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Derivative Instruments and Hedging Activities (Tables) | 12 Months Ended
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Dec. 31, 2011
Derivative Instruments And Hedging Activities Tables [Abstract] |
Interest Rate Derivatives By Type Table |
|  |  | December 31, 2011
|  |  | Current |  | Maximum(1) |  |  |  |
|  |  |  |  | Derivative |  |  |  | Derivative |  | Weighted |  | % of Debt
|  |  |  |  | Notional |  |  |  | Notional |  | Average |  | Currently
|  |  | Derivative |  | Translated |  | Derivative |  | Translated |  | Remaining |  | Hedged
Interest Rate Derivatives |  | Notional |  | to USD |  | Notional |  | to USD |  | Term(1) |  | by Index(2)
|  |  | (in millions) |  | (in years) |  |
LIBOR (U.S. Dollar) |  | 3,628 |  | $ | 3,628 |  | 4,697 |  | $ | 4,697 |  | 11 |  | 67%
EURIBOR (Euro) |  | 673 |  |  | 872 |  | 673 |  |  | 872 |  | 11 |  | 63%
LIBOR (British Pound Sterling) |  | 58 |  |  | 90 |  | 82 |  |  | 128 |  | 13 |  | 87%
Cross Currency Derivatives By Type Table |
|  |  | December 31, 2011
|  |  |  |  |  |  | Weighted |  | % of Debt
|  |  |  |  | Notional |  | Average |  | Currently
|  |  |  |  | Translated |  | Remaining |  | Hedged
Cross Currency Swaps |  | Notional |  | to USD |  | Term(1) |  | by Index(2)
|  |  | (in millions) |  | (in years) |  |
Chilean Unidad de Fomento (CLF) |  | 6 |  | $ | 240 |  | 14 |  | 85%
Foreign Currency Options By Type Table |
|  |  | December 31, 2011
|  |  |  |  |  |  |  |  |  |  | Weighted
|  |  |  |  | Notional |  | Probability |  | Average
|  |  |  |  | Translated |  | Adjusted |  | Remaining
Foreign Currency Options |  | Notional(1) |  | to USD(1) |  | Notional(2) |  | Term(3)
|  |  | (in millions) |  | (in years)
Euro (EUR) |  | 38 |  | $ | 54 |  | $ | 52 |  | <1
Brazilian Real (BRL) |  | 86 |  |  | 52 |  |  | 49 |  | <1
British Pound (GBP) |  | 27 |  |  | 44 |  |  | 35 |  | <1
Philippine Peso (PHP) |  | 414 |  |  | 10 |  |  | 7 |  | <1
Foreign Currency Forwards By Type Table |
|  |  | December 31, 2011 |
|  |  |  |  |  |  |  |  | Weighted |
|  |  |  |  | Notional |  |  | Average |
|  |  |  |  | Translated |  |  | Remaining |
Foreign Currency Forwards |  | Notional |  | to USD |  |  | Term(1) |
|  |  | (in millions) |  |  | (in years) |
Euro (EUR) |  | 113 |  | $ | 154 |  |  | 2 |
Chilean Peso (CLP) |  | 72,169 |  |  | 145 |  |  | <1 |
British Pound (GBP) |  | 11 |  |  | 16 |  |  | <1 |
Argentine Peso (ARS) |  | 61 |  |  | 13 |  |  | <1 |
Colombian Peso (COP) |  | 23,993 |  |  | 13 |  |  | <1 |
Hungarian Forint (HUF) |  | 1,236 |  |  | 5 |  |  | <1 |
Embedded Foreign Currency Derivatives By Type Table |
|  |  | December 31, 2011 |
|  |  |  |  |  |  |  | Weighted |
|  |  |  |  | Notional |  |  | Average |
|  |  |  |  | Translated |  |  | Remaining |
Embedded Foreign Currency Derivatives |  | Notional |  | to USD |  |  | Term(1) |
|  |  | (in millions) |  |  | (in years) |
Philippine Peso (PHP) |  | 13,692 |  | $ | 312 |  |  | 2 |
Argentine Peso (ARS) |  | 938 |  |  | 218 |  |  | 11 |
Kazakhstani Tenge (KZT) |  | 29,635 |  |  | 200 |  |  | 8 |
Euro (EUR) |  | 3 |  |  | 3 |  |  | 9 |
Commodity Non Hedge Derivatives By Type Table |
|  |  | December 31, 2011 |  |
|  |  |  |  | Weighted Average |  |  |  |
| Commodity Derivatives |  | Notional |  | Remaining Term(1) |  |  |  |
|  |  | (in millions) |  | (in years) |  |  |  |
| Natural gas (MMBtu) |  | 31 |  | 12 |  |  |  |
| Petcoke (Metric tons) |  | 13 |  | 12 |  |  |  |
