Condensed Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net (loss) income	$ (5.9)	$ (1.0)	$ 7.5	$ (38.9)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, net	15.9	(10.8)	21.9	4.7
Unrealized (losses) gains on derivative contracts, net	(3.7)	(1.8)	(5.7)	1.2
Amortization of prior service costs and actuarial losses, net	4.5	3.5	8.4	7.3
Total other comprehensive income (loss), net of tax	16.7	(9.1)	24.6	13.2
Comprehensive income (loss)	$ 10.8	$ (10.1)	$ 32.1	$ (25.7)