Fair Value of Derivative Financial Instruments, Balance Sheet Classification (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Assets	$ 9.9	$ 26.0
Liabilities	18.2	6.1
Derivatives Designated as Hedges [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Assets	9.3	22.7
Liabilities	14.1	6.1
Derivatives Designated as Hedges [Member] | Foreign Exchange Contracts [Member] | Current Assets [Member]
Derivatives, Fair Value [Line Items]
Assets	7.3	20.4
Derivatives Designated as Hedges [Member] | Foreign Exchange Contracts [Member] | Non-Current Assets [Member]
Derivatives, Fair Value [Line Items]
Assets	2.0	2.3
Derivatives Designated as Hedges [Member] | Foreign Exchange Contracts [Member] | Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liabilities	12.2	5.7
Derivatives Designated as Hedges [Member] | Foreign Exchange Contracts [Member] | Non-Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liabilities	1.9	0.4
Derivatives not Designated as Hedges [Member] | Foreign Exchange Contracts [Member]
Derivatives, Fair Value [Line Items]
Assets	0.6	3.3
Liabilities	4.1	0
Derivatives not Designated as Hedges [Member] | Foreign Exchange Contracts [Member] | Current Assets [Member]
Derivatives, Fair Value [Line Items]
Assets	0.6	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	4.1	0
Derivatives not Designated as Hedges [Member] | Foreign Exchange Contracts [Member] | Non-Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Liabilities	$ 0	$ 0