Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Parentheticals) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Currency translation adjustment, tax	$ (2.6)	$ 0.5
Amortization of pension related costs, tax benefit	0.3	0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Tax	0	0
Revaluation of derivative financial instruments, tax	$ (1.2)	$ (0.6)