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Stock Option and Incentive Plan Stock and Units - Vested MYLTIPs (Details) - USD ($)				12 Months Ended
	Jan. 31, 2025	Feb. 01, 2024	Feb. 03, 2023	Dec. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period				4 years
MYLTIP 2022 | Boston Properties Limited Partnership
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Final awards percentage of target	59.00%
Value of MYLTIP Awards	$ 5,400
Forfeitures, in units	177,919
MYLTIP 2021 | Boston Properties Limited Partnership
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
MYLTIP 2020 | Boston Properties Limited Partnership
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Final awards percentage of target			50.00%
Value of MYLTIP Awards			$ 3,800
Forfeitures, in units			152,460
2020-2022 Vested MYLTIPs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting Period				3 years

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