Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statements of Stockholders' Equity
Net income (loss) attributable to redeemable noncontrolling interest	$ 4.9	$ 9.0	$ 13.6
Other comprehensive income (loss) attributable to redeemable noncontrolling interest	$ (18.8)	$ (5.3)	$ (4.8)