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Real Estate Schedule of Real Estate Properties (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Real Estate Properties [Line Items] |  |  |
Land |  | $ 5,309,234 | $ 5,318,724
Right-of-use assets - finance leases |  | 372,747 | 372,922
Operating Lease, Right-of-Use Asset |  | 321,063 | 334,767
Land held for future development | [1] | 562,909 | 714,050
Buildings and improvements |  | 17,312,118 | 17,149,702
Tenant improvements |  | 4,042,562 | 3,866,371
Furniture, Fixtures and Equipment |  | 60,353 | 57,136
Construction in progress |  | 1,322,608 | 764,640
Total |  | 29,303,594 | 28,578,312
Less: accumulated depreciation |  | (8,008,908) | (7,528,057)
Total real estate |  | 21,294,686 | 21,050,255
Boston Properties Limited Partnership |  |  |
Real Estate Properties [Line Items] |  |  |
Land |  | 5,215,723 | 5,224,015
Right-of-use assets - finance leases |  | 372,747 | 372,922
Operating Lease, Right-of-Use Asset |  | 321,063 | 334,767
Land held for future development | [1] | 562,909 | 714,050
Buildings and improvements |  | 17,044,157 | 16,878,146
Tenant improvements |  | 4,042,562 | 3,866,371
Furniture, Fixtures and Equipment |  | 60,353 | 57,136
Construction in progress |  | 1,322,608 | 764,640
Total |  | 28,942,122 | 28,212,047
Less: accumulated depreciation |  | (7,875,405) | (7,397,882)
Total real estate |  | $ 21,066,717 | $ 20,814,165
[1] | Includes pre-development costs.

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- Definition Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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- Definition Amount, after accumulated amortization, of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + Details
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- Definition Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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