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Noncontrolling Interests Common Units Distributions (Details) - Boston Properties Limited Partnership - $ / shares | Apr. 30, 2020 | Jan. 30, 2020 | Jul. 31, 2019 | Apr. 30, 2019 | Jan. 30, 2019 | Jun. 19, 2020
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Dividends Payable [Line Items] |  |  |  |  |  |
Distributions Declared To OP And LTIP Units Per Unit |  |  |  |  |  | $ 0.98
Distributions Declared To MYLTIP Units Per Unit |  |  |  |  |  | $ 0.098
Distributions made to OP and LTIP units per unit (in dollars per share) | $ 0.98 | $ 0.98 | $ 0.95 | $ 0.95 | $ 0.95 |
Distributions Made To MYLTIP Units Per Unit | $ 0.098 | $ 0.098 | $ 0.095 | $ 0.095 | $ 0.095 |

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