Derivative Instruments and Hedging Activities (Details 2) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Foreign exchange contracts | Other current liabilities
Derivative instruments and hedging activities
Derivative liabilities	$ 7.8	$ 5.1
Embedded derivatives in purchase and delivery contracts | Other current assets
Derivative instruments and hedging activities
Derivative assets	1.7	0.6
Embedded derivatives in purchase and delivery contracts | Other current liabilities
Derivative instruments and hedging activities
Derivative liabilities	1.2	0.4
Fixed price commodity contracts | Other current liabilities
Derivative instruments and hedging activities
Derivative liabilities	$ 0.2	$ 0.2