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Stock Option and Incentive Plan Stock and Units (Narrative) (Details) $ / shares in Units, $ in Thousands				3 Months Ended
		Jan. 31, 2025 USD ($) shares	Jan. 22, 2025 USD ($) shares	Mar. 31, 2025 USD ($) $ / shares shares	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued				158,402,227		158,253,895
Stock based compensation expense | $				$ 23,000	$ 18,500
Common Stock, Value, Issued | $				$ 1,583		$ 1,582
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued				49,486
LTIP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued, Value, Share-Based Payment Arrangement, before Forfeiture | $				$ 26,000
Unvested Restricted stock and LTIP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expenses | $				$ 36,700
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Annual Installments for Vesting				4
MYLTIP 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period			3 years
Value of MYLTIP Awards | $			$ 12,700
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award			The 2025 MYLTIP awards consist of three components. Two of the components are each weighted 40% and utilize BXP’s TSR and BXP’s diluted Funds from Operations (“FFO”) per share growth, respectively, over a three-year measurement period as the performance metrics and the third component, weighted 20%, utilizes an average leverage ratio as the performance metric.
MYLTIP 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period		3 years
Final awards percentage of target		59.00%
Value of MYLTIP Awards | $		$ 5,400
Boston Properties Limited Partnership | LTIP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued				390,825
Noncontrolling Interest, Outstanding	[1]			2,794,004
Boston Properties Limited Partnership | MYLTIP 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Noncontrolling Interest, Outstanding				354,940
Boston Properties Limited Partnership | MYLTIP 2025 | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock available for issuance			354,940
Boston Properties Limited Partnership | MYLTIP 2025 | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock available for issuance			0
Boston Properties Limited Partnership | MYLTIP 2025 | Target
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock available for issuance			177,470
Boston Properties Limited Partnership | MYLTIP 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forfeitures, in units		177,919
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Value, Issued | $				$ 3,600
Unvested MYLTIP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expenses | $				$ 3,800
Weighted-average period (years)				2 years 9 months 18 days
LTIP and MYLTIP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee and director payment per share (in dollars per share) | $ / shares				$ 0.25
[1] Includes 688,027 LTIP Units earned by employees under the Company’s multi-year long-term incentive awards granted between 2012 and 2022 (i.e., 2012 OPP and 2013 - 2022 MYLTIP awards).

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