Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Sales-type lease receivable, net Sales-Type Lease, Net Investment in Lease, after Allowance for Credit Loss, Current Subsequent Event [Table] Subsequent Event [Table] Distributions Payable, Amount Per Unit Dividends Payable, Amount Per Share / Unit Dividends Payable, Amount Per Share Maximum [Member] Maximum [Member] Senior Loans Senior Loans [Member] Boston Properties, Inc. [Member] Parent Company [Member] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Safeco Partner Entity Two Safeco Partner Entity Two [Member] Safeco Partner Entity Two Allocation of undistributed earnings to participating securities (in dollars per share / unit) Allocation of undistributed earnings to participating securities ($ per shares) Allocation of undistributed earnings to participating securities ($ per share shares) 290 Binney Two Nine Zero Binney [Member] 290 Binney Allocation of undistributed earnings to participating securities (in shares / units) Allocation of undistributed earnings to participating securities (in shares) Allocation of undistributed earnings to participating securities (in shares) Investment Type [Axis] Investment Type [Axis] Rental Direct Costs of Leased and Rented Property or Equipment 360 Park Avenue South Partners Entity Three Six Zero Park Avenue South Partners Entity One [Member] Three Six Zero Park Avenue South Partners Entity One Tenant leasing costs Lease, Cost Effect of Dilutive Securities: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] Range [Axis] Statistical Measurement [Axis] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Lessor, Lease, Description [Line Items] Lessor, Lease, Description [Line Items] Transfer Of Tenant Improvements Real Estate Transfer Of Tenant Improvements Real Estate Transfer Of Tenant Improvements Real Estate Total Capital [Member] Capital [Member] Capital [Member] Distributions to noncontrolling interests in property partnerships Payments to Noncontrolling Interests Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Residential Tower Developer LLC [Member] Residential Tower Developer LLC [Member] Residential Tower Developer LLC [Member] Other Significant Noncash Transaction, Value of Consideration Given Other Significant Noncash Transaction, Value of Consideration Given Name Outstanding Recovery, Individual Name Lessor, Sales-type Leases Lessor, Sales-type Leases [Text Block] Boston Properties Limited Partnership partners’ capital— 1,762,341 and 1,755,150 general partner units and 155,335,500 and 155,185,716 limited partner units outstanding at June 30, 2024 and December 31, 2023, respectively General And Limited Partners Capital Account General And Limited Partners Capital Account Finance Lease, Liability, Reversal from Re-Assessment Finance Lease, Liability, Reversal from Re-Assessment Finance Lease, Liability, Reversal from Re-Assessment Redemption of operating partnership units to common stock, value Stock Issued During Period, Value, Conversion of Units Program trigger deductible Program trigger deductible Program trigger deductible Award Timing Predetermined Award Timing Predetermined [Flag] Sales-type and Direct Financing Leases, Lease Receivable, Maturity Sales-Type and Direct Financing Leases, Payment to be Received, Maturity [Table Text Block] Subsequent Event Type [Domain] Subsequent Event Type [Domain] 121 Broadway One Two One Broadway [Member] One Two One Broadway Mortgage notes payable recorded upon consolidation Loans Assumed Investment, Name [Axis] Investment, Name [Axis] Diluted Earnings: Net income, Per Share Amount (in dollars per share / unit) Earnings Per Share, Diluted Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] 360 Park Avenue South Partners Entity Two Three Six Zero Park Avenue South Partners Entity Two [Member] Three Six Zero Park Avenue South Partners Entity Two Building and improvements Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings Ownership [Axis] Ownership [Axis] Repayments of Construction Loans Payable Repayments of Construction Loans Payable Beginning Balance Partners' Capital, Including Portion Attributable to Noncontrolling Interest ATM Program [Member] Atm Program [Member] Prior Atm Program [Member] Preferred stock / units, shares / units issued (in shares / units) Preferred Stock, Shares Issued Allocation of undistributed earnings to participating securities Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] capitlization rate capitlization rate capitlization rate Net Income (loss) Net income (loss) Net Loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Safeco Partner Entity One [Member] Safeco Partner Entity One [Member] Safeco Partner Entity One Derivative, Notional Amount Derivative, Notional Amount Stock Based Compensation Dilutive Securities, Effect on Basic Earnings Per Share 7750 Wisconsin Avenue [Member] Seven Seven Five Zero Wisconsin Avenue [Member] 7750 Wisconsin Avenue [Member] Weighted-average period (years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Line of Credit Borrowing Capacity Increase (Decrease) Line of Credit Borrowing Capacity Increase (Decrease) Line of Credit Borrowing Capacity Increase (Decrease) Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Cash Equivalents, at Carrying Value Cash Equivalents, at Carrying Value 2012 OPP Units and Vested MYLTIPs 2012 OPP Units and Vested MYLTIPs [Member] 2012 OPP Units and Vested MYLTIPs Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Interest expense Interest expense Interest Expense, Operating and Nonoperating Weighted Average Number Of Shares Outstanding After Allocation of Undistributed Earnings to Participating Securities Basic (in shares) Weighted Average Number Of Shares Outstanding After Allocation of Undistributed Earnings to Participating Securities Basic (in shares) Weighted Average Number Of Shares Outstanding After Allocation of Undistributed Earnings to Participating Securities Basic (in shares) Investments in Unconsolidated Joint Ventures Equity Method Investments [Policy Text Block] 3.916% unsecured senior notes Three point nine one six percent unsecured senior notes [Member] 3.916% unsecured senior notes Increase (Decrease) in Operating Liabilities Increase (Decrease) in Operating Liabilities All Adjustments to Compensation All Adjustments to Compensation [Member] Investments In Unconsolidated Joint Ventures Equity Method Investments [Table Text Block] Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Additional paid-in capital Additional Paid in Capital Short-Term Debt, Type [Domain] Short-Term Debt, Type [Domain] Maximum funding obligation Guarantor Obligations, Maximum Exposure, Undiscounted Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Noncontrolling Interest [Table] Noncontrolling Interest [Table] Discount Rate Investment in Unconsolidated Joint Venture, Measurement Input Investment in Unconsolidated Joint Venture, Measurement Input Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Derivative, Swap Type Derivative, Swap Type Legal Entity [Axis] Legal Entity [Axis] Rental Expenses: % Of Grand Totals Percentage Of Total Rental Expenses Percentage Of Total Rental Expenses. Extension Option (in years) Extension Option (in years) Extension Option (in years) Scenario [Domain] Scenario [Domain] Lease Lease Operating Lease, Lease Income Net Operating Income: % of Grand Totals Percentage Of Total Net Operating Income Percentage Of Total Net Operating Income Name of Property [Domain] Name of Property [Domain] Property Subject to or Available for Operating Lease [Domain] Property Subject to or Available for Operating Lease [Domain] Difference Between Proceeds from Sale and Noncontrolling Interest Difference Between Proceeds from Sale and Noncontrolling Interest Difference Between Proceeds from Sale and Noncontrolling Interest Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Entity Address, State or Province Entity Address, State or Province Weighted Average Price of Shares Purchased Share-Based Compensation Arrangement by Share-Based Payment Award, Per Share Weighted Average Price of Shares Purchased 6.619% unsecured senior notes Six point Six One Nine Percent [Member] Six point Six One Nine Percent Derivative Instruments and Hedging Activities Disclosure [Abstract] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Extension Option (in months) Extension Option (in months) Extension Option (in months) Separate Unrestricted Cash For Deferred Compensation Plan. Separate Unrestricted Cash For Deferred Compensation Plan. Separate Unrestricted Cash For Deferred Compensation Plan. General Partner [Member] General Partner [Member] Tower Property Tower Property [Member] Tower Property Dividends Dividend Policy [Policy Text Block] Dividend Policy Redeemable Common Units Redeemable Common Units Redeemable Common Units Deferred Charges Deferred Charges, Policy [Policy Text Block] LIABILITIES AND EQUITY LIABILITIES AND MEMBERS'/PARTNERS' EQUITY Liabilities and Equity [Abstract] Derivative, Maturity Date Derivative, Contract End Date Construction Loans Construction Loans [Member] Excess stock, par value Excess Stock Par Or Stated Value Per Share Excess Stock, Par or Stated Value Per Share Restatement Determination Date Restatement Determination Date Estimated Fair Value [Member] Estimate of Fair Value Measurement [Member] Contractual Sales Price Contractual Sales Price Contractual Sales Price Proceeds from Interest Received Proceeds from Interest Received Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Derivative, All in interest rate Derivative, All in interest rate Derivative, All in interest rate Metropolitan Square Metropolitan Square [Member] Metropolitan Square Right of use assets - operating leases (amounts related to VIEs of $149,605 and $158,885 at June 30, 2024 and December 