Financial Instruments - Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Foreign currency | Prepayments and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	$ 6.0	$ 3.7
Foreign currency | Other non-current assets
Derivatives, Fair Value [Line Items]
Derivative assets	0.1	0.1
Foreign currency | Accounts payable and accrued expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	3.1	2.4
Foreign currency | Other non-current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0.0	0.5
Commodity contracts | Prepayments and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	0.0	0.0
Commodity contracts | Accounts payable and accrued expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 0.1	$ 0.0