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Stock Option and Incentive Plan Stock and Units (Narrative) (Details) $ / shares in Units, $ in Thousands				3 Months Ended		6 Months Ended
		Feb. 01, 2024 USD ($) shares	Jan. 25, 2024 USD ($) shares	Jun. 30, 2024 USD ($) shares	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued				157,176,741		157,176,741		157,019,766
Stock based compensation expense | $				$ 16,000	$ 14,900	$ 34,500	$ 40,900
Common Stock, Value, Issued | $				$ 1,571		$ 1,571		$ 1,569
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued				83,316		83,316
LTIP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Value Of LTIP Units Issued | $						$ 26,600
MYLTIP 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Value of MYLTIP Awards | $			$ 11,100
MYLTIP 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Final awards percentage of target		112.00%
Value of MYLTIP Awards | $		$ 12,600
Forfeitures, in units		155,625
Unvested Restricted stock and LTIP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Annual Installments for Vesting						4
Boston Properties Limited Partnership | LTIP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued						449,550
Noncontrolling Interest, Outstanding	[1]			2,681,580		2,681,580
Boston Properties Limited Partnership | MYLTIP 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Noncontrolling Interest, Outstanding				330,479		330,479
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award			The 2024 MYLTIP awards consists of three components. Two of the components, each weighted 40%, utilize BXP’s TSR over a three year measurement period as the performance metrics and the third component utilizes a leverage ratio as the performance metric.
Boston Properties Limited Partnership | MYLTIP 2024 | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock available for issuance			330,479
Boston Properties Limited Partnership | MYLTIP 2024 | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock available for issuance			0
Boston Properties Limited Partnership | MYLTIP 2024 | Target
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock available for issuance			165,240
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee and director payment per share (in dollars per share) | $ / shares						$ 0.01
Common Stock, Value, Issued | $				$ 5,300		$ 5,300
Ltips (including vested MYLTIPS) And Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expenses | $				28,900		28,900
Unvested MYLTIP Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expenses | $				$ 100		$ 100
Weighted-average period (years)						2 years 8 months 12 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 666,405 LTIP Units earned by employees under the Company’s multi-year long-term incentive awards granted between 2012 and 2021 (i.e., 2012 OPP and 2013 - 2021 MYLTIP awards).

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