31, 2023, respectively) Right of use assets - operating leases (amounts related to VIEs of $149,605 and $158,885 at June 30, 2024 and December 31, 2023, respectively) Operating Lease, Right-of-Use Asset Operating Lease, Right-of-Use Asset Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Short-Term Debt, Type [Axis] Short-Term Debt, Type [Axis] Investments in Affiliates, Subsidiaries, Associates, and Joint Ventures, Fair Value Disclosure Investments in Affiliates, Subsidiaries, Associates, and Joint Ventures, Fair Value Disclosure Capital contributions to unconsolidated joint ventures Payments to Acquire Equity Method Investments Earthquake Deductible Insurance Percentage of Value of the Affected Property Seattle Earthquake Deductible Insurance Percentage of Value of the Affected Property Seattle Earthquake Deductible Insurance Percentage of Value of the Affected Property Seattle Unencumbered Asset Value - Minimum Unencumbered Asset Value - Minimum Unencumbered Asset Value - Minimum Lease Contractual Term [Axis] Lease Contractual Term [Axis] Earnings Per Share / Common Unit Earnings Per Share [Text Block] Debt Instrument, Covenant Description Debt Instrument, Covenant Description Shares issued pursuant to stock purchase plan, value Stock Issued During Period, Value, Employee Stock Purchase Plan Subsequent Event [Member] Subsequent Event [Member] Expenses Costs and Expenses [Abstract] Cash held in escrows (amounts related to VIEs of $6,805 and $22,160 at June 30, 2024 and December 31, 2023, respectively) Cash held in escrows, beginning of period Cash held in escrows,end of period Restricted Cash and Cash Equivalents, Current Gains from investments in securities Gains from investments in securities Gains from investments in securities Gain (Loss) on Investments Tenant Improvements Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Tenant Improvements Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Tenant Improvements Lessee Disclosure [Abstract] Lessee Disclosure [Abstract] Income Taxes Income Tax, Policy [Policy Text Block] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Other Income - assignment fee Other Income Segment [Domain] Segments [Domain] Tenant improvements Leasehold Improvements, Gross Finance Lease, Liability, Maturity Finance Lease, Liability, to be Paid, Maturity [Table Text Block] Lessee, Operating Lease, Discount Rate Lessee, Operating Lease, Discount Rate Redemption of unsecured senior notes Repayments of Unsecured Debt Repayments of Unsecured Debt Borrowings on unsecured line of credit Proceeds from Lines of Credit Washington, DC [Member] DISTRICT OF COLUMBIA PEO PEO [Member] Name Trading Arrangement, Individual Name Number of floors Number of floors Number of floors Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Entity Public Float Entity Public Float Company's share of equity Company Share Of Equity Company Share Of Equity Income (loss) from unconsolidated joint ventures Loss (income) from unconsolidated joint ventures Income (Loss) from Equity Method Investments Income (loss) from unconsolidated joint ventures Income (Loss) from Equity Method Investments Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Gain (Loss) on Fair Value Hedges Recognized in Earnings Gain (Loss) on Fair Value Hedges Recognized in Earnings Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Dividends and distributions payable Dividends and distributions declared but not paid Dividends Payable Number of VIEs Number of VIEs Number of VIEs - consolidated Investment in unconsolidated joint ventures recorded upon deconsolidation Transfer to Investments Number of Business Days, Average Closing Price Number of Business Days, Average Closing Price Number of Business Days, Average Closing Price Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Basis differential Income Statement Basis Differential Income Statement Basis Differential Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Noncash or Part Noncash Acquisition, Other Assets Acquired Noncash or Part Noncash Acquisition, Other Assets Acquired Rental Revenue: Residential Rental Revenue Residential Rental Revenue Residential. Company's share of Net Operating Income Net Operating Income The net result for the period of deducting property operating expenses from property operating revenues. Local Phone Number Local Phone Number OP Units [Member] Op Units [Member] OP Units [Member] Cash and cash equivalents deconsolidated Payments for (Proceeds from) Other Real Estate Partnerships Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Operating Operating Expenses Asset Acquisition [Line Items] Asset Acquisition [Line Items] Schedule of Equity Method Investments [Table] Equity Method Investment [Table] Deferred Bonus and Profit Sharing Arrangement, Individual Contract, Type of Deferred Compensation [Domain] Deferred Bonus and Profit Sharing Arrangement, Individual Contract, Type of Deferred Compensation [Domain] Gain (Loss) from interest rate contracts Gain (Loss) from interest rate contracts Derivative, Net Hedge Ineffectiveness Gain (Loss) Change in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] PEO Total Compensation Amount PEO Total Compensation Amount Unsecured senior notes, net Senior Notes Senior Notes 2023 Unsecured Term Loan 2023 Unsecured Term Loan [Member] 2023 Unsecured Term Loan Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Income Statement Location [Axis] Statement of Income Location, Balance [Axis] Number of parking space Number of parking space Number of parking space Debt Disclosure [Abstract] Debt Disclosure [Abstract] 7750 Wisconsin Avenue LLC [Member] Seven seven five zero Wisconsin Avenue LLC [Member] 7750 Wisconsin Avenue LLC [Member] Common Stock [Member] Common Stock [Member] Redemption of OP units issued on conversion of LTIP, OPP and MYLTIP units (in shares) Redemption Of OP Units Issued On Conversion Of LTIP and MYLTIP Units Redemption Of OP Units Issued On Conversion Of LTIP and MYLTIP Units Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Depository shares of Series B Cumulative Redeemable Preferred Depository shares of Series B Cumulative Redeemable Preferred [Member] Depository shares of Series B Cumulative Redeemable Preferred Line of Credit [Member] Line of Credit [Member] Segment Reporting [Abstract] Segment Reporting [Abstract] Entity Central Index Key Entity Central Index Key Scenario [Axis] Scenario [Axis] Equity Method Investments and Joint Ventures [Abstract] 540 Madison Avenue [Member] Five Four Zero Madison Venture Llc [Member] Five Four Zero Madison Venture LLC [Member]. Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount REIT Distribution Requirement REIT Distribution Requirement REIT Distribution Requirement Stockholders' Equity / Partners' Capital Equity [Text Block] Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Segment Reporting Disclosure [Text Block] Segment Reporting Disclosure [Text Block] Adjusted Term Secured Overnight Financing Rate (Adjusted Term SOFR) Adjusted Term Secured Overnight Financing Rate Sofr Overnight Index Swap Rate [Member] Adjusted Term Secured Overnight Financing Rate Sofr Overnight Index Swap Rate Coverage For Acts Of Terrorism Under TRIA Covered in Excess of Amount Covered by IXP Coverage For Acts Of Terrorism Under TRIA Covered in Excess of Amount Covered by IXP Coverage For Acts Of Terrorism Under TRIA Covered in Excess of Amount Covered by IXP Payments to Acquire Real Estate and Real Estate Joint Ventures Payments to Acquire Real Estate and Real Estate Joint Ventures Debt Instrument, Interest Rate, Increase (Decrease) Debt Instrument, Interest Rate, Increase (Decrease) Text Block [Abstract] Amortization of sales type lease Accretion Expense Restricted Stock [Member] Restricted Stock [Member] Measurement Basis [Axis] Measurement Basis [Axis] 6.924% unsecured senior notes Six point nine two four percent unsecured senior notes [Member] Six point nine two four percent unsecured senior notes Title Trading Arrangement, Individual Title Unsecured Debt [Member] Unsecured Debt [Member] Consolidated Entities [Axis] Consolidated Entities [Axis] Los Angeles [Member] Los Angeles [Member] Los Angeles [Member] Net income attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Consolidation, Variable Interest Entity, Policy Consolidation, Variable Interest Entity, Policy [Policy Text Block] City Area Code City Area Code Properties Name of Joint Venture Property Name of Joint Venture Property Operating partnership guarantee to cover liabilities of IXP Operating partnership guarantee to cover liabilities of subsidiary Operating partnership guarantee to cover liabilities of subsidiary Lessee, Operating Lease Payment Increase (Decrease), Percentage Lessee, Operating Lease Payment Increase (Decrease), Percentage Lessee, Operating Lease Payment Increase (Decrease), Percentage Office and Life Sciences Building [Member] Office Building [Member] Revenue Recognition Revenue [Policy Text Block] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Dividends Payable [Table] Dividends Payable [Table] Entity Information [Line Items] Document Information [Line Items] Rental Expenses: Class A Office Rental Expenses Class Office Rental Expenses Class Office Tenant and Other Receivables and Notes Receivable Receivable [Policy Text Block] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Square 407 Limited Partnership [Member] Square Four Zero Seven Limited Partnership [Member] Square 407 Limited Partnership [Member]. Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Subsequent Event Type [Axis] Subsequent Event Type [Axis] U.S. Treasury Bill, Term of Contract U.S. Treasury Bill, Term of Contract U.S. Treasury Bill, Term of Contract Proceeds from unsecured senior notes Proceeds from Issuance of Unsecured Debt Earnings Per Share [Abstract] Earnings Per Share [Abstract] Equity [Abstract] Equity [Abstract] Dividends in excess of earnings Retained Earnings (Accumulated Deficit) MYLTIP 2018 MYLTIP Two thousand eighteen [Member] MYLTIP Two thousand eighteen Class of Stock [Domain] Class of Stock [Domain] General and administrative General and administrative expense General and Administrative Expense Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Equity Awards Adjustments Equity Awards Adjustments [Member] Property Subject to or Available for Operating Lease [Axis] Property Subject to or Available for Operating Lease [Axis] Lease liabilities - operating leases (amounts related to VIEs of $151,643 and $145,826 at June 30, 2024 and December 31, 2023, respectively) Operating Lease, Liability Lease Liabilities - Operating Leases Operating Lease, Liability Underlying Securities Award Underlying Securities Amount Payment for Debt Extinguishment or Debt Prepayment Cost Payment for Debt Extinguishment or Debt Prepayment Cost Payment for Debt Extinguishment or Debt Prepayment Cost One OP unit is equivalent to one share of Common Stock (in shares) Common Stock Conversion Rate Common Stock Conversion Rate Repayment of unsecured term loan Repayment of unsecured term loan Repayments of Other Debt Dividends, Common Stock, Cash Dividends, Common Stock, Cash Amendment Flag Amendment Flag Carrying Amount [Member] Reported Value Measurement [Member] Unsecured commercial paper Commercial Paper Subordinated Debt Subordinated Debt [Member] Construction in progress, net deconsolidated Construction in progress, net deconsolidated Construction in progress, net deconsolidated Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Noncontrolling interests in property partnerships Partners' Capital Attributable to Noncontrolling Interest Subsequent Events [Abstract] Subsequent Events [Abstract] Tenant improvements Payments for Tenant Improvements Payments on capital lease obligations Repayments of Long-Term Capital Lease Obligations Debt Issuance Costs, Net Debt Issuance Costs, Net Debt Disclosure [Text Block] Debt Disclosure [Text Block] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Debt - Total loan amount Debt Instrument, Face Amount Entity Address, Postal Zip Code Entity Address, Postal Zip Code Interest Rate Swap Interest Rate Swap [Member] MYLTIP 2024 MYLTIP Two Thousand Twenty Four [Member] MYLTIP Two Thousand Twenty Four Land Land Cash and cash equivalents (amounts related to VIEs of $378,992 and $245,317 at June 30, 2024 and December 31, 2023, respectively) Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash and Cash Equivalents, at Carrying Value Number of Units in Real Estate Property Number of Units in Real Estate Property Lessor, Operating Leases [Text Block] Lessor, Operating Leases [Text Block] Deposit on capital lease Payments for (Proceeds from) Other Investing Activities Unearned compensation Partners' Capital Account, Deferred Compensation Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Company's Share of Net Operating Income: % of Grand Totals Percentage of Company's Share of Net Operating Income Percentage of Company's Share of Net Operating Income Losses from early extinguishment of debt Losses from early extinguishment of debt Losses from early extinguishment of debt Gain (Loss) on Extinguishment of Debt Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Number of extensions Number of extensions Number of extensions Accrued Liabilities Accrued Liabilities Employee Stock Employee Stock [Member] Noncontrolling Interest Disclosure [Text Block] Noncontrolling Interest Disclosure [Text Block] Depreciation and amortization Depreciation and amortization expense Depreciation, Depletion and Amortization, Nonproduction Fair Value Measurement [Domain] Fair Value Measurement [Domain] Short-Term Debt [Table] Short-Term Debt [Table] Above and below market rent adjustments, net Above And Below Market Rent Adjustments Above And Below Market Rent Adjustments Proceeds from sales of real estate Proceeds from Sale, Real Estate, Held-for-Investment Entity Listing, Par Value Per Share Entity Listing, Par Value Per Share Op units and LTIP units Op units and LTIP units [Member] Op units and LTIP units Net Working Capital, Including Cash Acquired from Acquisition Cash Acquired from Acquisition Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Fixed charge coverage - minimum Fixed charge coverage - minimum Fixed charge coverage - minimum Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table] Consolidation, Less-than-Wholly-Owned Subsidiary, Parent Ownership Interest, Effect of Change [Table] Payments on finance lease obligations Finance Lease, Principal Payments Net income attributable to the Company Net income attributable to the Company Net Income (Loss) Available to Common Stockholders, Basic Notes receivable, net Increase (Decrease) in Finance Receivables Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Allowance for current expected credit losses (gains) Provision for Loan and Lease Losses Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] 3.766% unsecured senior notes Three point seven six six percent unsecured senior notes [Member] 3.766% unsecured senior notes Total assets Assets Operating expense Operating expense Operating expense Cost of Goods and Services Sold Basis Differential Basis Differential [Member] Basis Differential Company's Share [Member] Company's Share [Member] Company's Share [Member] Accrued rental income, net (amounts related to VIEs of $416,840 and $401,159 at June 30, 2024 and December 31, 2023, respectively) Accrued rental income, net (amounts related to VIEs of $416,840 and $401,159 at June 30, 2024 and December 31, 2023, respectively) Deferred Rent Receivables, Net Commitments And Contingencies Disclosure [Table] Commitments And Contingencies Disclosure [Table] Commitments and Contingencies Disclosure [Table] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Axis] Commitments and contingencies (See Note 8) Commitments and Contingencies Stock-Based Employee Compensation Plans Share-Based Payment Arrangement [Policy Text Block] Right of use assets - operating lease Increase (Decrease) in Prepaid Rent Noncontrolling interest - common units of the Operating Partnership Noncontrolling interest-common units of the Operating Partnership Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable Termination Date Trading Arrangement Termination Date Title of 12(g) Security Title of 12(g) Security Employee and director payment per share (in dollars per share) Employee and director payment per share Employee and director payment per share Transfer Of Tenant Lease Costs Real Estate Transfer Of Tenant Lease Costs Real Estate Transfer Of Tenant Lease Costs Real Estate Environmental Focused Investment Fund Environmental Focused Investment Fund [Member] Environmental Focused Investment Fund 2026 Lessee, Operating Lease, Liability, to be Paid, Year Two Other liabilities (amounts related to VIEs of $95,202 and $115,275 at June 30, 2024 and December 31, 2023, respectively) Other Liabilities Other Liabilities Other Liabilities Leverage ratio - maximum Leverage ratio - maximum Leverage ratio - maximum Final awards percentage of target Final awards percentage of target Final awards percentage of target Debt Instrument [Axis] Debt Instrument [Axis] Right of use assets - finance leases Right of use assets - finance leases Right of use assets - finance leases Noncontrolling Interest [Abstract] Noncontrolling Interest [Abstract] 300 Binney Street Three Zero Zero Binney Street [Member] Three Zero Zero Binney Street Net income attributable to BXP, Inc. Net Income (Loss) Net Income (Loss) Attributable to Parent Net Income (Loss) Attributable to Parent Trading Arrangement: Trading Arrangement [Axis] Fair Value, by Balance Sheet Grouping [Table Text Block] Fair Value, by Balance Sheet Grouping [Table Text Block] Other revenue Other revenue Revenue from Contract with Customer, Including Assessed Tax Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Gateway Portfolio Holdings LLC [Member] Gateway Commons Complex [Member] Gateway Commons Complex [Member] Gateway Commons Complex [Member] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Entity File Number Entity File Number Consolidated Entities [Domain] Consolidated Entities [Domain] 760 Boylston Street Seven Six Zero Boylston Street [Member] Seven Six Zero Boylston Street Noncontrolling Interests [Member] Noncontrolling Interest [Member] Noncontrolling Interest [Member] Earnings Per Share After Allocation of Undistributed Earnings to Participating Securities Basic (dollars per share) Earnings Per Share After Allocation of Undistributed Earnings to Participating Securities Basic (dollars per share) Earnings Per Share After Allocation of Undistributed Earnings to Participating Securities Basic (dollars per share) Earnings Per Share After Allocation of Undistributed Earnings to Participating Securities Basic (dollars per share) Income Statement [Abstract] Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One Schedule of Real Estate Properties [Table] Real Estate Property, Ownership [Table] Prepaid rent reclassified to right of use asset Prepaid rent reclassified to right of use asset Prepaid rent reclassified to right of use asset Lessee, Operating Lease, Term of Contract Lessee, Operating Lease, Term of Contract Name Forgone Recovery, Individual Name Investment in Securities Investment, Policy [Policy Text Block] Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Capitalized operating lease costs Capitalized operating lease costs Capitalized operating lease costs Consolidated Entities, Ownership Percentage Consolidated Entities, Ownership Percentage Consolidated Entities, Ownership Percentage Adjustment to Compensation: Adjustment to Compensation [Axis] Document Quarterly Report Document Quarterly Report Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax OP unit conversion rate (in shares) OP Unit Conversion Rate OP Unit Conversion Rate. Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Schedule of Real Estate Properties Property, Plant, and Equipment, Lessor Asset under Operating Lease [Table Text Block] Weighted average number of common shares / units outstanding (in shares / units) Net income (loss) attributable to the company (in shares / units) Weighted Average Number of Shares Outstanding, Basic Related Party [Axis] Related and Nonrelated Parties [Axis] Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Preferred Stock, Redemption Amount Preferred Stock, Redemption Amount Total equity / capital Equity, value Equity, value Equity, Including Portion Attributable to Noncontrolling Interest Deposit on mortgage note payable interest rate lock Payments for (Proceeds from) Deposit on Loan New York [Member] NEW YORK Name Awards Close in Time to MNPI Disclosures, Individual Name Loss Contingency, Portion Not Accrued Loss Contingency, Range of Possible Loss, Portion Not Accrued Construction in Progress Construction in Progress [Member] Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Real Estate Owned, Transfer from Real Estate Owned Real Estate Owned, Transfer from Real Estate Owned Entity Filer Category Entity Filer Category Lessor, Operating Lease, Payments to be Received, Maturity Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block] 3.350% unsecured senior notes Three point three five zero percent unsecured senior notes [Member] 3.350% unsecured senior notes Fed Funds Effective Rate Overnight Index Swap Rate Fed Funds Effective Rate Overnight Index Swap Rate [Member] Payment Type [Domain] Payment Type [Domain] Payment Type [Domain] Range [Domain] Statistical Measurement [Domain] Lease, Cost Lease, Cost [Table Text Block] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Series B Preferred Stock [Member] Series B Cumulative Redeemable Preferred Stock / Unit [Member] Series B Cumulative Redeemable Preferred Stock / Unit [Member] Series B Cumulative Redeemable Preferred Stock / Unit [Member] Excess stock, shares issued Excess Stock, Shares Issued Loan Restructuring Modification [Axis] Loan Restructuring Modification [Axis] Real Estate Real Estate, Policy [Policy Text Block] Other Liabilities, Current Other Liabilities, Current Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Allocated net income for the period Net income allocable to general and limited partner units Net Income Allocable To General And Limited Partner Units Lessee, Finance Lease, Discount Rate Lessee, Finance Lease, Discount Rate All Trading Arrangements All Trading Arrangements [Member] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Computation Of Basic And Diluted Earnings Per Share / Unit Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Vesting Period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Interest rate swaps recorded upon consolidation Interest rate swaps recorded upon consolidation Interest rate swaps recorded upon consolidation Variable Interest Entity, Primary Beneficiary [Member] Variable Interest Entity, Primary Beneficiary [Member] Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Preferred Stock, Redemption Date Preferred Stock, Redemption Date Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Derivative [Line Items] Derivative [Line Items] Debt Instrument, Covenant Compliance Debt Instrument, Covenant Compliance Area of Land Area of Land Weighted average price (per unit) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instrument Other than Option, Nonvested, Intrinsic Value Value of MYLTIP Awards Value of MYLTIP Awards Value of MYLTIP Awards Pay vs Performance Disclosure [Line Items] Unconsolidated Joint Ventures [Member] Unconsolidated Joint Ventures [Member] Unconsolidated Joint Ventures [Member] Redeemable deferred stock units— 128,584 and 119,471 units outstanding at redemption value at June 30, 2024 and December 31, 2023, respectively Redeemable Noncontrolling Interest, Equity, Carrying Amount Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Annual Aggregate Limit of Earthquake Insurance Seattle Annual Aggregate Limit of Earthquake Insurance Seattle Annual Aggregate Limit of Earthquake Insurance Seattle Derivative [Table] Derivative [Table] Lessee, finance lease, payment increase (decrease) frequency (in years) Lessee, finance lease, payment increase (decrease) frequency (in years) Lessee, finance lease, payment increase (decrease) frequency (in years) Distributions Partners' Capital Account, Distributions Boston Properties Limited Partnership Partners' Capital (General and Limited Partners)[Member] Boston Properties Limited Partnership [Member] Boston Properties Limited Partnership Leases of Lessor Disclosure [Text Block] Leases of Lessor Disclosure [Text Block] Other Performance Measure, Amount Other Performance Measure, Amount MYLTIP Units distribution as percentage of OP Unit distribution prior to measurement date Outperformance Awards Long Term Incentive Plan Units Distribution As Percentage Of Op Unit Distribution Prior To Measurement Date Prior to the measurement date on February 5, 2011, 2008 OPP Units will be entitled to receive per unit distributions equal to one-tenth (10%) of the regular quarterly distributions payable on an OP Unit, but will not be entitled to receive any special distributions. 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Three Lessee, Operating Leases Lessee, Operating Leases [Text Block] Common Stock, Shares, Outstanding Equity, shares Equity, shares Common Stock, Shares, Outstanding Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Operating lease costs Operating Lease, Cost MYLTIP 2018 two thousand eighteen MYLTIP [Member] 2018 MYLTIP [Member] Gains on sales of real estate Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Interest on lease liabilities Finance Lease, Interest Expense Colorado Center [Member] Colorado Center [Member] Colorado Center [Member] Net activity from equity transactions Proceeds from Issuance or Sale of Equity Series B Liquidation Preference Per Share/ Unit Preferred Stock, Liquidation Preference Per Share Entity Tax Identification Number Entity Tax Identification Number MYLTIP 2023 MYLTIP Two Thousand Twenty Three [Member] MYLTIP Two Thousand Twenty Three Gain on sales-type lease Gain on sales-type lease Sales-type and Direct Financing Leases, Profit (Loss) Schedule of Long-term Debt Instruments Schedule of Long-Term Debt Instruments [Table Text Block] Mortgage notes payable, net (amounts related to VIEs of $3,279,606 and $3,277,185 at June 30, 2024 and December 31, 2023, respectively) Mortgage notes payable, net Mortgage and notes payable, net Secured Debt Treasury Stock, at cost [Member] Treasury Stock, Common [Member] Business Intersegment, Eliminations [Member] Intersegment Eliminations [Member] Transaction costs Transaction costs Other Cost and Expense, Operating Retail Site [Member] Retail Site [Member] Equity Components [Axis] Equity Components [Axis] Annual aggregate limit of the earthquake insurance which covers San Francisco and Los Angeles regions Annual Aggregate Limit Of Earth Quake Insurance San Francisco and Los Angeles Annual Aggregate Limit Of Earth Quake Insurance San Francisco and Los Angeles Junior Loans Junior Loans [Member] Total expenses Total expenses Costs and Expenses Impaired Long-Lived Assets Held and Used by Type [Axis] Impaired Long-Lived Assets Held and Used by Type [Axis] Outside members’ notes payable contributed to noncontrolling interests in property partnerships Debt Conversion, Original Debt, Amount Investments [Domain] Investments [Domain] Diluted earnings per common share / unit attributable to the Company common shareholders / unitholders Diluted Earnings: Earnings Per Share, Diluted [Abstract] Non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Lessee, Operating Lease, Option to Extend Lessee, Operating Lease, Option to Extend Geographical [Axis] Geographical [Axis] Preferred Stock Redemption Price Per Share, plus accrued and unpaid dividends Preferred Stock Redemption Price Per Share, plus accrued and unpaid dividends Preferred Stock Redemption Price Per Share, plus accrued and unpaid dividends 2029 Lessee, Operating Lease, Liability, to be Paid, Year Five Payment Type [Axis] Payment Type [Axis] Payment Type Weighted Average [Member] Weighted Average [Member] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Land Subject to Ground Leases Land Subject to Ground Leases Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Shares issued pursuant to stock purchase plan, shares Stock Issued During Period, Shares, Employee Stock Purchase Plans San Francisco [Member] San Francisco [Member] San Francisco [Member] Cash and cash equivalents and cash held in escrows, beginning of period Cash and cash equivalents and cash held in escrows, end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Debt, Weighted Average Interest Rate Debt, Weighted Average Interest Rate Unrecognized compensation expenses Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Impairment loss Impairment loss Impairment loss Impairment of Real Estate Consolidation Items [Axis] Consolidation Items [Axis] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Treasury common stock at cost, shares Treasury Stock, Common, Shares Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Cash paid for interest Interest Paid, Including Capitalized Interest, Operating and Investing Activities Product and Service [Domain] Product and Service [Domain] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Value of program trigger Program Trigger Value Program Trigger