Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income	$ 131.7	$ 95.5	$ 85.9
Other Comprehensive Income (loss), Derivatives Qualifying as Hedges, Net of Tax
Unrealized (loss) income on derivative instruments, net of tax benefit (expense) of $1.0, $(0.7) and $0.8, respectively	(2.3)	1.7	(1.9)
Foreign currency translation:
Foreign currency translation adjustments, net of tax benefit of $5.0, $0.0 and $0.0, respectively	(19.5)	16.8	(136.7)
Other Comprehensive Income (loss) Pension and Other Post-retirement Plans Adjustment Net Of Tax
Recognition of deferred pension and other post-retirement items, net of tax benefit of $5.8, $0.6 and $0.1, respectively	(19.9)	(8.7)	2.0
Other Comprehensive Income (Loss), Net of Tax	(41.7)	9.8	(136.6)
Comprehensive income (loss)	$ 90.0	$ 105.3	$ (50.7)