XML 95 R75.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stockholders' Equity / Partners' Capital (Details)
$ / shares in Units, $ in Millions
 12 Months Ended
Jun. 02, 2017
USD ($)
yr
Dec. 31, 2018
$ / shares
shares
Dec. 31, 2017
$ / shares
shares
Dec. 31, 2016
shares
Mar. 27, 2018
$ / shares
Jun. 03, 2014
USD ($)
Class of Stock [Line Items]            
General Partners' Capital Account, Units Outstanding (in units)   1,722,336        
Limited Partners' Capital Account, Units Outstanding   152,736,142        
Common stock, shares outstanding   154,458,478 154,325,286      
Shares of Common Stock issued upon the exercise of options to purchase Common Stock by certain employees   0 6,688 0    
Shares of its Common Stock issued in connection with the redemption of an equal number of OP Units   83,136 495,637      
ATM Program [Member]            
Class of Stock [Line Items]            
At the market stock offering program, aggregate value of common stock | $ $ 600.0         $ 600.0
At Market Stock Offering Program Maximum Length Of Sale In Years | yr 3          
Series B Cumulative Redeemable Preferred Stock / Unit [Member]            
Class of Stock [Line Items]            
Preferred stock, shares outstanding   80,000 80,000      
Preferred Stock, Dividend Rate, Percentage   5.25%        
Series B Liquidation Preference Per Share | $ / shares   $ 2,500.00 $ 2,500   $ 2,500.00  
Depositary shares of Series B Cumulative Redeemable Preferred [Member]            
Class of Stock [Line Items]            
Preferred stock, shares outstanding   8,000,000        
Series B Liquidation Preference Per Share | $ / shares   $ 25.00     $ 25.00  
Boston Properties Limited Partnership            
Class of Stock [Line Items]            
General Partners' Capital Account, Units Outstanding (in units)   1,722,336 1,719,540      
Limited Partners' Capital Account, Units Outstanding   152,736,142 152,605,746      
Shares of its Common Stock issued in connection with the redemption of an equal number of OP Units   83,136 495,637 190,857    
Boston Properties Limited Partnership | Series B Cumulative Redeemable Preferred Stock / Unit [Member]            
Class of Stock [Line Items]            
Preferred stock, shares outstanding   80,000 80,000      
Series B Liquidation Preference Per Share | $ / shares   $ 2,500 $ 2,500