Value Dock 72 [Member] Dock Seven Two [Member] Dock Seven Two Less: accumulated depreciation (amounts related to VIEs of $(1,570,934) and $(1,501,483) at June 30, 2024 and December 31, 2023, respectively) Less: accumulated depreciation Real Estate Investment Property, Accumulated Depreciation Safeco Plaza REIT LLC Safeco Plaza REIT LLC [Member] Safeco Plaza REIT LLC Boston [Member] Boston [Member] Boston [Member] Residential Building Apartment Building [Member] Preferred stock / units, shares / units outstanding (in shares / units) Preferred Stock, Shares Outstanding Security Exchange Name Security Exchange Name 360 Park South Avenue 360 Park South Avenue [Member] 360 Park South Avenue Debt Instrument, Basis Spread on Variable Rate Debt Instrument, Basis Spread on Variable Rate Non-cash portion of interest expense Paid-in-Kind Interest Company's share of net income (loss) Companys share of net income (loss) Company's share of net income (loss) MYLTIP 2015 [Member] MYLTIP two thousand fifteen [Member] MYLTIP 2015 [Member] Other comprehensive (income) loss attributable to noncontrolling interest Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Shares Issued Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Shares Issued Construction in progress Payments to Acquire Other Productive Assets Commercial Paper, Maximum Borrowing Capacity Commercial Paper, Maximum Borrowing Capacity Commercial Paper, Maximum Borrowing Capacity Lease Contractual Term [Domain] Lease Contractual Term [Domain] Deferred charges, net (amounts related to VIEs of $193,650 and $175,383 at June 30, 2024 and December 31, 2023, respectively) Deferred Costs, Noncurrent Basis differentials Equity Method Investment, Difference Between Carrying Amount and Underlying Equity MYLTIP 2020 [Member] MYLTIP Two Thousand Twenty [Member] MYLTIP Two Thousand Twenty Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Rental Expenses: Total Rental Expenses Operating Expenses Total Rental Expenses Operating Expenses Total. 901 New York Avenue Nine Zero One New York Avenue [Member] Nine Zero One New York Avenue Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award Share-Based Compensation Arrangement by Share-Based Payment Award, Terms of Award Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Proceeds from assignment fee Proceeds from Sale of Intangible Assets Payments for Repurchase of Redeemable Preferred Stock Payments for Repurchase of Redeemable Preferred Stock Annapolis Junction NFM, LLC [Member] Annapolis Junction Nfm Llc [Member] Annapolis Junction NFM LLC [Member] Common stock, shares issued Shares issued Common Stock, Shares, Issued Entity [Domain] Entity [Domain] Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Note receivable, net Financing Receivable, before Allowance for Credit Loss 4.628% unsecured senior notes Four point six two eight percent unsecured senior notes [Member] 4.628% unsecured senior notes unvested MYLTIP distributions as compared to total distributions (percentage) unvested MYLTIP distributions as compared to total distributions (percentage) unvested MYLTIP distributions as compared to total distributions (percentage) Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Podium Developer LLC [Member] Podium Developer LLC [Member] Podium Developer LLC [Member] Tenant and other receivables, net (amounts related to VIEs of $17,481 and $27,987 at June 30, 2024 and December 31, 2023, respectively) Tenant and other receivables, net (amounts related to VIEs of $17,481 and $27,987 at June 30, 2024 and December 31, 2023, respectively) Accounts Receivable, after Allowance for Credit Loss Sales-type Lease, Lease Income Sales-type Lease, Lease Income [Table Text Block] Common stock, shares authorized Common Stock, Shares Authorized Acquisition of real estate (net of cash received upon consolidation) Payments to Acquire Businesses, Net of Cash Acquired Letter of credit and performance obligations Letter Of Credit And Performance Obligation Letter Of Credit And Performance Obligation Period from acquisition through December 31, 2024 Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Entity Voluntary Filers Entity Voluntary Filers Construction Loan Construction Loan Related Party Related Party [Member] 901 New York Avenue LLC (economic ownership) [Member] Bp Crf Nine Zero One New York Avenue Llc (economic percentage)[Member] [Member] Bp Crf Nine Zero One New York Avenue Llc (economic percentage)[Member] [Member] Borrowings on unsecured term loan Proceeds from Other Debt Noncontrolling Interest, Ownership Percentage by Parent Subsidiary, Ownership Percentage, Parent Interest Coverage - Minimum Interest Coverage - Minimum Interest Coverage - Minimum MYLTIP 2020 [Member] two thousand twenty MYLTIPS [Member] [Member] two thousand twenty MYLTIPS [Member] [Member] Impairment loss Asset Impairment Charges Lessee, Operating Lease, Variable Lease Payment, Terms and Conditions Lessee, Operating Lease, Variable Lease Payment, Terms and Conditions Other liabilities Increase (Decrease) in Other Operating Liabilities Total Long-Term Debt Long-Term Debt Assumption of mortgage notes payable Noncash or Part Noncash Acquisition, Debt Assumed Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] 250 Binney Street Two Five Zero Binney Street [Member] Two Five Zero Binney Street 2.984% unsecured senior notes Two point nine eight four percent unsecured senior notes [Member] 2.984% unsecured senior notes Platform 16 Holdings LP [Member] Platform 16 Platform Sixteen [Member] Platform Sixteen [Member] Mortgage Notes Payable Deconsolidated Mortgage Notes Payable Deconsolidated Mortgage Notes Payable Deconsolidated 3.343 % unsecured senior notes Three point three four three percent unsecured senior notes [Member] 3.343% unsecured senior notes [Member] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Lessee, Finance Lease, Remaining Lease Term Lessee, Finance Lease, Remaining Lease Term Commercial Paper Commercial Paper [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Parking and Other [Member] Parking and Other [Member] Parking and Other [Member] Investments in unconsolidated joint ventures Carying value of the Company's investment in unconsolidated joint ventures Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Document Annual Report Document Annual Report Entity Owning Land And Infrastructure Of Project [Member] Entity Owning Land And Infrastructure Of Project [Member] Entity Owning Land And Infrastructure Of Project [Member] Future construction Future construction [Member] Future construction Gain on sale of investment in unconsolidated joint venture Gain (loss) on sale / consolidation Equity Method Investment, Realized Gain (Loss) on Disposal Noncontrolling interests: Noncontrolling Interest Items [Abstract] Interest Expense, Long-Term Debt Interest Expense, Long-Term Debt Risk-free rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 3-Month United States Treasury Bills US Government Securities, at Carrying Value Deferred financing costs Payments of Financing Costs Target Target [Member] Target Noncontrolling interest: Temporary Equity [Abstract] Accounting Policies [Abstract] Accounting Policies [Abstract] Liabilities: Liabilities [Abstract] Revenue Revenues [Abstract] Debt Instrument, Unamortized Discount Debt Instrument, Unamortized Discount Ltips (including vested MYLTIPS) And Restricted Stock [Member] Ltips (including vested MYLTIPS) And Restricted Stock [Member] LTIPs (including vested MYLTIPS) and Restricted Stock [Member]. 500 North Capitol Venture LLC [Member] Five Zero Zero North Capitol Llc [Member] Five Zero Zero North Capitol LLC [Member]. Current Fiscal Year End Date Current Fiscal Year End Date Less: Interest Portion Lessee, Operating Lease, Liability, Undiscounted Excess Amount Number of buildings number of buildings number of buildings PEO Name PEO Name Number of shares issued Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Award Type [Domain] Award Type [Domain] Loan Restructuring Modification [Domain] Loan Restructuring Modification [Domain] Lessee, Operating Lease Payment Increase (Decrease) Term, Year Lessee, Operating Lease Payment Increase (Decrease) Term, Year Lessee, Operating Lease Payment Increase (Decrease) Term, Year Proceeds from mortgage notes payable Proceeds from Issuance of Secured Debt Net activity from stock option and incentive plan, shares Net activity from contributions and unearned compensation Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Non-PEO NEO Non-PEO NEO [Member] Long-term Debt, Maturity Date Long-Term Debt, Maturity Date Net Assets Acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Line of Credit Facility, Expiration Date Line of Credit Facility, Expiration Date Additional Paid-In Capital [Member] Additional Paid-in Capital [Member] Gain on Sale of Investments Gain on Sale of Investments Class of Stock [Line Items] Class of Stock [Line Items] Short-Term Debt [Line Items] Short-Term Debt [Line Items] New Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Platform Sixteen, Three Six Zero Park Avenue South, Two Zero Zero Fifth Avenue and Safeco Plaza Platform Sixteen, Three Six Zero Park Avenue South, Two Zero Zero Fifth Avenue and Safeco Plaza [Member] Platform Sixteen, Three Six Zero Park Avenue South, Two Zero Zero Fifth Avenue and Safeco Plaza Class of Stock [Axis] Class of Stock [Axis] Amortization of interest rate contracts Other Comprehensive Income, Other, Net of Tax Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Line of credit facility, maximum percent for loan advances Line of credit facility, maximum percent for loan advances Line of credit facility, maximum borrowing percentage for loan advances Amortization of right of use assets - operating leases Operating Lease, Right-of-Use Asset, Periodic