Financial Instruments and Risk Management (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Impact on Earnings from Derivative Instruments
Cash Flow Hedge - Reclassified Amount From Other Comprehensive Earnings (Loss)	$ (7.7)	$ (3.3)	$ (14.7)	$ (8.5)
Gain (Loss) on Derivatives Not Designated As Hedge Instruments	1.0	(1.1)	(4.6)	0.1
Amounts reclassified into earnings:
Commodity contracts	8.0	3.3	14.7	7.7
Interest rate contracts		0.3	0.3	0.5
Currency exchange contracts	(0.3)	(0.3)	(0.3)	0.3
Change in fair value of cash flow hedges:
Commodity contracts	9.8	(25.1)	6.7	(44.4)
Interest rate contracts	(0.1)	1.0	(0.4)	0.9
Currency exchange contracts	(1.4)	0.7	(1.2)	3.3
Foreign Currency and tax impacts	(2.1)	2.9	(3.3)	4.9
Changes in accumulated other comprehensive earnings (loss) for effective derivatives	13.9	(17.2)	16.5	(26.8)
Commodity contracts
Impact on Earnings from Derivative Instruments
Cash Flow Hedge - Reclassified Amount From Other Comprehensive Earnings (Loss)	(8.0)	(3.3)	(14.7)	(7.7)
Gain (Loss) on Derivatives Not Designated As Hedge Instruments	0.6	(0.7)	0.8	(1.5)
Interest rate contracts
Impact on Earnings from Derivative Instruments
Cash Flow Hedge - Reclassified Amount From Other Comprehensive Earnings (Loss)		(0.2)	(0.3)	(0.5)
Foreign currency contracts
Impact on Earnings from Derivative Instruments
Cash Flow Hedge - Reclassified Amount From Other Comprehensive Earnings (Loss)	0.3	0.2	0.3	(0.3)
Gain (Loss) on Derivatives Not Designated As Hedge Instruments	(0.5)	3.1	(5.1)	3.4
Equity contracts
Impact on Earnings from Derivative Instruments
Gain (Loss) on Derivatives Not Designated As Hedge Instruments	$ 0.9	$ (3.5)	$ (0.3)	$ (1.8)

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Represents the foreign currency translation adjustments and total tax effect of the change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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The amount of net gains or losses on foreign currency cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings.

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The amount of net gains or losses on interest rate cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings.

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Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss), attributable to parent entity.

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The amount of net gains or losses on price risk cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income.

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Amount of net unrealized gain (loss) related to the change in fair value of foreign currency exchange rate derivatives designated as cash flow hedging instruments. Recorded in accumulated other comprehensive income to the extent that the cash flow hedge is determined to be effective.

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Amount of unrealized gain (loss) related to the increase or decrease in fair value of interest rate derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income to the extent that the cash flow hedge was determined to be effective.

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Amount of unrealized gain (loss) arising from the change in fair value of price risk derivatives designated as cash flow hedging instruments recorded in accumulated other comprehensive income in the period, before taxes, to the extent that the cash flow hedge is determined to be effective.

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