CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net Income	$ 73.7	$ 88.8	$ 180.9	$ 191.4
Other comprehensive income, net of tax:
Foreign exchange translation adjustments	19.6	6.1	(4.7)	4.5
Defined benefit plan adjustments	3.9	0.7	3.9	0.7
Income (loss) from derivative agreements	(1.5)	(0.9)	1.4	(0.9)
Other comprehensive income (loss)	22.0	5.9	0.6	4.3
Comprehensive income	$ 95.7	$ 94.7	$ 181.5	$ 195.7