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Share-Based Payments (Details 1) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Summary of share based compensation expense associated with different programs        
Subtotal $ 53.9 $ 28.3 $ 158.4 $ 167.6
Capitalized share-based compensation costs (3.2) (2.8) (10.7) (8.4)
Share-based compensation expense included in total costs and expenses 50.7 25.5 147.7 159.2
Market stock units        
Summary of share based compensation expense associated with different programs        
Share-based compensation expense 5.7 7.3 27.0 33.4
Time-vested restricted stock units        
Summary of share based compensation expense associated with different programs        
Share-based compensation expense 28.5 30.4 92.5 94.1
Cash settled performance shares        
Summary of share based compensation expense associated with different programs        
Share-based compensation expense 7.9 (9.5) 12.7 17.5
Performance units        
Summary of share based compensation expense associated with different programs        
Share-based compensation expense 9.1 (2.8) 17.3 11.6
Employee stock purchase plan        
Summary of share based compensation expense associated with different programs        
Share-based compensation expense $ 2.7 $ 2.9 $ 8.9 $ 11.0