| Aluminum (MWh) |  | 16(2) |  | 8 |  |  |  |
| Heating Oil (Gallons) |  | 3 |  | 1 |  |  |  |
| Coal (Metric tons) |  | 4 |  | 3 |  |  |  |
Fair Value Hierarchy Derivative Assets Liabilities By Balance Sheet Classification Text Block |
|  |  |  |  | December 31, 2011 |  | December 31, 2010
|  |  |  |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
|  |  |  |  | (in millions) |  | (in millions)
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Foreign currency derivatives |  | $ | - |  | $ | 24 |  | $ | 4 |  | $ | 28 |  | $ | - |  | $ | 3 |  | $ | 3 |  | $ | 6
| Commodity and other derivatives |  |  | 2 |  |  | 16 |  |  | 3 |  |  | 21 |  |  | - |  |  | 2 |  |  | 3 |  |  | 5
|  | Total current assets |  |  | 2 |  |  | 40 |  |  | 7 |  |  | 49 |  |  | - |  |  | 5 |  |  | 6 |  |  | 11
Noncurrent assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Interest rate derivatives |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | 49 |  |  | - |  |  | 49
| Cross currency derivatives |  |  | - |  |  | - |  |  | 1 |  |  | 1 |  |  | - |  |  | - |  |  | 12 |  |  | 12
| Foreign currency derivatives |  |  | - |  |  | 3 |  |  | 58 |  |  | 61 |  |  | - |  |  | - |  |  | 27 |  |  | 27
| Commodity and other derivatives |  |  | - |  |  | 9 |  |  | - |  |  | 9 |  |  | - |  |  | 4 |  |  | 16 |  |  | 20
|  | Total noncurrent assets |  |  | - |  |  | 12 |  |  | 59 |  |  | 71 |  |  | - |  |  | 53 |  |  | 55 |  |  | 108
|  |  | Total assets |  | $ | 2 |  | $ | 52 |  | $ | 66 |  | $ | 120 |  | $ | - |  | $ | 58 |  | $ | 61 |  | $ | 119
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Interest rate derivatives |  | $ | - |  | $ | 97 |  | $ | 22 |  | $ | 119 |  | $ | - |  | $ | 118 |  | $ | - |  | $ | 118
| Cross currency derivatives |  |  | - |  |  | - |  |  | 5 |  |  | 5 |  |  | - |  |  | - |  |  | 2 |  |  | 2
| Foreign currency derivatives |  |  | - |  |  | 5 |  |  | 1 |  |  | 6 |  |  | - |  |  | 13 |  |  | - |  |  | 13
| Commodity and other derivatives |  |  | - |  |  | 17 |  |  | 6 |  |  | 23 |  |  | - |  |  | - |  |  | - |  |  | -
|  | Total current liabilities |  |  | - |  |  | 119 |  |  | 34 |  |  | 153 |  |  | - |  |  | 131 |  |  | 2 |  |  | 133
Long-term liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Interest rate derivatives |  |  | - |  |  | 334 |  |  | 106 |  |  | 440 |  |  | - |  |  | 200 |  |  | 1 |  |  | 201
| Cross currency derivatives |  |  | - |  |  | - |  |  | 14 |  |  | 14 |  |  | - |  |  | - |  |  | - |  |  | -
| Foreign currency derivatives |  |  | - |  |  | 10 |  |  | 10 |  |  | 20 |  |  | - |  |  | 15 |  |  | 8 |  |  | 23
| Commodity and other derivatives |  |  | - |  |  | 13 |  |  | 50 |  |  | 63 |  |  | - |  |  | - |  |  | 1 |  |  | 1
|  | Total long-term liabilities |  |  | - |  |  | 357 |  |  | 180 |  |  | 537 |  |  | - |  |  | 215 |  |  | 10 |  |  | 225
|  |  | Total liabilities |  | $ | - |  | $ | 476 |  | $ | 214 |  | $ | 690 |  | $ | - |  | $ | 346 |  | $ | 12 |  | $ | 358
Derivative Assets Liabilities At Fair Value Net By Balance Sheet Classification And Type Table |
|  |  |  |  | December 31, 2011 |  | December 31, 2010
|  |  |  |  |  |  | Not |  |  |  |  |  | Not |  |
|  |  |  |  | Designated |  | Designated |  |  |  |  | Designated |  | Designated |  |  |
|  |  |  |  | as Hedging |  | as Hedging |  |  |  | as Hedging |  | as Hedging |  |
|  |  |  |  | Instruments |  | Instruments |  | Total |  | Instruments |  | Instruments |  | Total
