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Noncontrolling Interests Common Units Distributions (Details) - $ / shares	Oct. 30, 2020	Jul. 31, 2020	Apr. 30, 2020	Jan. 30, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 30, 2019	Dec. 15, 2020
Dividends Payable [Line Items]
Distributions Payable, Amount Per Unit									$ 0.98
Dividends, Per Unit, Cash Paid	$ 0.98	$ 0.98	$ 0.98	$ 0.98	$ 0.95	$ 0.95	$ 0.95	$ 0.95
Op units and LTIP units
Dividends Payable [Line Items]
Distributions Payable, Amount Per Unit									0.98
Unvested MYLTIP Units [Member]
Dividends Payable [Line Items]
Distributions Payable, Amount Per Unit									0.098
Boston Properties Limited Partnership
Dividends Payable [Line Items]
Distributions Payable, Amount Per Unit									$ 0.98
Dividends, Per Unit, Cash Paid	0.98	0.98	0.98	0.98	0.95	0.95	0.95	0.95
Boston Properties Limited Partnership | Op units and LTIP units
Dividends Payable [Line Items]
Dividends, Per Unit, Cash Paid	0.98	0.98	0.98	0.98	0.95	0.95	0.95	0.95
Boston Properties Limited Partnership | Unvested MYLTIP Units [Member]
Dividends Payable [Line Items]
Dividends, Per Unit, Cash Paid	$ 0.098	$ 0.098	$ 0.098	$ 0.098	$ 0.095	$ 0.095	$ 0.095	$ 0.095

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
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