Consolidated Statements Of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income		$ 173.0	$ 140.9	$ 300.0	$ 199.0
Foreign currency translation, net	[1]	(28.9)	19.0	(14.7)	25.5
Unrealized loss from hedge accounting, net	[2]	2.3	(1.2)	5.5	(1.6)
Other comprehensive (loss) income, net		(26.6)	17.8	(9.2)	23.9
Comprehensive income		146.4	158.7	290.8	222.9
Tax expense (benefit) on foreign currency translation		(0.1)	(0.1)	(0.2)	(0.1)
Tax expense (benefit) on unrealized loss from hedge accounting		$ 0.7	$ (0.8)	$ 1.8	$ (1.1)

[1] (1)Net of tax benefit of $0.1 million for both the three months ended June 30, 2018 and 2017, and net of tax benefit of $0.2 million and $0.1 million for the six months ended June 30, 2018 and 2017, respectively.

[2] (2) Net of tax expense of $0.7 million and a tax benefit of $0.8 million for the three months ended June 30, 2018 and 2017, respectively, and net of tax expense of $1.8 million and a tax benefit of $1.1 million for the six months ended June 30, 2018 and 2017, respectively.