Financial Instruments - Balance Sheet (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Foreign currency contracts [Member] | Other non-current assets
Derivatives, Fair Value [Line Items]
Derivative assets		$ 0.2
Foreign currency contracts [Member] | Prepayments and other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	3.4	5.7
Foreign currency contracts [Member] | Accounts payable and accrued expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	7.4	9.8
Net investment hedge contracts [Member] | Other non-current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 24.3	$ 58.1