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Stockholders' Equity / Partners' Capital Tables (Tables) | 9 Months Ended
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Sep. 30, 2018
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 in 2018:
Record Date |  | Payment Date |  | Dividend (Per Share) |  |  | Distribution (Per Unit) |
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 29, 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 during 2018:
Record Date |  | Payment Date |  | Dividend (Per Share) |
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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