Consolidated Statements Of Comprehensive Income (Loss) (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Unrealized income (loss) on derivative instruments, net of tax (expense) benefit of $(1.1) and $0.6 and $(1.4) and $1.3, respectively	$ 1.1	$ (0.6)	$ 1.4	$ (1.3)
Foreign currency translation adjustments, net of tax (expense) benefit of $(0.1) and $4.2 and $(2.8) and $4.2, respectively	0.1	(4.2)	2.8	(4.2)
Recognition of deferred pension and other post-retirement items, net of tax (expense) benefit of $(2.4) and $0.7 and $(1.5) and $0.8, respectively	$ (2.4)	$ 0.7	$ (1.5)	$ 0.8