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Stockholders' Equity / Partners' Capital Tables (Tables) | 9 Months Ended
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Sep. 30, 2019
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 2019 and during the nine months ended September 30, 2018:
Record Date |  | Payment Date |  | Dividend (Per Share) |  |  | Distribution (Per Unit) |
September 30, 2019 |  | October 31, 2019 |  |  | $0.95 |  |  |  | $0.95 |
June 28, 2019 |  | July 31, 2019 |  |  | $0.95 |  |  |  | $0.95 |
March 29, 2019 |  | April 30, 2019 |  |  | $0.95 |  |  |  | $0.95 |
December 31, 2018 |  | January 30, 2019 |  |  | $0.95 |  |  |  | $0.95 |
September 28, 2018 |  | October 31, 2018 |  |  | $0.95 |  |  |  | $0.95 |
June 29, 2018 |  | July 31, 2018 |  |  | $0.80 |  |  |  | $0.80 |
March 29, 2018 |  | April 30, 2018 |  |  | $0.80 |  |  |  | $0.80 |
December 31, 2017 |  | January 30, 2018 |  |  | $0.80 |  |  |  | $0.80 |
Series B Cumulative Redeemable 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 outstanding Series B Preferred Stock paid or declared during 2019 and during the nine months ended September 30, 2018:
Record Date |  | Payment Date |  | Dividend (Per Share) |
November 1, 2019 |  | November 15, 2019 |  |  | $32.8125 |
August 2, 2019 |  | August 15, 2019 |  |  | $32.8125 |
May 3, 2019 |  | May 15, 2019 |  |  | $32.8125 |
February 4, 2019 |  | February 15, 2019 |  |  | $32.8125 |
November 2, 2018 |  | November 15, 2018 |  |  | $32.8125 |
August 3, 2018 |  | August 15, 2018 |  |  | $32.8125 |
May 4, 2018 |  | May 15, 2018 |  |  | $32.8125 |
February 2, 2018 |  | February 15, 2018 |  |  | $32.8125 |

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