CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Currency translation adjustment, tax expense (benefit)	$ (3.5)	$ 0.2	$ (6.3)	$ (0.4)
Amortization of pension related costs, tax expense (benefit)	(0.3)	0.0	(1.0)	0.0
Revaluation of derivative financial instrument, tax expense (benefit)	$ 0.5	$ 0.4	$ (1.7)	$ (1.4)