CONSOLIDATED STATEMENTS OF INCOME (LOSS) AND COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Currency translation adjustment, tax expense (benefit)	$ (5.1)	$ (2.1)	$ (3.3)
Amortization of pension related costs, tax expense (benefit)	1.3	0.1	1.2
Pension re-measurement, tax expense (benefit)	(3.3)	(42.0)	33.5
Pension settlement, tax expense (benefit)	3.7
Revaluation of derivative financial instrument, tax expense (benefit)	$ (1.0)	$ (2.3)	$ 1.0