Condensed Consolidated Statements Of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract]
Foreign currency translation adjustments, tax (expense) benefit	$ 0.0	$ 7.9	$ 0.0	$ 7.9
Net gains (losses) on hedging instruments, tax (expense) benefit	(13.1)	14.4	2.7	14.1
Net pensions and other post-retirement benefits, tax (expense) benefit	$ (1.7)	$ 0.2	$ 0.2	$ (0.4)