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Derivatives and Risk Management Activities (Details 5) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2012 | Mar. 31, 2011 | Dec. 31, 2011
Derivatives disclosures |  |  |
Asset Derivatives Fair Value | $ 146 |  | $ 187
Liability Derivatives Fair Value | (169) |  | (230)
Net loss deferred in AOCI | (78) |  |
Net gain expected to be reclassified to earnings in next 12 months | 2 |  |
Gain expected to be reclassified to earnings prior to 2015 | 4 |  |
Net deferred gain/(loss) recognized in AOCI on derivatives (effective portion) | 76 | (144) |
Gain (loss) expected to be reclassified to earnings through 2045 | (84) |  |
Broker receivable | 49 |  |
Broker payable |  |  | 7
Initial margin | 74 |  | 52
Variation margin returned/(posted) | 25 |  | 59
Commodity |  |  |
Derivatives disclosures |  |  |
Net deferred gain/(loss) recognized in AOCI on derivatives (effective portion) | 25 | (145) |
Foreign exchange contracts |  |  |
Derivatives disclosures |  |  |
Net deferred gain/(loss) recognized in AOCI on derivatives (effective portion) |  | (1) |
Interest Rate Contracts |  |  |
Derivatives disclosures |  |  |
Net deferred gain/(loss) recognized in AOCI on derivatives (effective portion) | 51 | 2 |
Derivatives designated as hedging instruments |  |  |
Derivatives disclosures |  |  |
Asset Derivatives Fair Value | 101 |  | 94
Liability Derivatives Fair Value | (124) |  | (187)
Derivatives designated as hedging instruments | Commodity | Other current assets |  |  |
Derivatives disclosures |  |  |
Asset Derivatives Fair Value | 87 |  | 72
Liability Derivatives Fair Value | (54) |  | (47)
Derivatives designated as hedging instruments | Commodity | Other long-term assets |  |  |
Derivatives disclosures |  |  |
Asset Derivatives Fair Value | 7 |  | 20
Liability Derivatives Fair Value | (1) |  | (2)
Derivatives designated as hedging instruments | Commodity | Other long-term liabilities |  |  |
Derivatives disclosures |  |  |
Asset Derivatives Fair Value | 3 |  |
Liability Derivatives Fair Value | (3) |  |
Derivatives designated as hedging instruments | Foreign exchange contracts | Other current assets |  |  |
Derivatives disclosures |  |  |
Asset Derivatives Fair Value | 1 |  | 1
Derivatives designated as hedging instruments | Interest Rate Contracts | Other current assets |  |  |
Derivatives disclosures |  |  |
Asset Derivatives Fair Value | 1 |  | 1
Derivatives designated as hedging instruments | Interest Rate Contracts | Other long-term assets |  |  |
Derivatives disclosures |  |  |
Asset Derivatives Fair Value | 2 |  |
Derivatives designated as hedging instruments | Interest Rate Contracts | Other current liabilities |  |  |
Derivatives disclosures |  |  |
Liability Derivatives Fair Value | (1) |  | (24)
Derivatives designated as hedging instruments | Interest Rate Contracts | Other long-term liabilities |  |  |
Derivatives disclosures |  |  |
Liability Derivatives Fair Value | (65) |  | (114)
Derivatives not designated as hedging instruments |  |  |
Derivatives disclosures |  |  |
Asset Derivatives Fair Value | 45 |  | 93
Liability Derivatives Fair Value | (45) |  | (43)
Derivatives not designated as hedging instruments | Commodity | Other current assets |  |  |
Derivatives disclosures |  |  |
Asset Derivatives Fair Value | 44 |  | 87
Liability Derivatives Fair Value | (39) |  | (39)
Derivatives not designated as hedging instruments | Commodity | Other long-term assets |  |  |
Derivatives disclosures |  |  |
Asset Derivatives Fair Value |  |  | 6
Liability Derivatives Fair Value | (6) |  | (3)
Derivatives not designated as hedging instruments | Commodity | Other current liabilities |  |  |
Derivatives disclosures |  |  |
Liability Derivatives Fair Value |  |  | (1)
Derivatives not designated as hedging instruments | Commodity | Other long-term liabilities |  |  |
Derivatives disclosures |  |  |
Asset Derivatives Fair Value | $ 1 |  |

X
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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 or Decrease in deferred hedging gains or losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e653-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6887037&loc=d3e80784-113994 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 26 -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e637-108580 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e681-108580 + Details
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- Definition Fair value of derivative asset, 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 Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959 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 -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 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. + 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 Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959 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 -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 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. + 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 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. + Details
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- Definition The increase (decrease) during the reporting period in money or securities placed with a broker or counterparty as security for a trading or derivative position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -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 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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- Definition The amount of cash or securities placed with a broker or counterparty as security for a trading or derivatives securities position which was partially obtained with funds provided by the broker dealer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8,17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Aggregate amounts payable to broker-dealers and clearing organizations include amounts payable for securities failed to receive, certain deposits received for securities loaned, amounts payable to clearing organizations on open transactions, and floor-brokerage payables. In addition, the net receivable or payable arising from unsettled trades would be reflected in those captions. A broker-dealer that purchases securities, either for its own account or for a customer's account, but does not receive the securities on the settlement date records the amount of money representing the purchase price of the securities, including any accrued interest, as a liability to the selling broker-dealer. This liability is paid when the securities are received by the purchasing broker-dealer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Chapter 4 -Paragraph 80 -Subparagraph Exhibit 4-8, 4 -IssueDate 2006-05-01 -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 AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Chapter 4 -Paragraph 24-31, 35 -IssueDate 2006-05-01 -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 AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Chapter 7 -Paragraph 24, 25 -IssueDate 2006-05-01 -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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