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Noncontrolling Interests Common units distributions (Details) - $ / shares
Jul. 29, 2016
Apr. 29, 2016
Jan. 28, 2016
Sep. 01, 2016
special dividend [Member]        
Dividends Payable [Line Items]        
Distributions made to OP and LTIP units per unit (in dollars per unit)     $ 1.25  
Boston Properties Limited Partnership        
Dividends Payable [Line Items]        
Distributions Declared To OP And LTIP Units Per Unit       $ 0.65
Distributions Declared To MYLTIP Units Per Unit (in dollars per unit)       $ 0.065
Distributions made to OP and LTIP units per unit (in dollars per unit) $ 0.65 $ 0.65 1.90 [1]  
Distribution paid to outperformance awards, MYLTIP Units (in dollars per unit) $ 0.065 $ 0.065 $ 0.065  
[1] Includes a special distribution of $1.25 per unit.