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Stockholders' Equity / Partners' Capital Dividends / Distributions (Details) - $ / shares
Nov. 15, 2017
Oct. 31, 2017
Aug. 15, 2017
Jul. 31, 2017
May 15, 2017
Apr. 28, 2017
Feb. 15, 2017
Jan. 30, 2017
Dec. 18, 2017
Dec. 31, 2015
Dividends / Distributions [Line Items]                    
Special dividend / distribution (per share / common unit amount)                   $ 1.25
Common Stock / Unit, Dividends / Distributions, Per Share / Unit, Cash Paid   $ 0.75   $ 0.75   $ 0.75   $ 0.75    
Dividends Payable, Amount Per Share / Unit                 $ 0.80  
Boston Properties Limited Partnership                    
Dividends / Distributions [Line Items]                    
Common Stock / Unit, Dividends / Distributions, Per Share / Unit, Cash Paid   $ 0.75   $ 0.75   $ 0.75   $ 0.75    
Dividends Payable, Amount Per Share / Unit                 0.80  
Series B Cumulative Redeemable Preferred Stock / Unit [Member]                    
Dividends / Distributions [Line Items]                    
Common Stock / Unit, Dividends / Distributions, Per Share / Unit, Cash Paid $ 32.8125   $ 32.8125   $ 32.8125   $ 32.8125      
Dividends Payable, Amount Per Share / Unit                 $ 32.8125