|  |  |  |  | (in millions) |  |  |  |  | (in millions) |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Foreign currency derivatives |  | $ | 10 |  | $ | 18 |  | $ | 28 |  | $ | - |  | $ | 6 |  | $ | 6
| Commodity and other derivatives |  |  | 2 |  |  | 19 |  |  | 21 |  |  | - |  |  | 5 |  |  | 5
|  | Total current assets |  |  | 12 |  |  | 37 |  |  | 49 |  |  | - |  |  | 11 |  |  | 11
Noncurrent assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Interest rate derivatives |  |  | - |  |  | - |  |  | - |  |  | 49 |  |  | - |  |  | 49
| Cross currency derivatives |  |  | 1 |  |  | - |  |  | 1 |  |  | 12 |  |  | - |  |  | 12
| Foreign currency derivatives |  |  | 3 |  |  | 58 |  |  | 61 |  |  | - |  |  | 27 |  |  | 27
| Commodity and other derivatives |  |  | - |  |  | 9 |  |  | 9 |  |  | - |  |  | 20 |  |  | 20
|  | Total noncurrent assets |  |  | 4 |  |  | 67 |  |  | 71 |  |  | 61 |  |  | 47 |  |  | 108
Total assets |  | $ | 16 |  | $ | 104 |  | $ | 120 |  | $ | 61 |  | $ | 58 |  | $ | 119
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Interest rate derivatives |  | $ | 110 |  | $ | 9 |  | $ | 119 |  | $ | 107 |  | $ | 11 |  | $ | 118
| Cross currency derivatives |  |  | 5 |  |  | - |  |  | 5 |  |  | 2 |  |  | - |  |  | 2
| Foreign currency derivatives |  |  | 1 |  |  | 5 |  |  | 6 |  |  | 8 |  |  | 5 |  |  | 13
| Commodity and other derivatives |  |  | - |  |  | 23 |  |  | 23 |  |  | - |  |  | - |  |  | -
|  | Total current liabilities |  |  | 116 |  |  | 37 |  |  | 153 |  |  | 117 |  |  | 16 |  |  | 133
Long-term liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| Interest rate derivatives |  |  | 425 |  |  | 15 |  |  | 440 |  |  | 186 |  |  | 15 |  |  | 201
| Cross currency derivatives |  |  | 14 |  |  | - |  |  | 14 |  |  | - |  |  | - |  |  | -
| Foreign currency derivatives |  |  | - |  |  | 20 |  |  | 20 |  |  | - |  |  | 23 |  |  | 23
| Commodity and other derivatives |  |  | 3 |  |  | 60 |  |  | 63 |  |  | - |  |  | 1 |  |  | 1
|  | Total long-term liabilities |  |  | 442 |  |  | 95 |  |  | 537 |  |  | 186 |  |  | 39 |  |  | 225
Total liabilities |  | $ | 558 |  | $ | 132 |  | $ | 690 |  | $ | 303 |  | $ | 55 |  | $ | 358
Accumulated Other Comprehensive Income Loss Derivatives Table |
|  |  | Accumulated Other
|  |  | Comprehensive
|  |  | Income (Loss) (1)
|  |  | (in millions)
| Interest rate derivatives |  | $ | (101)
| Cross currency derivatives |  | $ | (1)
| Foreign currency derivatives |  | $ | 7
| Commodity and other derivatives |  | $ | (1)
Gain Loss In Accumulated Other Comprehensive IncomeOn Effective Portion Of Qualifying Cash Flow Hedges Rollforward Table |
|  |  | Gains (Losses) |  |  |  |  | Gains (Losses) Reclassified
|  |  | Recognized in AOCL |  | Consolidated |  | from AOCL into Earnings
|  |  | 2011 |  | 2010 |  | 2009 |  | Statement of Operations |  | 2011 |  | 2010 |  | 2009
|  |  | (in millions) |  |  |  |  | (in millions)
Interest rate derivatives |  | $ | (475)(1) |  | $ | (243)(1) |  | $ | 49 |  | Interest expense |  | $ | (125)(2) |  | $ | (108)(2) |  | $ | (72)(2)
|  |  |  |  |  |  |  |  |  |  |  | Non-regulated cost of sales |  |  | (3) |  |  | (2) |  |  | -
|  |  |  |  |  |  |  |  |  |  |  | Net equity in earnings of |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  |  |  |  | affiliates |  |  | (4) |  |  | (1) |  |  | -
Cross currency derivatives |  |  | (36) |  |  | 11 |  |  | 48 |  | Interest expense |  |  | (10) |  |  | (1) |  |  | 2
