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Stockholders' Equity / Partners' Capital Stockholders' Equity / Partners' Capital Dividends / Distributions (Details) - $ / shares
Feb. 15, 2018
Jan. 30, 2018
Mar. 15, 2018
Entity Information [Line Items]      
Dividends Payable, Amount Per Share / Unit     $ 0.80
Dividends, Per Share / Unit   $ 0.80  
Boston Properties Limited Partnership      
Entity Information [Line Items]      
Dividends Payable, Amount Per Share / Unit     0.80
Dividends, Per Share / Unit   $ 0.80  
Series B Cumulative Redeemable Preferred Stock [Member]      
Entity Information [Line Items]      
Dividends Payable, Amount Per Share / Unit     $ 32.8125
Dividends, Per Share / Unit $ 32.8125