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Stockholders' Equity / Partners' Capital (Tables) | 9 Months Ended
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Sep. 30, 2021
Class of Stock [Line Items] |
Dividends Declared [Table Text Block] | The following table presents Boston Properties, Inc.’s dividends per share and Boston Properties Limited Partnership’s distributions per OP Unit and LTIP Unit paid or declared in 2021 and during the nine months ended September 30, 2020:
Record Date |  | Payment Date |  | Dividend (Per Share) |  | Distribution (Per Unit)
September 30, 2021 |  | October 29, 2021 |  | $0.98 |  |  | $0.98 |
June 30, 2021 |  | July 30, 2021 |  | $0.98 |  |  | $0.98 |
March 31, 2021 |  | April 30, 2021 |  | $0.98 |  |  | $0.98 |
December 31, 2020 |  | January 28, 2021 |  | $0.98 |  |  | $0.98 |
September 30, 2020 |  | October 30, 2020 |  | $0.98 |  |  | $0.98 |
June 30, 2020 |  | July 31, 2020 |  | $0.98 |  |  | $0.98 |
March 31, 2020 |  | April 30, 2020 |  | $0.98 |  |  | $0.98 |
December 31, 2019 |  | January 30, 2020 |  | $0.98 |  |  | $0.98 |
Series B Preferred Stock [Member] |
Class of Stock [Line Items] |
Dividends Declared [Table Text Block] | The following table presents Boston Properties, Inc.’s dividends per share on its Series B Preferred Stock paid or declared during 2021 and during the nine months ended September 30, 2020:
Record Date |  | Payment Date |  | Dividend (Per Share)
February 5, 2021 |  | February 16, 2021 |  | $32.8125 |
November 4, 2020 |  | November 16, 2020 |  | $32.8125 |
August 3, 2020 |  | August 17, 2020 |  | $32.8125 |
May 1, 2020 |  | May 15, 2020 |  | $32.8125 |
February 4, 2020 |  | February 18, 2020 |  | $32.8125 |

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