Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (200.6)	$ (43.2)
Other comprehensive income (loss), net of taxes:
Recognition of pension items, net of taxes of $(0.2) and $0.2 for the three months ended March 31, 2018 and 2017, respectively	0.6	4.5
Foreign currency translation adjustments, net of taxes of $1.0 and $1.9 for the three months ended March 31, 2018 and 2017, respectively	28.4	55.2
Other comprehensive income, net of taxes	19.1	50.1
Comprehensive (loss) income, net of taxes	(181.5)	6.9
Net Investment Hedge
Unrealized gains (losses) on derivative instruments, net of taxes	(10.7)	(4.9)
Cash Flow Hedge
Unrealized gains (losses) on derivative instruments, net of taxes	$ 0.8	$ (4.7)