v2.4.0.6

Derivative Instruments Detail 4 (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
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Derivative Instruments Subject to Master Netting Arrangement [Line Items] |  |  |  |
Derivative, Fair Value, Gross Amount Not Offset Against Collateral, Net | $ (221) |  | $ (213) |
Derivative, Fair Value, Amount Subject to Master Netting Arrangement, Net, Total | 0 |  | 0 |
Derivative, Collateral, Obligation to Return Cash | (1) | [1],[2] | (11) | [1],[2]
Derivative Asset, Fair Value, Amount Offset Against Collateral | 40 |  | 34 |
Margin/Cash (Received) Posted Subject to Master Netting Arrangement | 62 | [3] | 39 | [3]
Derivative Liability, Fair Value, Amount Offset Against Collateral | (199) |  | (208) |
Derivative, Fair Value, Amount Offset Against Collateral, Net | (159) |  | (174) |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | (884) |  | (650) |
Derivative Liability, Fair Value, Amount Subject to Master Netting Arrangement | 622 |  | 396 |
Derivative, Collateral, Right to Reclaim Cash | 63 | [3] | 46 | [3]
Derivative, Collateral, Right to Reclaim Cash | 257 | [1] | 196 | [1]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral | 663 |  | 437 |
Derivative Asset, Fair Value, Amount Subject to Master Netting Arrangement | (622) |  | (396) |
Derivative, Collateral, Obligation to Return Cash | (1) | [3] | (7) | [3]
Commodity Futures Contracts Assets, Fair Value Disclosure | (594) |  | (385) |
Commodity Forward Contracts Assets, Fair Value Disclosure | (64) | [4] | (48) | [4]
Interest Rate Swap Assets, Fair Value Disclosure | 5 |  | 4 |
Assets, Fair Value Disclosure | 2,044 |  | 2,135 |
Commodity Futures Contracts Liabilities, Fair Value Disclosure | (655) |  | (424) |
Commodity Forward Contracts Liabilities, Fair Value Disclosure | (41) | [4] | (26) | [4]
Interest Rate Swap Liabilities, Fair Value Disclosure | 188 |  | 200 |
Liabilities, Fair Value Disclosure | 885 |  | 661 |
Commodity Exchange Traded Futures and Swaps Contracts [Member] |  |  |  |
Derivative Instruments Subject to Master Netting Arrangement [Line Items] |  |  |  |
Derivative Asset, Fair Value, Amount Offset Against Collateral | 0 |  | 0 |
Derivative Liability, Fair Value, Amount Offset Against Collateral | 0 |  | 0 |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | (655) |  | (424) |
Derivative Liability, Fair Value, Amount Subject to Master Netting Arrangement | 593 |  | 379 |
Derivative, Collateral, Right to Reclaim Cash | 62 | [3] | 45 | [3]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral | 594 |  | 385 |
Derivative Asset, Fair Value, Amount Subject to Master Netting Arrangement | (593) |  | (379) |
Derivative, Collateral, Obligation to Return Cash | (1) | [3] | (6) | [3]
Commodity Forward Contract [Member] |  |  |  |
Derivative Instruments Subject to Master Netting Arrangement [Line Items] |  |  |  |
Derivative Asset, Fair Value, Amount Offset Against Collateral | 35 |  | 30 |
Derivative Liability, Fair Value, Amount Offset Against Collateral | (11) |  | (8) |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | (41) |  | (26) |
Derivative Liability, Fair Value, Amount Subject to Master Netting Arrangement | 29 |  | 17 |
Derivative, Collateral, Right to Reclaim Cash | 1 | [3] | 1 | [3]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral | 64 |  | 48 |
Derivative Asset, Fair Value, Amount Subject to Master Netting Arrangement | (29) |  | (17) |
Derivative, Collateral, Obligation to Return Cash | 0 | [3] | (1) | [3]
Interest Rate Swap [Member] |  |  |  |
Derivative Instruments Subject to Master Netting Arrangement [Line Items] |  |  |  |
Derivative Asset, Fair Value, Amount Offset Against Collateral | 5 |  | 4 |
Derivative Liability, Fair Value, Amount Offset Against Collateral | (188) |  | (200) |
Derivative Liability, Fair Value, Amount Not Offset Against Collateral | (188) |  | (200) |
Derivative Liability, Fair Value, Amount Subject to Master Netting Arrangement | 0 |  | 0 |
Derivative, Collateral, Right to Reclaim Cash | 0 | [3] | 0 | [3]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral | 5 |  | 4 |
Derivative Asset, Fair Value, Amount Subject to Master Netting Arrangement | 0 |  | 0 |
Derivative, Collateral, Obligation to Return Cash | 0 | [3] | 0 | [3]
Fair Value, Inputs, Level 3 [Member] |  |  |  |
Derivative Instruments Subject to Master Netting Arrangement [Line Items] |  |  |  |
Derivative, Collateral, Obligation to Return Cash | 0 |  | 0 |
Derivative, Collateral, Right to Reclaim Cash | 0 |  | 0 |
Commodity Futures Contracts Assets, Fair Value Disclosure | 0 |  | 0 |
Commodity Forward Contracts Assets, Fair Value Disclosure | (21) | [4] | (24) | [4]
Interest Rate Swap Assets, Fair Value Disclosure | 0 |  | 0 |
Assets, Fair Value Disclosure | 21 |  | 24 |
Commodity Futures Contracts Liabilities, Fair Value Disclosure | 0 |  | 0 |
Commodity Forward Contracts Liabilities, Fair Value Disclosure | (8) | [4] | (8) | [4]
Interest Rate Swap Liabilities, Fair Value Disclosure | 0 |  | 0 |
Liabilities, Fair Value Disclosure | $ 8 |  | $ 8 |
[1] | Balances are subject to master netting arrangements and presented on a gross basis on our Consolidated Condensed Balance Sheets. We do not offset fair value amounts recognized for derivative instruments executed with the same counterparty under a master netting arrangement for financial statement presentation, and we do not offset amounts recognized for the right to reclaim, or the obligation to return, cash collateral with corresponding derivative instrument fair values.
