v3.5.0.2
Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Millions
Sep. 30, 2016
Dec. 31, 2015
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts $ 50.2 $ 46.7
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 50,000,000 50,000,000
Preferred stock, shares issued (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 750,000,000 750,000,000
Common stock, shares issued (in shares) 347,700,000 346,000,000
Treasury stock, shares (in shares) 6,900,000 400,000