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	$ 61.7	$ 50.6	$ 129.8	$ 100.7
Currency translation adjustments	17.8	0.5	(32.8)	0.9
Net unrealized pension and other benefit actuarial gains (losses) and prior service costs (credits)	(1.3)	(0.3)		(0.3)
Net unrealized gains (losses) on financial instruments (net of tax)	10.0	(0.8)	(6.0)	(2.1)
Total other comprehensive income (loss)	26.5	(0.6)	(38.8)	(1.5)
Comprehensive income	$ 88.2	$ 50.0	$ 91.0	$ 99.2