Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 48.9	$ 39.3
Total assets of variable interest entities	255.3
Total liabilities of variable interest entities	$ 54.6