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Fair Value (Tables) | 12 Months Ended
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Dec. 31, 2011
Fair Value Disclosure Tables [Abstract] |
Fair Value Summary Table |
|  |  |  | December 31,
|  |  |  | 2011 |  | 2010
|  |  |  | Carrying |  | Fair |  | Carrying |  | Fair
|  |  |  | Amount |  | Value |  | Amount |  | Value
|  |  |  | (in millions)
Assets |  |  |  |  |  |  |  |  |  |  |  |
| Marketable securities |  | $ | 1,356 |  | $ | 1,356 |  | $ | 1,760 |  | $ | 1,760
| Derivatives |  |  | 120 |  |  | 120 |  |  | 119 |  |  | 119
|  | Total assets |  | $ | 1,476 |  | $ | 1,476 |  | $ | 1,879 |  | $ | 1,879
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
| Debt |  | $ | 22,573 |  | $ | - |  | $ | 18,788 |  | $ | 20,137
| Derivatives |  |  | 690 |  |  | 690 |  |  | 358 |  |  | 358
|  | Total liabilities |  | $ | 23,263 |  | $ | 690 |  | $ | 19,146 |  | $ | 20,495
Fair Value Hierarchy For Recurring Measurements Table |
|  |  |  | Quoted Market |  | Significant |  |  |  |  |  |
|  |  |  | Prices in Active |  | Other |  | Significant |  |  |
|  |  |  | Market for |  | Observable |  | Unobservable |  | Total
|  |  |  | Identical Assets |  | Inputs |  | Inputs |  | December 31,
|  |  |  | (Level 1) |  | (Level 2) |  | (Level 3) |  | 2011
|  |  |  | (in millions)
Assets |  |  |  |  |  |  |  |  |  |  |  |
| Available-for-sale securities |  | $ | 1 |  | $ | 1,339 |  | $ | - |  | $ | 1,340
| Trading securities |  |  | 12 |  |  | - |  |  | - |  |  | 12
| Derivatives |  |  | 2 |  |  | 52 |  |  | 66 |  |  | 120
|  | Total assets |  | $ | 15 |  | $ | 1,391 |  | $ | 66 |  | $ | 1,472
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
| Derivatives |  | $ | - |  | $ | 476 |  | $ | 214 |  | $ | 690
|  | Total liabilities |  | $ | - |  | $ | 476 |  | $ | 214 |  | $ | 690
|  |  |  | Quoted Market |  | Significant |  |  |  |  |  |
|  |  |  | Prices in Active |  | Other |  | Significant |  |  |
|  |  |  | Market for |  | Observable |  | Unobservable |  | Total
|  |  |  | Identical Assets |  | Inputs |  | Inputs |  | December 31,
|  |  |  | (Level 1) |  | (Level 2) |  | (Level 3) |  | 2010
|  |  |  | (in millions)
Assets |  |  |  |  |  |  |  |  |  |  |  |
| Available-for-sale securities |  | $ | 8 |  | $ | 1,700 |  | $ | 42 |  | $ | 1,750
| Trading securities |  |  | 10 |  |  | - |  |  | - |  |  | 10
| Derivatives |  |  | - |  |  | 58 |  |  | 61 |  |  | 119
|  | Total assets |  | $ | 18 |  | $ | 1,758 |  | $ | 103 |  | $ | 1,879
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
| Derivatives |  | $ | - |  | $ | 346 |  | $ | 12 |  | $ | 358
|  | Total liabilities |  | $ | - |  | $ | 346 |  | $ | 12 |  | $ | 358
Derivatives Level 3 Rollforward Table |
|  |  |  | Year Ended December 31, 2011
|  |  |  | Interest |  | Cross |  | Foreign |  | Commodity |  |
|  |  |  | Rate |  | Currency |  | Currency |  | & Other |  | Total
|  |  | (in millions)
Balance at beginning of period |  | $ | (1) |  | $ | 10 |  | $ | 22 |  | $ | 18 |  | $ | 49
| Total gains (losses) (realized and unrealized): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings(1) |  |  | - |  |  | (4) |  |  | 32 |  |  | (71) |  |  | (43)
|  | Included in other comprehensive income |  |  | (13) |  |  | (37) |  |  | - |  |  | - |  |  | (50)
|  | Included in regulatory assets |  |  | - |  |  | - |  |  | - |  |  | 8 |  |  | 8
| Settlements |  |  | - |  |  | 13 |  |  | (3) |  |  | (8) |  |  | 2
| Transfers of assets (liabilities) into Level 3(2) |  |  | (117) |  |  | - |  |  | - |  |  | - |  |  | (117)
| Transfers of (assets) liabilities out of Level 3(2) |  |  | 3 |  |  | - |  |  | - |  |  | - |  |  | 3
Balance at end of period |  | $ | (128) |  | $ | (18) |  | $ | 51 |  | $ | (53) |  | $ | (148)
Total gains (losses) for the period included in earnings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| attributable to the change in unrealized gains (losses) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| relating to assets and liabilities held at the end of the period |  | $ | - |  | $ | (2) |  | $ | 29 |  | $ | (71) |  | $ | (44)
|  |  |  | Year Ended December 31, 2010
|  |  |  | Interest |  | Cross |  | Foreign |  | Commodity |  |
|  |  |  | Rate |  | Currency |  | Currency |  | & Other |  | Total
|  |  | (in millions)
Balance at beginning of period |  | $ | (12) |  | $ | (12) |  | $ | - |  | $ | 24 |  | $ | -
| Total gains (losses) (realized and unrealized): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Included in earnings(1) |  |  | 1 |  |  | 4 |  |  | 25 |  |  | 21 |  |  | 51
|  | Included in other comprehensive income |  |  | (12) |  |  | 13 |  |  | - |  |  | - |  |  | 1
|  | Included in regulatory assets |  |  | (3) |  |  | - |  |  | - |  |  | 1 |  |  | (2)
| Settlements |  |  | 7 |  |  | 5 |  |  | (1) |  |  | (28) |  |  | (17)
| Transfers of assets (liabilities) into Level 3(2) |  |  | - |  |  | - |  |  | (2) |  |  | - |  |  | (2)
| Transfers of (assets) liabilities out of Level 3(2) |  |  | 18 |  |  | - |  |  | - |  |  | - |  |  | 18
Balance at end of period |  | $ | (1) |  | $ | 10 |  | $ | 22 |  | $ | 18 |  | $ | 49
