UNAUDITED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Currency translation adjustment, tax expense (benefit)	$ 0.5	$ 0.2	$ 0.6	$ (2.8)
Amortization of pension related costs, tax expense (benefit)	0.4	0.4	0.7	0.7
Revaluation of derivative financial instrument, tax expense (benefit)	$ 0.1	$ 0.0	$ (0.4)	$ (1.2)