Derivatives and Fair Value Measurements (Details 2) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Current Assets	$ 278.4	$ 313.8
Noncurrent Assets	30.1	240.7
Current Liabilities	8.5	11.4
Noncurrent Liabilities	9.1	19.5
Commodity swaps and options [Member] \| Cash flow hedges [Member]
Derivatives, Fair Value [Line Items]
Current Assets	18.3	43.4
Noncurrent Assets	2.5	11.7
Current Liabilities	8.5	7.1
Noncurrent Liabilities	8.3	15.0
Foreign currency contracts [Member] \| Cash flow hedges [Member]
Derivatives, Fair Value [Line Items]
Current Assets	260.1	270.4
Noncurrent Assets	27.6	229.0
Current Liabilities	0	4.3
Noncurrent Liabilities	$ 0.8	$ 4.5

Fair values as of the balance sheet date for all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments and which are expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer, net of the effects of master netting arrangements.

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Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments which are expected to exist longer than one year or beyond the normal operating cycle, if longer, net of the effects of master netting arrangements.

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Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and which are expected to be extinguished or otherwise disposed of within a year or the normal operating cycle, if longer, net of the effects of master netting arrangements.

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Fair values as of the balance sheet date of all liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments, and which are expected to be extinguished or otherwise disposed of after one year or beyond the normal operating cycle, if longer, net of the effects of master netting arrangements.

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