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Derivatives (Details 3) (USD $) | 3 Months Ended
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Mar. 31, 2012 | Mar. 31, 2011
Gain (loss) on derivative |  |
Collateral posted and the amount of assets required to be posted | $ 2,300,000 |
Derivatives instruments designated as hedging instruments | Fair value hedges |  |
Gain (loss) on derivative |  |
Realized and Unrealized Gain (Loss) on Hedge | (27,481,000) | (37,033,000)
Derivatives instruments designated as hedging instruments | Fair value hedges | Hedged items |  |
Gain (loss) on derivative |  |
Realized and Unrealized Gain (Loss) on Hedged Item | 29,966,000 | 43,945,000
Derivatives instruments designated as hedging instruments | Fair value hedges | Revenue | Hedged item commitments |  |
Gain (loss) on derivative |  |
Realized and Unrealized Gain (Loss) on Hedged Item | (201,000) | (11,433,000)
Derivatives instruments designated as hedging instruments | Fair value hedges | Cost of revenue | Hedged item commitments |  |
Gain (loss) on derivative |  |
Realized and Unrealized Gain (Loss) on Hedged Item | 739,000 | 8,037,000
Derivatives instruments designated as hedging instruments | Fair value hedges | Cost of revenue | Hedged item inventories |  |
Gain (loss) on derivative |  |
Realized and Unrealized Gain (Loss) on Hedged Item | 29,428,000 | 47,341,000
Derivatives instruments not designated as hedging instruments |  |
Gain (loss) on derivative |  |
Realized and Unrealized Gain (Loss) | 3,584,000 | 312,000
Commodity contracts | Derivatives instruments designated as hedging instruments | Fair value hedges | Revenue |  |
Gain (loss) on derivative |  |
Realized and Unrealized Gain (Loss) on Hedge | 265,000 | 10,687,000
Commodity contracts | Derivatives instruments designated as hedging instruments | Fair value hedges | Cost of revenue |  |
Gain (loss) on derivative |  |
Realized and Unrealized Gain (Loss) on Hedge | (1,417,000) | (7,461,000)
Commodity contracts | Derivatives instruments not designated as hedging instruments | Revenue |  |
Gain (loss) on derivative |  |
Realized and Unrealized Gain (Loss) | (223,000) | 1,558,000
Commodity contracts | Derivatives instruments not designated as hedging instruments | Cost of revenue |  |
Gain (loss) on derivative |  |
Realized and Unrealized Gain (Loss) | 7,021,000 | 663,000
Foreign currency contracts | Derivatives instruments not designated as hedging instruments | Revenue |  |
Gain (loss) on derivative |  |
Realized and Unrealized Gain (Loss) | (1,552,000) |
Foreign currency contracts | Derivatives instruments not designated as hedging instruments | Other income (expense), net |  |
Gain (loss) on derivative |  |
Realized and Unrealized Gain (Loss) | (1,662,000) | (1,909,000)
Commodity contracts. | Derivatives instruments designated as hedging instruments | Fair value hedges | Cost of revenue |  |
Gain (loss) on derivative |  |
Realized and Unrealized Gain (Loss) on Hedge | $ (26,329,000) | $ (40,259,000)

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- Definition The amount recognized in earnings related to the change in fair value during the period of derivative or nonderivative instruments designated as fair value hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The amount recognized in earnings related to the change in fair value during the period of the hedged item in a fair value hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44D -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5618551-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624171-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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