XML 57 R42.htm IDEA: XBRL DOCUMENT v3.4.0.3
Equity and Capital (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Noncontrolling Interest [Line Items]      
Common stock authorized for sale under the ATM $ 400.0    
Common stock remained available for issuance under the ATM $ 400.0    
Dividends, per common share $ 0.245 $ 0.225  
Parent Company [Member] | Operating Partnership [Member]      
Noncontrolling Interest [Line Items]      
Ownership percentage 98.20%    
Parent Company [Member] | Certain Members of the Parent Company’s Current and Former Management [Member]      
Noncontrolling Interest [Line Items]      
Ownership percentage 1.80%    
Accounts Payable and Accrued Liabilities [Member]      
Noncontrolling Interest [Line Items]      
Dividends payable $ 75.3   $ 76.0
Common Stock [Member]      
Noncontrolling Interest [Line Items]      
Stock repurchased during period, shares 47,444 12,754