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Derivatives and Risk Management Activities (Details 5) (USD $) In Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2011 | Jun. 30, 2010 | Jun. 30, 2011 | Jun. 30, 2010 | Dec. 31, 2010
Derivatives disclosures |  |  |  |  |
Derivative assets designated as hedging instruments | $ 111 |  | $ 111 |  | $ 81
Derivative assets not designated as hedging instruments | 137 |  | 137 |  | 39
Total derivative assets | 248 |  | 248 |  | 120
Derivative liabilities designated as hedging instruments | (92) |  | (92) |  | (72)
Derivative liabilities not designated as hedging instruments | (127) |  | (127) |  | (78)
Liabilities at fair value | (219) |  | (219) |  | (150)
Net gain (loss) deferred in AOCI | 59 |  | 59 |  |
Net gain (loss) expected to be reclassified to earnings in next 12 months |  |  | 41 |  |
Gain (loss) expected to be reclassified to earnings prior to 2014 |  |  | 13 |  |
Net deferred gain/(loss) recognized in AOCI on derivatives (effective portion) | 52 | 19 | (92) | 14 |
Gain (loss) on discontinued cash flow hedge reclassified to earnings during the year | 1 |  | 1 |  |
Commodity |  |  |  |  |
Derivatives disclosures |  |  |  |  |
Net deferred gain/(loss) recognized in AOCI on derivatives (effective portion) | 48 | 18 | (97) | 14 |
Commodity | Other current assets |  |  |  |  |
Derivatives disclosures |  |  |  |  |
Derivative assets designated as hedging instruments | 97 |  | 97 |  | 71
Derivative assets not designated as hedging instruments | 128 |  | 128 |  | 11
Derivative liabilities designated as hedging instruments | (90) |  | (90) |  | (70)
Derivative liabilities not designated as hedging instruments | (114) |  | (114) |  | (68)
Commodity | Other long-term assets |  |  |  |  |
Derivatives disclosures |  |  |  |  |
Derivative assets designated as hedging instruments | 7 |  | 7 |  |
Derivative assets not designated as hedging instruments | 8 |  | 8 |  | 20
Derivative liabilities designated as hedging instruments | (1) |  | (1) |  | (1)
Derivative liabilities not designated as hedging instruments | (9) |  | (9) |  |
Commodity | Other current liabilities |  |  |  |  |
Derivatives disclosures |  |  |  |  |
Derivative assets not designated as hedging instruments |  |  |  |  | 2
Derivative liabilities designated as hedging instruments |  |  |  |  | (1)
Derivative liabilities not designated as hedging instruments |  |  |  |  | (10)
Interest Rate Contracts |  |  |  |  |
Derivatives disclosures |  |  |  |  |
Net deferred gain/(loss) recognized in AOCI on derivatives (effective portion) | 4 | 1 | 6 | 1 |
Interest Rate Contracts | Other current assets |  |  |  |  |
Derivatives disclosures |  |  |  |  |
Derivative assets designated as hedging instruments | 5 |  | 5 |  | 10
Derivative assets not designated as hedging instruments |  |  |  |  | 4
Interest Rate Contracts | Other long-term assets |  |  |  |  |
Derivatives disclosures |  |  |  |  |
Derivative assets designated as hedging instruments | 2 |  | 2 |  |
Derivative assets not designated as hedging instruments |  |  |  |  | 1
Foreign exchange contracts |  |  |  |  |
Derivatives disclosures |  |  |  |  |
Net deferred gain/(loss) recognized in AOCI on derivatives (effective portion) |  |  | (1) | (1) |
Foreign exchange contracts | Other current assets |  |  |  |  |
Derivatives disclosures |  |  |  |  |
Derivative assets not designated as hedging instruments | 1 |  | 1 |  | 1
Foreign exchange contracts | Other current liabilities |  |  |  |  |
Derivatives disclosures |  |  |  |  |
Derivative liabilities designated as hedging instruments | (1) |  | (1) |  |
Derivative liabilities not designated as hedging instruments | $ (4) |  | $ (4) |  |

X
- Definition The estimated net amount of existing gains (losses) on cash flow hedges at the reporting date expected to be reclassified to earnings within year two and year three following the date of the latest balance sheet presented in the financial statements. + Details
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- Definition Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's increase (decrease) in deferred hedging gains or losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 26 + Details
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- Definition The estimated net amount of existing gains (losses) on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(2) + Details
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- Definition Fair value of a derivative asset (or nonderivative instrument) that is designated and qualifies as a hedging instrument, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 + Details
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- Definition Fair value of a derivative asset that is not designated or qualifying as a hedging instrument, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 + Details
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- Definition Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 + Details
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- Definition The effective portion of gains and losses (net) 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 Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph b -Clause 2 + Details
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- Definition Fair value of a derivative liability (or nonderivative instrument) that is designated and qualifies as a hedging instrument, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 + Details
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- Definition Fair value of a derivative liability that is not designated or qualifying as a hedging instrument, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph a -Clause 1 + Details
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- Definition The amount of gain reclassified into earnings in the period when cash flow hedge is discontinued because it is probable that the original forecasted transactions will not occur by the end of the original period or an additional two month time period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(4) + Details
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