Consolidated Statements Of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Unrealized (loss) income on derivative instruments, net of tax benefit (expense) of $0.3 and $0.2 and $(1.1) and $1.5, respectively	$ (0.3)	$ (0.2)	$ 1.1	$ (1.5)
Foreign currency translation adjustments, net of tax (expense) benefit of $1.2 and $0.4 and $(1.6) and $4.6, respectively	(1.2)	(0.4)	1.6	(4.6)
Recognition of deferred pension and other post-retirement items, net of tax (expense) benefit of $(0.4) and $0.6 and $(1.9) and $1.4, respectively	$ (0.4)	$ 0.6	$ (1.9)	$ 1.4