CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE (LOSS) INCOME (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Foreign currency translation adjustments, tax expense (benefit)	$ 1.1	$ (5.1)	$ (2.1)
Amortization of pension related costs, tax expense (benefit)		1.3	0.1
Pension re-measurement, tax expense (benefit)	(4.1)	(3.3)	(42.0)
Pension settlement, tax expense (benefit)		3.7
Revaluation of derivative financial instruments, net of reclassifications into earnings, tax expense (benefit)	$ 0.5	$ (1.0)	$ (2.3)