Reduction Name Measure Name Entity Interactive Data Current Entity Interactive Data Current Low Rise Property Low Rise Property [Member] Low Rise Property Leased percentage Leased percentage Leased percentage 360 PAS Holdco LLC Three Six Zero PAS Holdco LLC [Member] Three Six Zero PAS Holdco LLC Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] US Treasury Bill Securities US Treasury Bill Securities [Member] At The Market Stock Offering Program Aggregate Value Of Common Stock At The Market Stock Offering Program Aggregate Value Of Common Stock At The Market Stock Offering Program, Aggregate Value Of Common Stock Non-cash compensation expense Share-Based Payment Arrangement, Noncash Expense Interest rate swaps Fair Value Hedge Assets Cash Flow Hedge Derivative Instrument Assets at Fair Value Repayments of mortgage notes payable Repayments of Secured Debt Preferred Stock Redemption Premium Preferred Stock Redemption Premium Number of Additional Term Loans Number of Additional Term Loans Number of Additional Term Loans Lessor Disclosure [Abstract] Lessor Disclosure [Abstract] Accounts Receivable, Collection Period Expected Accounts Receivable, Collection Period Expected Accounts Receivable, Collection Period Expected Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Real Estate Properties [Axis] Real Estate Property Ownership [Axis] Sales-type lease origination Sales-type lease origination Sales-type lease origination Supplemental disclosures: Supplemental Cash Flow Information [Abstract] Lessor, Leases Lessor, Leases [Policy Text Block] Diluted Earnings: Net income attributable to the Company Net Income (Loss) Available to Common Stockholders, Diluted Real Estate Properties [Domain] Real Estate Properties [Domain] Ground Lease Ground Lease [Member] Ground Lease Derivative Instruments, Gain (Loss) Derivative Instruments, Gain (Loss) [Table Text Block] Building and other capital improvements Payments for Capital Improvements Series B, Dividend Rate, Percentage Preferred Stock, Dividend Rate, Percentage Interest capitalized Interest Costs Capitalized Skymark Skymark [Member] Skymark Derivative, Number of Instruments Held Derivative, Number of Instruments Held MYLTIP 2022 MYLTIP Two Thousand Twenty Two [Member] MYLTIP Two Thousand Twenty Two Variable Rate [Domain] Variable Rate [Domain] Total liabilities and equity / capital Liabilities and Equity Subsequent Events Subsequent Events [Text Block] Dividends declared Dividends Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Per occurrence limit for NBCR Coverage Per occurrence limit for NBCR Coverage Per occurrence limit for NBCR Coverage Commercial Real Estate Properties [Member] Commercial Real Estate [Member] Derivative Instruments and Hedging Activities Disclosure Derivative Instruments and Hedging Activities Disclosure [Text Block] Amortization of interest rate contracts Amortization of Deferred Hedge Gains Dividends and distributions Payments of Dividends Base Rental Payment [Member] Base Rental Payment [Member] Base Rental Payment Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Repayments of mezzanine notes payable Repayments of Subordinated Debt Entity Information, Former Legal or Registered Name Entity Information, Former Legal or Registered Name Partners' Capital (General and Limited Partners) [Member] Boston Properties Limited Parntership [Member] Boston Properties Limited Parntership [Member] Rosecrans-Sepulveda Partners 4, LLC Rosecrans-Sepulveda Partners Four, LLC [Member] Rosecrans-Sepulveda Partners Four, LLC Buildings and improvements Investment Building and Building Improvements Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Underlying Security Market Price Change Underlying Security Market Price Change, Percent Individual: Individual [Axis] Line of Credit Facility, Interest Rate Description Line of Credit Facility, Interest Rate Description Accumulated Other Comprehensive Loss [Member] AOCI Attributable to Parent [Member] Proceeds from Secured Notes Payable Proceeds from Secured Notes Payable Expected life assumed to calculate per unit fair value per LTIP unit (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Impairment loss on investment Other than Temporary Impairment Losses, Investments Unvested MYLTIP Units [Member] Unvested MYLTIP Units [Member] Unvested 2018-2020 MYLTIPS[Member] Product and Service [Axis] Product and Service [Axis] Statement [Line Items] Statement [Line Items] Schedule Of Reconciliation Of Net Operating Income To Net Income Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Redemption of OP Unit equivalent to Common Stock (in shares) OP Unit Equivalence To Common Stock One OP Unit is equivalent to one common stock (share). Line of Credit, Additional Borrowing Capacity Line of Credit, Additional Borrowing Capacity Line of Credit, Additional Borrowing Capacity Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Derivative Instruments and Hedging Activities Derivatives, Policy [Policy Text Block] Net Income Available To Common Stockholders After Allocation of Undistributed Earnings to Participating Securities Basic Net Income Loss Available To Common Stockholders After Allocation of Undistributed Earnings to Participating Securities Basic Net Income Loss Available To Common Stockholders After Allocation of Undistributed Earnings to Participating Securities Basic Furniture, Fixtures and Equipment Furniture and Fixtures, Gross Minimum [Member] Minimum [Member] Derivative, Fixed Interest Rate Derivative, Fixed Interest Rate Liabilities, Fair Value Adjustment Notes Payable, Fair Value Disclosure Adoption Date Trading Arrangement Adoption Date Long Term Debt, Renewal Term Long Term Debt, Renewal Term Long Term Debt, Renewal Term Lessee, finance lease, purchase option frequency (in years) Lessee, finance lease, purchase option frequency (in years) Lessee, finance lease, purchase option frequency (in years) Residential Properties [Member] Residential Real Estate [Member] Statement, Business Segments [Axis] Segments [Axis] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Stock Option and Incentive Plan Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block] Derivative Instrument [Axis] Derivative Instrument [Axis] Amount of gain (loss) related to the effective portion recognized in other comprehensive income Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI Debt Long-Term Debt, Gross Capital distributions from unconsolidated joint ventures Proceeds from Equity Method Investment, Distribution, Return of Capital Exercise Price Award Exercise Price Operating Leases, Future Minimum Payments Due Operating Leases, Future Minimum Payments Due Asset Acquisition [Table] Asset Acquisition [Table] Real Estate Properties [Line Items] Real Estate Properties [Line Items] NonControlling Interest Redeemable Partnership Units Common Units Shares Outstanding NonControlling Interest Redeemable Partnership Units Common Units Shares Outstanding NonControlling Interest Redeemable Partnership Units Common Units Shares Outstanding Arrangement Duration Trading Arrangement Duration Scenario, Plan Scenario, Plan [Member] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Lessee, Finance Leases Lessee, Finance Leases [Text Block] Boston Properties Limited Partnership Subsidiaries [Member] Name of Property [Axis] Name of Property [Axis] Equity Offering Costs Equity Offering Costs Policy [Policy Text Block] Equity Offering Costs Policy 767 Venture, LLC [Member] Seven Six Seven Venture Llc [Member] Seven Six Seven Venture LLC [Member] Impaired Long-Lived Assets Held and Used, Asset Name [Domain] Impaired Long-Lived Assets Held and Used, Asset Name [Domain] Extended Maturity Extended Maturity [Member] BNY Tower Holdings LLC [Member] Dock 72 BNY Tower Holdings LLC [Member] BNY Tower Holdings LLC [Member] Interest and other income (loss) Interest and Other Income Interest and other income (loss) Interest and Other Income Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Debt Instrument, Term Debt Instrument, Term Office Tower Developer LLC Office Tower Developer LLC [Member] Office Tower Developer LLC 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Four Lease liabilities - finance leases (amounts related to VIEs of $20,864 and $20,794 at June 30, 2024 and December 31, 2023, respectively) Lease liabilities - finance leases Finance Lease, Liability All Individuals All Individuals [Member] Summary Of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Variable Rate [Axis] Variable Rate [Axis] Entities [Table] Entities [Table] Other Investments Other Investments CA-Colorado Center LLC[Member] Colorado Center CA-Colorado Center LLC [Member] CA-Colorado Center LLC [Member] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Stockholders Equity / Partner Capital [Abstract] Stockholders Equity / Partner Capital [Abstract] Stockholders Equity / Partner Capital [Abstract] Adjustment to reflect redeemable partnership units at redemption value Partners' Capital Account, Redemptions Construction in progress from prepaid expenses and other assets Construction in progress from prepaid expenses and other assets Construction in progress from prepaid expenses and other assets Accrued interest payable Interest Payable Common units of the Operating Partnership Noncontrolling Interest in Operating Partnerships Joint Venture Partner [Member] Joint Venture Partner [Member] Joint Venture Partner [Member] Value Of LTIP Units Issued Value Of LTIP Units Issued Value Of LTIP Units Issued. 