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SEC Schedule, Article 12-28, Real Estate and Accumulated Depreciation Roll Forward (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Balance at the beginning of the year $ 27,421,471 $ 25,744,214 $ 24,108,220
Additions to / improvements of real estate 1,210,558 1,811,036 2,228,000
Assets sold/written-off (110,853) (133,779) (592,006)
Balance at the end of the year 28,521,176 27,421,471 25,744,214
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Balance at the beginning of the year 6,841,404 6,260,992 5,848,183
Depreciation expense 754,951 714,191 646,020
Assets sold/written-off (110,853) (133,779) (233,211)
Balance at the end of the year 7,485,502 6,841,404 6,260,992
Boston Properties Limited Partnership      
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate [Roll Forward]      
Balance at the beginning of the year 27,055,206 25,376,700 23,734,833
Additions to / improvements of real estate 1,210,558 1,811,036 2,228,000
Assets sold/written-off (110,853) (132,530) (586,133)
Balance at the end of the year 28,154,911 27,055,206 25,376,700
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation [Roll Forward]      
Balance at the beginning of the year 6,718,037 6,143,384 5,736,240
Depreciation expense 748,143 707,183 638,538
Assets sold/written-off (110,853) (132,530) (231,394)
Balance at the end of the year $ 7,355,327 $ 6,718,037 $ 6,143,384