Condensed Consolidation Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustment, tax expense (benefit)	$ (0.9)	$ (0.3)	$ (0.3)	$ (1.8)
Defined benefit retirement plan, tax benefit (expense)	$ (0.1)	(0.3)	(0.2)	(0.2)
Change in cash flow hedging, tax expense (benefit)		$ 0.1	$ (0.3)	$ (0.3)