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Noncontrolling Interests Common Units Distributions (Details) - $ / shares													3 Months Ended
	Oct. 31, 2025	Jul. 31, 2025	Apr. 30, 2025	Jan. 30, 2025	Oct. 31, 2024	Jul. 31, 2024	Apr. 30, 2024	Jan. 30, 2024	Oct. 31, 2023	Jul. 31, 2023	Apr. 28, 2023	Jan. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 18, 2025
Dividends Payable [Line Items]
Distributions Payable, Amount Per Unit															$ 0.70
Dividends, Per Unit, Cash Paid	$ 0.70	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.98
Boston Properties Limited Partnership
Dividends Payable [Line Items]
Distributions Payable, Amount Per Unit															0.70
Dividends, Per Unit, Cash Paid	0.70	0.98	0.98	0.98	0.98	0.98	0.98	0.98	0.98	0.98	0.98	0.98
Boston Properties Limited Partnership | Unvested MYLTIP Units and 2025 OPP Units [Member]
Dividends Payable [Line Items]
Distributions Payable, Amount Per Unit															0.070
Dividends, Per Unit, Cash Paid	0.070	0.098	0.098	0.098	0.098	0.098	0.098	0.098	0.098	0.098	0.098	0.098
Boston Properties Limited Partnership | Op units and LTIP units
Dividends Payable [Line Items]
Distributions Payable, Amount Per Unit															$ 0.70
Dividends, Per Unit, Cash Paid	$ 0.70	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.98

X

- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

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- Definition

The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-3

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