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Noncontrolling Interests Common Units Distributions (Details) - $ / shares | Jan. 28, 2021 | Apr. 30, 2020 | Jan. 30, 2020 | Mar. 18, 2021
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Dividends Payable [Line Items] |  |  |  |
Distributions Payable, Amount Per Unit |  |  |  | $ 0.98
Dividends, Per Unit, Cash Paid | $ 0.98 | $ 0.98 | $ 0.98 |
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 |
Boston Properties Limited Partnership | Op units and LTIP units |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Distributions Payable, Amount Per Unit |  |  |  | 0.98
Dividends, Per Unit, Cash Paid | 0.98 | 0.98 | 0.98 |
Boston Properties Limited Partnership | Unvested MYLTIP Units [Member] |  |  |  |
Dividends Payable [Line Items] |  |  |  |
Distributions Payable, Amount Per Unit |  |  |  | $ 0.098
Dividends, Per Unit, Cash Paid | $ 0.098 | $ 0.098 | $ 0.098 |

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