Condensed Consolidated Statements Of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustments, tax (expense) benefit	$ 0.0	$ 0.0	$ 0.0	$ 0.0
Net gains (losses) on hedging instruments, tax benefit	3.6	(13.1)	6.6	2.7
Net pension and other post-retirement benefits, tax (expense) benefit	$ (2.1)	$ 1.7	$ (5.5)	$ 0.2