3.505% unsecured senior notes Three point five zero five percent unsecured senior notes [Member] 3.505% unsecured senior notes Land Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land MYLTIP MYLTIP [Member] MYLTIP OP Units for redemption (in shares) Stock Redeemed or Called During Period, Shares Related Party [Domain] Related and Nonrelated Parties [Domain] Unsecured debt leverage ratio - maximum Unsecured debt leverage ratio - maximum Unsecured debt leverage ratio - maximum LTIP Units [Member] LTIP Units [Member] LTIP Units [Member]. Investments In Affiliates Subsidiaries Associates And Joint Ventures net Investments In Affiliates Subsidiaries Associates And Joint Ventures net Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. Mortgages [Member] Mortgages [Member] Accrued rental income, net deconsolidated Accrued rental income, net deconsolidated Accrued rental income, net deconsolidated Unrealized gain on non-real estate investments Unrealized Gain (Loss) on non-real estate Investments Unrealized gain on non-real estate investments Unrealized Gain (Loss) on Investments Above Market Lease Intangibles [Member] Above Market Leases [Member] Expected price volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Redemption of operating partnership units to common stock, shares Conversion of redeemable partnership units Stock Issued During Period, Shares, Conversion of Units 2012 OPP and 2013-2021 MYLTIP [Member] 2012 OPP and 2013-2021 MYLTIP [Member] 2012 OPP and 2013-2021 MYLTIP Gains from investments in securities Gain (Loss) on Sale of Investments In-Place Lease Intangibles Leases, Acquired-in-Place [Member] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Statement of Partners' Capital [Abstract] Statement of Partners' Capital [Abstract] Per occurrence limit of the earthquake insurance which covers San Francisco and Los Angeles regions Per Occurrence Limit Of Earth Quake Insurance San Francisco and Los Angeles Per Occurrence Limit Of Earth Quake Insurance San Francisco and Los Angeles Lease Intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles 2.671% unsecured senior notes Two point six seven one percent unsecured senior notes [Member] Two point six seven one percent unsecured senior notes Real Estate [Domain] Real Estate [Domain] Amount of gain (loss) relate do the ineffective portion and amount excluded from effectiveness testing Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net Liabilities for Contingent Guarantees Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Commitments And Contingencies Commitments and Contingencies Disclosure [Text Block] Measure: Measure [Axis] Unconsolidated Properties Unconsolidated Properties [Member] Net activity from stock option and incentive plan, value Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Unvested Restricted stock and LTIP Units [Member] Unvested Restricted stock and LTIP Units [Member] Unvested Restricted stock and LTIP Units [Member] Closing price of common stock (in dollars per share) Share Price 325 Main Street, 355 Main Street, 90 Broadway and Kendall Center Green Garage Properties [Member] Three Two Five Main Street, Three Five Five Main Street, Ninety Broadway and Kendall Center Green Garage Properties [Member] Three Two Five Main Street, Three Five Five Main Street, Ninety Broadway and Kendall Center Green Garage Properties Leverage ratio Leverage ratio Leverage ratio Preferred stock, shares authorized Preferred Stock, Shares Authorized Issuance of restricted securities to employees and non-employee directors Issuance of restricted securities to employees and directors Issuance of restricted securities to employees and directors Entity Emerging Growth Company Entity Emerging Growth Company Common Stock Weighted Average Price (in dollars per share) Common Stock Weighted Average Price Common Stock Weighted Average Price. Weighted Average Number Diluted Shares Outstanding Adjustment (per share) Weighted Average Number Diluted Shares Outstanding Adjustment (per share) Weighted Average Number Diluted Shares Outstanding Adjustment (per share) Debt Instrument, Maturity Date Debt Instrument, Maturity Date Santa Monica Business Park [Member] Santa Monica Business Park [Member] Santa Monica Business Park [Member] Limited Partners' Capital Account, Units Outstanding (in units) Limited Partners' Capital Account, Units Outstanding NonControlling Interest Redeemable Partnership Units Common Units Long Term Incentive Units At Redemption Value Shares Outstanding NonControlling Interest Redeemable Partnership Units Common Units Long Term Incentive Units At Redemption Value Shares Outstanding NonControlling Interest Redeemable Partnership Units Common Units Long Term Incentive Units At Redemption Value Shares Outstanding Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Annual Installments for Vesting Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Annual Installments for Vesting Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Annual Installments for Vesting Right-of-use assets - finance leases Finance Lease, Right-of-Use Asset, after Accumulated Amortization Lessee, Finance Lease, Option to Extend Lessee, Finance Lease, Option to Extend Proceeds from note receivable Proceeds from Mortgage Deposits The Skylyne The Skylyne [Member] The Skylyne Equity Component [Domain] Equity Component [Domain] Preferred stock, par value Preferred Stock, Par or Stated Value Per Share Reconciliation of cash and cash equivalents and cash held in escrow Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents [Abstract] Margin based on borrower's credit rating Margin based on borrower's credit rating [Member] Margin based on borrower's credit rating Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] General and limited partnership interest in the operating partnership (percent) Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Entity Shell Company Entity Shell Company Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Distribution Declared to OP, LTIP, OPP and MYLTIP Units [Table Text Block] Dividends Declared [Table Text Block] Dividends Declared [Table Text Block] Redeemable Preferred Stock Dividends Redeemable Preferred Stock Dividends Statement [Table] Statement [Table] Accounts payable and accrued expenses (amounts related to VIEs of $103,662 and $59,667 at June 30, 2024 and December 31, 2023, respectively) Accounts payable and accrued expenses (amounts related to VIEs of $103,662 and $59,667 at June 30, 2024 and December 31, 2023, respectively) Accounts Payable and Accrued Liabilities 2.524% unsecured senior notes Two point five two four percent unsecured senior notes [Member] Two point five two four percent unsecured senior notes Real Estate Investments, Joint Ventures Real Estate Investments, Joint Ventures Consolidation Items [Domain] Consolidation Items [Domain] Schedule Of Aggregate Principal Payments On Mortgage Notes bxp_ScheduleOfAggregatePrincipalPaymentsOnMortgageNotesTableTextBlock [Table Text Block] bxp_ScheduleOfAggregatePrincipalPaymentsOnMortgageNotesTableTextBlock General Partners' Capital Account, Units Outstanding (in units) General Partners' Capital Account, Units Outstanding Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Debt Instrument, Unused Borrowing Capacity, Amount Percentage Loans and Leases Receivable, Loans in Process, Amount Percentage Loans and Leases Receivable, Loans in Process, Amount Percentage Prepaid expenses and other assets, net deconsolidated Prepaid expenses and other assets, net deconsolidated Prepaid expenses and other assets, net deconsolidated Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Senior Notes Senior Notes [Member] Limited Partner [Member] Limited Partner [Member] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Investments in securities Marketable Securities Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer 2028 Lessee, Operating Lease, Liability, to be Paid, Year Four 601 Lexington Avenue Six Zero One Lexington Avenue [Member] Six Zero One Lexington Avenue [Member] Excess stock, shares authorized Excess Stock, Shares Authorized ABXP Worldgate Investments LLC ABXP Worldgate Investments LLC [Member] ABXP Worldgate Investments LLC 100 Causeway Street [Member] One Hundred Causeway Street [Member] 100 Causeway Street [Member] Payments to Acquire Interest in Joint Venture Payments to Acquire Interest in Joint Venture Asset Acquisition Asset Acquisition [Table Text Block] 2021 Credit Facility and 2023 Unsecured Term Loan [Member] 2021 Credit Facility and 2023 Unsecured Term Loan [Member] 2021 Credit Facility and 2023 Unsecured Term Loan Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Write-off of fully depreciated real estate Write off of fully depreciated real estate Write off of fully depreciated real estate Proceeds from Sale of Equity Method Investments Proceeds from Sale of Equity Method Investments Credit Facility [Axis] Credit Facility [Axis] Long-Term Debt, Fair Value Long-Term Debt, Fair Value Entity Registrant Name Entity Registrant Name Sales-type lease receivable, net Sales-type Lease, Lease Receivable Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Depreciation and amortization Depreciation, Depletion and Amortization Company's share of net operating income from joint ventures Net Operating Income Gross Profit Unsecured debt leverage ratio Unsecured debt leverage ratio Unsecured debt leverage ratio Total Real Estate Investment Property At Cost Including Right of Use Assets Real Estate Investment Property At Cost Including Right of Use Assets Fair Value as of Grant Date Award Grant Date Fair Value Rental Revenue: Class A Office Rental Revenue Class A Office Rental Revenue Class A Office Affiliated Entity Affiliated Entity [Member] Equity / Capital: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Geographical [Domain] Geographical [Domain] 1265 Main Office JV LLC [Member] One Two Six Five Main Office JV LLC [Member] 1265 Main Office JV LLC [Member] Prepaid expenses and other assets (amounts related to VIEs of $14,753 and $11,824 at June 30, 2024 and December 31, 2023, respectively) Prepaid