Consolidated Statements Of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income		$ 183.7	$ 129.3	$ 483.7	$ 328.3
Foreign currency translation, net	[1]	(3.2)	14.0	(17.9)	39.5
Unrealized loss from hedge accounting, net	[2]	0.1	0.3	5.6	(1.4)
Other comprehensive (loss) income, net		(3.1)	14.3	(12.3)	38.1
Comprehensive income		180.6	143.6	471.4	366.4
Tax expense (benefit) on foreign currency translation		0.1	0.3	(0.1)	0.3
Tax expense (benefit) on unrealized loss from hedge accounting		$ 0.0	$ 0.2	$ 1.9	$ (0.9)

[1] Net of tax expense of $0.1 million and tax expense of $0.3 million for the three months ended September 30, 2018 and 2017, respectively, and net of tax benefit of $0.1 million and tax expense of $0.3 million for the nine months ended September 30, 2018 and 2017, respectively.

[2] Net of tax expense of zero and $0.2 million for the three months ended September 30, 2018 and 2017, respectively, and net of tax expense of $1.9 million and tax benefit of $0.9 million for the nine months ended September 30, 2018 and 2017, respectively.