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Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 272
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482987/272-10-50-3

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- Definition

Net rentable area for properties owned.

+ References

No definition available.

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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-Section 50
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Organization (Details) ft² in Millions			9 Months Ended
Organization (Details) ft² in Millions	Sep. 30, 2025 ft² Real_Estate_Properties yr shares	Dec. 31, 2024	Sep. 30, 2025 ft² Real_Estate_Properties yr shares
Real Estate Properties [Line Items]
Restriction on redemption of OP units from date of issuance (years) \| yr	1		1
One OP unit is equivalent to one share of Common Stock (in shares) \| shares	1		1
OP unit conversion rate (in shares) \| shares	1		1
LTIP Unit Conversion Rate \| shares	1		1
2012 OPP Units and Vested MYLTIPs
Real Estate Properties [Line Items]
Vesting Period			3 years
Construction in Progress
Real Estate Properties [Line Items]
Number of real estate properties	8		8
Net Rentable Area (in sf) \| ft²	3.5		3.5
Commercial Real Estate Properties [Member]
Real Estate Properties [Line Items]
Number of real estate properties	187		187
Net Rentable Area (in sf) \| ft²	54.6		54.6
Office and Life Sciences Building [Member]
Real Estate Properties [Line Items]
Number of real estate properties	163		163
Office and Life Sciences Building [Member] \| Construction in Progress
Real Estate Properties [Line Items]
Number of real estate properties	4		4
Retail Site [Member]
Real Estate Properties [Line Items]
Number of real estate properties	14		14
Retail Site [Member] \| Construction in Progress
Real Estate Properties [Line Items]
Number of real estate properties	1		1
Residential Building
Real Estate Properties [Line Items]
Number of real estate properties	9		9
Residential Building \| Construction in Progress
Real Estate Properties [Line Items]
Number of real estate properties	3		3
Hotel [Member]
Real Estate Properties [Line Items]
Number of real estate properties	1		1
Boston Properties Limited Partnership
Real Estate Properties [Line Items]
General and limited partnership interest in the operating partnership (percent)	89.60%	89.70%