Expense and Other Assets Prepaid Expense and Other Assets Rental Revenue: % of Grand Totals Percentage Of Total Revenue These are percentages not monetary value 651 Gateway Six Five One Gateway [Member] Six Five One Gateway Restatement Determination Date: Restatement Determination Date [Axis] Title of 12(b) Security Title of 12(b) Security Amortization of above and below Market Leases Amortization of above and below Market Leases Common stock, $0.01 par value, 250,000,000 shares authorized, 157,176,741 and 157,019,766 issued and 157,097,841 and 156,940,866 outstanding at June 30, 2024 and December 31, 2023, respectively Common Stock, Value, Issued Common Stock, Value, Issued Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Finance Lease, Interest Payment on Liability Finance Lease, Interest Payment on Liability Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Share-Based Payment Arrangement [Abstract] Property insurance program per occurrence limits Insurance Policy Limit Insurance Policy Limit WP Project Developer LLC [Member] Wp Project Developer Llc [Member] WP Project Developer LLC [Member] Amount of gain (loss) related to the effective portion subsequently reclassified to earnings Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Preferred stock, $0.01 par value, 50,000,000 shares authorized, none issued or outstanding Preferred Stock, Value, Issued Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Net income (loss) attributable to the company (in dollars per share / unit) Earnings Per Share, Basic Noncontrolling interest - property partnerships [Member] Noncontrolling interest - property partnerships [Member] Noncontrolling interest - property partnerships [Member] Real Estate, Other [Member] Real Estate, Other [Member] Real Estate Real Estate Disclosure [Text Block] Repayments of Commercial Paper Repayments of Commercial Paper Lease liabilities - operating leases Operating Lease, Payments Operating Lease, Payments Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Ownership [Domain] Ownership [Domain] Change in real estate included in accounts payable and accrued expenses Capital Expenditures Incurred but Not yet Paid Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Dividends Payable [Line Items] Dividends / Distributions [Line Items] Dividends Payable [Line Items] MYLTIP 2017 [Member] MYLTIP two thousand seventeen [Member] 2017 MYLTIP [Member] Shady Grove Innovation District [Member] Shady Grove Innovation District [Member] Shady Grove Innovation District Proceeds from Issuance of Commercial Paper Proceeds from Issuance of Commercial Paper Distributions of net cash flow from operations of unconsolidated joint ventures Proceeds from Equity Method Investment, Distribution 2025 Finite-Lived Intangible Asset, Expected Amortization, Year One Total partners’ capital Partners' Capital Unsecured line of credit Long-term Line of Credit Long-Term Line of Credit Schedule of Acquired Finite-Lived Intangible Assets by Major Class Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Reallocation of noncontrolling interest Noncontrolling Interest, Increase from Subsidiary Equity Issuance Stock Option And Incentive Plan And Stock Repurchase Plan [Axis] Stock Option And Incentive Plan And Stock Repurchase Plan [Axis] Stock Option And Incentive Plan And Stock Repurchase Plan [Axis] Repayments of outside members’ notes payable Repayments of Notes Payable Finance Lease, Right-of-Use Asset, Reversal from Re-Assessment Finance Lease, Right-of-Use Asset, Reversal from Re-Assessment Finance Lease, Right-of-Use Asset, Reversal from Re-Assessment Number of real estate properties Number of Real Estate Properties Investments In Unconsolidated Joint Ventures Equity Method Investments and Joint Ventures Disclosure [Text Block] Right of use asset - finance lease deconsolidated Right of use asset - finance lease deconsolidated Right of use asset - finance lease deconsolidated Purchase Options, Land Purchase Options, Land Fixed contractual payments Operating Lease, Lease Income, Lease Payments Total revenue Revenues Sum of Coverage Covered by IXP and Excess Coverage for Property and Terrorism Sum of Coverage Covered by IXP and Excess Coverage for Property and Terrorism Sum of Coverage Covered by IXP and Excess Coverage for Property and Terrorism Asset Acquisition, Consideration Transferred Asset Acquisition, Consideration Transferred Entity Address, City or Town Entity Address, City or Town Lessee, Leases Lessee, Leases [Policy Text Block] Share-based Payment Arrangement, Option, Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Redeemable partnership units— 16,454,712 and 16,508,277 common units and 2,681,580 and 2,065,861 long term incentive units outstanding at redemption value at June 30, 2024 and December 31, 2023, respectively Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount Stock based compensation expense Share-Based Payment Arrangement, Expense Per Occurrence Limit of Earthquake Insurance Seattle Per Occurrence Limit of Earthquake Insurance Seattle Per Occurrence Limit of Earthquake Insurance Seattle Coinsurance of program trigger Program Trigger Coinsurance Program Trigger Coinsurance Coverage For Acts Of Terrorism Under TRIA Covered in Excess of Amount Covered by IXP - Terrorism Coverage For Acts Of Terrorism Under TRIA Covered in Excess of Amount Covered by IXP - Terrorism Coverage For Acts Of Terrorism Under TRIA Covered in Excess of Amount Covered by IXP - Terrorism Area of Real Estate Property Area of Real Estate Property Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Effective portion of interest rate contracts Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax Document Fiscal Year Focus Document Fiscal Year Focus Total Office Properties [Member] Total Office Properties [Member] Total Office Properties [Member]. Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Total Assets, Fair Value Disclosure Period from March 28, 2024 - December 31, 2024 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Five Document Period End Date Document Period End Date Schedule of Interest Rate Derivatives Schedule of Interest Rate Derivatives [Table Text Block] Below Market Lease [Member] Below Market Lease [Member] Below Market Lease Proceeds from sale of interest in property partnerships and contributions from noncontrolling interests in property partnerships Proceeds from Noncontrolling Interests Payments on real estate transaction Payments on real estate transaction Payments on real estate transaction Base Rate [Member] Base Rate [Member] Total lease payments Lessee, Operating Lease, Liability, to be Paid Insider Trading Arrangements [Line Items] 3.495% unsecured senior notes Three point four nine five percent unsecured senior notes [Member] 3.495% unsecured senior notes Segment Reconciling Items Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Coverage For Acts Of Terrorism Under TRIA Covered in Excess of Amount Covered by IXP - Property and Terrorism Coverage For Acts Of Terrorism Under TRIA Covered in Excess of Amount Covered by IXP - Property and Terrorism Coverage For Acts Of Terrorism Under TRIA Covered in Excess of Amount Covered by IXP - Property and Terrorism Real Estate [Abstract] Real Estate [Abstract] Debt Instrument, Interest Rate Terms Debt Instrument, Interest Rate Terms 2027 Lessee, Operating Lease, Liability, to be Paid, Year Three Reclassification Reclassification, Comparability Adjustment [Policy Text Block] Document Transition Report Document Transition Report Schedule of Noncontrolling Interest [Table Text Block] Schedule of Noncontrolling Interest [Table Text Block] Schedule of Noncontrolling Interest Unsecured debt interest coverage ratio Unsecured debt interest coverage ratio Unsecured debt interest coverage ratio Deferred Bonus and Profit Sharing Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Deferred Bonus and Profit Sharing Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Investment in non-real estate investments Payments to Acquire Other Investments Entity Current Reporting Status Entity Current Reporting Status Dividends In Excess Of Earnings [Member] Dividends In Excess Of Earnings [Member] Retained Earnings [Member] Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Subsidiary, Ownership Percentage, Noncontrolling Owner Salaries And Related Costs Capitalized Salaries And Related Costs Capitalized Salaries And Related Costs Capitalized Real Estate, Type of Property [Axis] Real Estate, Type of Property [Axis] Straight Line Rent Adjustments Straight Line Rent Adjustments Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Executive Category: Executive Category [Axis] Investments In Unconsolidated Joint Ventures [Abstract] Investments In Unconsolidated Joint Ventures [Abstract] Investments In Unconsolidated Joint Ventures [Abstract] Payments to Acquire Investments Payments to Acquire Investments Treasury Stock Treasury Stock [Policy Text Block] Treasury Stock Investment in unconsolidated joint ventures eliminated upon consolidation Investment in unconsolidated joint ventures eliminated upon consolidation Investment in unconsolidated joint ventures eliminated upon consolidation Income Statement Location [Domain] Statement of Income Location, Balance [Domain] 501 K Street LLC [Member] five zero one K Street LLC [Member] 501 K Street LLC [Member] Issuance of note receivables (including related party) Origination of Notes Receivable from Related Parties Company Selected Measure Name Company Selected Measure Name Amount of earthquake insurance provided by IXP, LLC as direct insurer San Francisco and Los Angeles Amount Of Earthquake Insurance Provided By IXP LLC As Direct Insurer San Francisco and Los Angeles Amount Of Earthquake Insurance Provided By IXP LLC As Direct Insurer San Francisco and Los Angeles