Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 788.5	$ 736.8	$ 643.0
Unrealized loss from hedge accounting, net of tax	(0.6)	(11.3)	(5.9)
Reclassification of hedge accounting loss to net income, net of tax	6.0	1.7	3.9
Foreign currency translation, net of tax	16.6	22.4	(32.7)
Other comprehensive (loss) income, net of tax	22.0	12.8	(34.7)
Comprehensive income	$ 810.5	$ 749.6	$ 608.3