CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net Income	$ 113.0	$ 107.2
Other comprehensive income, net of tax:
Foreign exchange translation adjustments	9.9	(24.3)
Income (loss) from derivative agreements	(6.7)	2.9
Other comprehensive income (loss)	3.2	(21.4)
Comprehensive income	$ 116.2	$ 85.8