Real Estate Schedule of Real Estate Properties (Details) - USD ($) $ in Thousands		Dec. 31, 2021		Dec. 31, 2020
Real Estate Properties [Line Items]
Land		$ 5,061,169		$ 5,069,206
Right-of-use assets - finance leases		237,507		237,393
Right of use assets - operating leases		169,778	[1]	146,406
Land held for future development	[2]	560,355		450,954
Buildings and improvements		14,291,214		13,777,691
Tenant improvements		2,894,025		2,752,880
Furniture, Fixtures and Equipment		51,695		49,606
Construction in progress		894,172		868,773
Total		24,159,915		23,352,909
Less: accumulated depreciation		(5,883,961)		(5,534,102)
Total real estate		18,275,954		17,818,807
Boston Properties Limited Partnership
Real Estate Properties [Line Items]
Land		4,964,986		4,971,990
Right-of-use assets - finance leases		237,507		237,393
Right of use assets - operating leases		169,778	[1]	146,406
Land held for future development	[2]	560,355		450,954
Buildings and improvements		14,014,010		13,498,098
Tenant improvements		2,894,025		2,752,880
Furniture, Fixtures and Equipment		51,695		49,606
Construction in progress		894,172		868,773
Total		23,786,528		22,976,100
Less: accumulated depreciation		(5,772,018)		(5,428,576)
Total real estate		$ 18,014,510		$ 17,547,524

[1] See Note 4.

[2] Includes pre-development costs.