Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net Income	$ 56.0	$ 68.1
Currency translation adjustments	10.8	(50.6)
Net unrealized pension and other benefit actuarial losses and prior service credits	0.3	1.3
Net unrealized gains (losses) on financial instruments (net of tax)	9.3	(16.0)
Total other comprehensive income (loss)	20.4	(65.3)
Comprehensive income	$ 76.4	$ 2.8