Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 152.9	$ 127.0
Other comprehensive income:
Unrealized (loss) gain from hedge accounting, net of tax	(8.3)
Unrealized (loss) gain from hedge accounting, net of tax		2.7
Reclassification of hedge accounting gain to net income, net of tax	1.5
Reclassification of hedge accounting gain to net income, net of tax		0.5
Foreign currency translation, net of tax	9.9	14.2
Other comprehensive income	3.1	17.4
Comprehensive income	$ 156.0	$ 144.4