[2] | Included in other current liabilities on our Consolidated Condensed Balance Sheets.
[3] | Negative balances represent margin deposits posted with us by our counterparties related to our derivative activities that are subject to a master netting arrangement. Positive balances reflect margin deposits and natural gas and power prepayments posted by us with our counterparties related to our derivative activities that are subject to a master netting arrangement. See Note 6 for a further discussion of our collateral.
[4] | Includes OTC swaps and options.

X
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- Definition Derivative, Collateral, Right to Reclaim Cash, Net + References No definition available. + Details
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- Definition Derivative, Fair Value, Amount Subject to Master Netting Arrangement, Net, Total + References No definition available. + Details
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- Definition Derivative Liability, Fair Value, Amount Subject to Master Netting Arrangement + References No definition available. + Details
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- Definition Interest Rate Swap Assets, Fair Value Disclosure + References No definition available. + Details
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- Definition Interest Rate Swap Liabilities, Fair Value Disclosure + References No definition available. + Details
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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition The amount of the obligation to return cash collateral under master netting arrangements that have not been offset against net derivative instrument positions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41678-113959 + Details
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- Definition The amount of the right to reclaim cash collateral under master netting arrangements that have not been offset against net derivative instrument positions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41678-113959 + Details
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- Definition The net amount as of the balance sheet date of the fair value of derivative assets and derivative liabilities that in accordance with the entity's accounting policy were offset against collateral under a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41678-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FIN39-1 -Paragraph 10B -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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- Definition The net amount as of the balance sheet date of the fair value of derivative assets and derivative liabilities that in accordance with the entity's accounting policy were not offset against collateral under a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41678-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FIN39-1 -Paragraph 10B -Subparagraph a -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 as of the balance sheet date of the fair value of derivative assets that in accordance with the entity's accounting policy was not offset against an obligation to return cash collateral under a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41678-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FIN39-1 -Paragraph 10B -Subparagraph a -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 as of the balance sheet date of the fair value of derivative assets that in accordance with the entity's accounting policy was offset against an obligation to return cash collateral under a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41678-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FIN39-1 -Paragraph 10B -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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- Definition The amount as of the balance sheet date of the fair value of derivative liabilities that in accordance with the entity's accounting policy was not offset against the right to reclaim cash collateral under a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41678-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FIN39-1 -Paragraph 10B -Subparagraph a -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 as of the balance sheet date of the fair value of derivative liabilities that in accordance with the entity's accounting policy were offset against the right to reclaim cash collateral under a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41678-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FIN39-1 -Paragraph 10B -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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- Definition This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + 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 This element represents money paid in advance to protect the provider of a product or service, such as a lessor, against damage or nonpayment by the buyer or tenant (lessee) during the term of the agreement. Such damages may include physical damage to the property, theft of property, and other contractual breaches. Security deposits held may be interest or noninterest bearing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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