Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net Income	$ 66.1	$ 61.7	$ 122.1	$ 129.8
Currency translation adjustments	(21.4)	17.8	(10.6)	(32.8)
Net unrealized pension and other benefit actuarial gains (losses) and prior service credits	1.2	(1.3)	1.5
Net unrealized (losses) gains on financial instruments (net of tax)	(10.8)	10.0	(1.5)	(6.0)
Total other comprehensive (loss) income	(31.0)	26.5	(10.6)	(38.8)
Comprehensive income	$ 35.1	$ 88.2	$ 111.5	$ 91.0