Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 44.7	$ 39.3
Total assets of variable interest entities	247.3
Total liabilities of variable interest entities	$ 54.0