Fair Value of Derivative Financial Instruments, Balance Sheet Classification (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Assets	$ 12.8	$ 26.0
Liabilities	27.1	6.1
Derivatives Designated as Hedges [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Assets	11.0	22.7
Liabilities	19.0	6.1
Derivatives Designated as Hedges [Member] | Foreign Exchange Contracts [Member] | Current Assets [Member]
Derivatives, Fair Value [Line Items]
Assets	10.2	20.4
Derivatives Designated as Hedges [Member] | Foreign Exchange Contracts [Member] | Non-Current Assets [Member]
Derivatives, Fair Value [Line Items]
Assets	0.8	2.3
Derivatives Designated as Hedges [Member] | Foreign Exchange Contracts [Member] | Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liabilities	16.2	5.7
Derivatives Designated as Hedges [Member] | Foreign Exchange Contracts [Member] | Non-Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liabilities	2.8	0.4
Derivatives not Designated as Hedges [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Assets	1.8	3.3
Liabilities	8.1	0
Derivatives not Designated as Hedges [Member] | Foreign Exchange Contracts [Member] | Current Assets [Member]
Derivatives, Fair Value [Line Items]
Assets	1.8	3.3
Derivatives not Designated as Hedges [Member] | Foreign Exchange Contracts [Member] | Non-Current Assets [Member]
Derivatives, Fair Value [Line Items]
Assets	0	0
Derivatives not Designated as Hedges [Member] | Foreign Exchange Contracts [Member] | Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liabilities	7.0	0
Derivatives not Designated as Hedges [Member] | Foreign Exchange Contracts [Member] | Non-Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liabilities	$ 1.1	$ 0