Total gains (losses) for the period included in earnings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| attributable to the change in unrealized gains (losses) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| relating to assets and liabilities held at the end of the period |  | $ | - |  | $ | 7 |  | $ | 24 |  | $ | 9 |  | $ | 40
Available For Sale Securities Level 3 Rollforward Table |
|  |  |  | Year Ended December 31,
|  |  |  | 2011 |  | 2010
|  |  | (in millions)
Balance at beginning of period(1) |  | $ | 42 |  | $ | 42
| Settlements |  |  | (42) |  |  | -
Balance at end of period |  | $ | - |  | $ | 42
Total gains (losses) for the period included in earnings attributable to the |  |  |  |  |  |
| change in unrealized gains/losses relating to assets held at the |  |  |  |  |  |
| end of the period |  | $ | - |  | $ | -
Fair Value Assets Measured On Nonrecurring Basis Text Block |
|  |  |  |  |  | Year Ended December 31, 2011
|  |  |  | Carrying |  | Fair Value |  | Gross
|  |  |  | Amount |  | Level 1 |  | Level 2 |  | Level 3 |  | (Gain) Loss
|  |  |  | (in millions)
Long-lived assets held and used: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Wind turbines and deposits |  | $ | 161 |  | $ | - |  | $ | 45 |  | $ | - |  | $ | 116
| Tisza II |  |  | 94 |  |  | - |  |  | - |  |  | 42 |  |  | 52
| Kelanitissa |  |  | 66 |  |  | - |  |  | - |  |  | 24 |  |  | 42
| Bohemia |  |  | 14 |  |  | - |  |  | 5 |  |  | - |  |  | 9
Discontinued operations and |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
businesses held for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Edelap, Edes and Central Dique |  |  | 350 |  |  | - |  |  | 4 |  |  | - |  |  | 346
| Carbon reduction projects |  |  | 49 |  |  | - |  |  | - |  |  | - |  |  | 40(1)
| Wind projects |  |  | 22 |  |  | - |  |  | - |  |  | - |  |  | 22
| Borsod(2) |  |  | (9) |  |  | - |  |  | - |  |  | - |  |  | -
| Eastern Energy(2) |  |  | (123) |  |  | - |  |  | - |  |  | - |  |  | -
| Thames(2) |  |  | (7) |  |  | - |  |  | - |  |  | - |  |  | -
| Brazil Telecom businesses |  |  | 142 |  |  | - |  |  | 893 |  |  |  |  |  | (751)
Equity method affiliates: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Yangcheng |  |  | 100 |  |  | - |  |  | - |  |  | 26 |  |  | 74
Goodwill: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Chigen |  |  | 17 |  |  | - |  |  | - |  |  | - |  |  | 17
|  |  |  |  |  | Year Ended December 31, 2010
|  |  |  | Carrying |  | Fair Value |  | Gross
|  |  |  | Amount |  | Level 1 |  | Level 2 |  | Level 3 |  | (Gain) Loss
|  |  |  | (in millions)
Long-lived assets held and used: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Southland (Huntington Beach) |  | $ | 288 |  | $ | - |  | $ | - |  | $ | 88 |  | $ | 200
| Tisza II |  |  | 160 |  |  | - |  |  | - |  |  | 75 |  |  | 85
| Deepwater |  |  | 83 |  |  | - |  |  | - |  |  | 4 |  |  | 79
Discontinued operations and |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
businesses held for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Eastern Energy |  |  | 827 |  |  | - |  |  | - |  |  | - |  |  | 827
| Barka |  |  | 20 |  |  | - |  |  | 124 |  |  | - |  |  | (104)
| Ras Laffan |  |  | 120 |  |  | - |  |  | 226 |  |  | - |  |  | (106)
Goodwill: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Deepwater |  |  | 18 |  |  | - |  |  | - |  |  | - |  |  | 18
| Other |  |  | 3 |  |  | - |  |  | - |  |  | - |  |  | 3

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- Definition Tabular disclosure of assets and liabilities by class, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). The disclosures that may be required or desired include: (a) the fair value measurements recorded during the period and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 33 -Subparagraph a, 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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19296-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income, and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19279-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611 Reference 2: 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=6925170&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 14 -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. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15 -Subparagraph b-d -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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13476-108611 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 10 -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 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13467-108611 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph c(2), d, e, f -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 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph a, c(1), c(2), c(3), d -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 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 19 -Subparagraph a, b, c(1), d(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 Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 820 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19190-110258 + Details
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