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Derivatives (Details 3) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Derivatives designated as hedging instruments | Commodity contracts | Fair value hedges | Revenue
Gain (loss) on derivative
Realized and Unrealized Gain (Loss) on Hedge	$ 5,518	$ (8,032)	$ 16,205	$ (2,546)
Derivatives designated as hedging instruments | Commodity contracts | Fair value hedges | Cost of revenue
Gain (loss) on derivative
Realized and Unrealized Gain (Loss) on Hedge	(369)	2,249	(7,830)	2,744
Derivatives not designated as hedging instruments | Commodity contracts | Revenue
Gain (loss) on derivative
Realized and Unrealized Gain (Loss)	1,490	(561)	3,048	771
Derivatives not designated as hedging instruments | Commodity contracts | Cost of revenue
Gain (loss) on derivative
Realized and Unrealized Gain (Loss)	2,560	2,392	3,223	2,248
Derivatives designated as hedging instruments | Foreign exchange contracts | Cash flow hedges
Gain (loss) on derivative
Unrealized Gain (Loss) Recorded in Accumulated Other Comprehensive Income (Effective Portion)				1,902
Derivatives designated as hedging instruments | Foreign exchange contracts | Cash flow hedges | Cost of revenue
Gain (loss) on derivative
Realized and Unrealized Gain (Loss)		417		1,210
Derivatives designated as hedging instruments | Foreign exchange contracts | Cash flow hedges | Other (expense) income, net
Gain (loss) on derivative
Realized and Unrealized Gain (Loss)		252		252
Derivatives not designated as hedging instruments | Foreign exchange contracts | Other (expense) income, net
Gain (loss) on derivative
Realized and Unrealized Gain (Loss)	(963)	(560)	(2,872)	382
Derivatives designated as hedging instruments | Foreign exchange contracts. | Cash flow hedges
Gain (loss) on derivative
Unrealized Gain (Loss) Recorded in Accumulated Other Comprehensive Income (Effective Portion)				252
Derivatives designated as hedging instruments | Commodity contracts. | Fair value hedges | Cost of revenue
Gain (loss) on derivative
Realized and Unrealized Gain (Loss) on Hedge	6,665	11,605	(33,594)	8,720
Derivatives designated as hedging instruments | Fair value hedges
Gain (loss) on derivative
Realized and Unrealized Gain (Loss) on Hedge	11,814	5,822		8,918
Derivatives designated as hedging instruments | Fair value hedges | Revenue | Hedged item commitments
Gain (loss) on derivative
Realized and Unrealized Gain (Loss) on Hedged Item	(5,356)	8,306	(16,789)	3,295
Derivatives 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	274	(2,875)	8,311	(3,683)
Derivatives 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	(3,045)	(10,243)	44,296	(5,514)
Derivatives designated as hedging instruments | Fair value hedges | Hedged items
Gain (loss) on derivative
Realized and Unrealized Gain (Loss) on Hedge			(25,219)
Realized and Unrealized Gain (Loss) on Hedged Item	(8,127)	(4,812)	35,818	(5,902)
Derivatives designated as hedging instruments | Cash flow hedges
Gain (loss) on derivative
Realized and Unrealized Gain (Loss)		669		1,462
Unrealized Gain (Loss) Recorded in Accumulated Other Comprehensive Income (Effective Portion)				2,154
Derivatives not designated as hedging instruments
Gain (loss) on derivative
Realized and Unrealized Gain (Loss)	$ 3,087	$ 1,271	$ 3,399	$ 3,401

X

- 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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Balance Type:	debit
Period Type:	duration

X

- 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

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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X

- 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.

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X

- Definition

The effective portion of gains on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624171-113959

Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44C
-Subparagraph b
-Clause 2
-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.

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