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Other Income and Expense (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Component Of Other Income [Line Items] |  |  |
Total other income | $ 149 | $ 100 | $ 458
Reduction in interest and penalties associated with federal tax debts at Eletropaulo and Sul as a result of the Refis program |  |  | 165
Gross impact of Eletropaulo swap liability gain |  | 62 |
Net impact of Eletropaulo swap liability gain after tax and noncontrolling interests |  | 9 |
Net impact of Eletropaulo tax credit settlement after noncontrolling interests |  |  | 44
Component Of Operating Other Cost And Expense [Line Items] |  |  |
Total other expense | 154 | 234 | 104
Loss recognized on receipt of bonds from the Dominican Republic government. | 18 |  | 13
Par value of Dominican Republic government bonds received. |  |  | 110
Loss on retirement of debt | (62) | (34) | 6
Parent Company |  |  |
Component Of Operating Other Cost And Expense [Line Items] |  |  |
Loss on retirement of debt | 15 |  |
Loss On Sale And Disposal Of Assets [Member] |  |  |
Component Of Operating Other Cost And Expense [Line Items] |  |  |
Total other expense | 68 | 84 | 33
Gener Gas Settlement [Member] |  |  |
Component Of Operating Other Cost And Expense [Line Items] |  |  |
Total other expense | 0 | 72 | 0
Loss On Extinguishment Of Debt [Member] |  |  |
Component Of Operating Other Cost And Expense [Line Items] |  |  |
Total other expense | 62 | 37 | 0
Loss On Extinguishment Of Debt [Member] | IPL Subsidiary [Member] |  |  |
Component Of Operating Other Cost And Expense [Line Items] |  |  |
Total other expense | 36 |  |
Loss On Extinguishment Of Debt [Member] | Gener Subsidiary [Member] |  |  |
Component Of Operating Other Cost And Expense [Line Items] |  |  |
Total other expense | 15 |  |
Wind Generation Transaction Costs [Member] |  |  |
Component Of Operating Other Cost And Expense [Line Items] |  |  |
Total other expense | 0 | 22 | 0
Other Member |  |  |
Component Of Operating Other Cost And Expense [Line Items] |  |  |
Total other expense | 24 | 19 | 71
Gain On Extinguishment Of Tax And Other Liabilities [Member] |  |  |
Component Of Other Income [Line Items] |  |  |
Total other income | 14 | 62 | 168
Tax Credit Settlement [Member] |  |  |
Component Of Other Income [Line Items] |  |  |
Total other income | 31 | 0 | 129
Performance Incentive Fee [Member] |  |  |
Component Of Other Income [Line Items] |  |  |
Total other income | 0 | 0 | 80
Gain on sale of assets |  |  |
Component Of Other Income [Line Items] |  |  |
Total other income | 47 | 12 | 14
Other Income Other [Member] |  |  |
Component Of Other Income [Line Items] |  |  |
Total other income | $ 57 | $ 26 | $ 67

X
- Definition Par value of bonds issued by the Dominican Republic government received to settle existing accounts receivable for the same amount from the government-owned distribution companies. + References No definition available. + Details
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- Definition Loss recognized on receipt of par value bonds issued by the Dominican Republic government to settle existing accounts receivable for the same amount from the government-owned distribution companies. + References No definition available. + Details
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- Definition Other income from a gain recognized on the extinguishment of swap liabilities in Brazil. + References No definition available. + Details
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- Definition Other income from a gain recognized on the extinguishment of swap liabilities in Brazil after tax and noncontrolling interests. + References No definition available. + Details
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- Definition Other income from a gain recognized on the reduction of interest and penalties resulting from the Programa de Recuperacao Fiscal ("Refis") program in Brazil. + References No definition available. + Details
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- Definition Other income from non-income tax credit settlement at a subsidiary after noncontrolling interests. + References No definition available. + Details
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- Definition Amount represents the difference between the fair value of the payments made and the carrying amount of the debt at the time of its extinguishment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12355-112629 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 26 -Paragraph 20, 21 -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 Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12317-112629 + Details
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