|  |  |  |  |  |  |  |  |  |  |  | Foreign currency transaction |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  |  |  |  | gains (losses) |  |  | (16) |  |  | 25 |  |  | 43
Foreign currency derivatives |  |  | 24 |  |  | (9) |  |  | 2 |  | Foreign currency transaction |  |  |  |  |  |  |  |  |
|  |  |  |  |  |  |  |  |  |  |  |  | gains (losses) |  |  | 1 |  |  | (3) |  |  | -
Commodity and other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| derivatives |  |  | - |  |  | (8) |  |  | 120 |  | Non-regulated revenue |  |  | -(3) |  |  | -(3) |  |  | 3(3)
|  |  |  |  |  |  |  |  |  |  |  | Non-regulated cost of sales |  |  | (2) |  |  | - |  |  | -
Total |  | $ | (487) |  | $ | (249) |  | $ | 219 |  |  |  |  | $ | (159) |  | $ | (90) |  | $ | (24)
Gain Loss In Earnings On Ineffective Portion Of Qualifying Cash Flow Hedges Table |
|  |  |  |  | Gains (Losses)
|  | Classification in |  | Recognized in Earnings
|  | Consolidated Statement of Operations |  | 2011 |  | 2010 |  | 2009
|  |  |  |  | (in millions)
Interest rate derivatives |  | Interest expense |  | $ | (6) |  | $ | (15) |  | $ | (8)
|  | Net equity in earnings of affiliates |  |  | (2) |  |  | - (1) |  |  | (1)
Cross currency derivatives |  | Interest expense |  |  | (4) |  |  | 5 |  |  | (11)
Foreign currency derivatives |  | Foreign currency transaction |  |  |  |  |  |  |  |  |
|  |  | gains (losses) |  |  | - (1) |  |  | - (1) |  |  | -(1)
Total |  |  |  |  | $ | (12) |  | $ | (10) |  | $ | (20)
Gain Loss In Earnings On Non Hedging Instruments Table |
|  | Classification |  | Gains (Losses)
|  | in Consolidated |  | Recognized in Earnings
|  | Statement of Operations |  | 2011 |  | 2010 |  | 2009
|  |  |  |  | (in millions)
Interest rate derivatives |  | Interest expense |  | $ | (4) |  | $ | (9) |  | $ | (26)
Foreign currency derivatives |  | Foreign currency transaction |  |  |  |  |  |  |  |  |
|  |  | gains (losses) |  |  | 57 |  |  | (36) |  |  | (38)
|  | Net equity in earnings of |  |  |  |  |  |  |  |  |
|  |  | affiliates |  |  | - |  |  | (2) |  |  | -
Commodity and other derivatives |  | Non-regulated revenue |  |  | (71) |  |  | 21 |  |  | 1
|  | Regulated revenue |  |  | 1 |  |  | - |  |  | -
|  | Non-regulated cost of sales |  |  | (9) |  |  | 5 |  |  | (30)
|  | Regulated cost of sales |  |  | (5) |  |  | - |  |  | -
Total |  |  |  |  | $ | (31) |  | $ | (21) |  | $ | (93)
Regulatory Asset Liability Change In Fair Value Of Derivatives |
|  | 2011 |  | 2010
|  | (in millions)
(Increase) decrease in regulatory assets |  | $ | (5) |  | $ | (3)
Increase (decrease) in regulatory liabilities |  | $ | 8 |  | $ | 1

X
- Definition The element represents a table which sets forth, by type of derivative instrument, the pre-tax accumulated other comprehensive income (loss) expected to be recognized as an increase (decrease) to income from continuing operations before income taxes over the next twelve months as of the balance sheet date. + References No definition available. + Details
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- Definition This element represents a table which sets forth, by type of commodity, the outstanding notionals and weighted average remaining terms of the commodity derivatives (excluding Eastern Energy, which is presented separately) and embedded derivative instruments at the balance sheet date. + References No definition available. + Details
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- Definition This element represents a table which sets forth, by type of foreign currency denomination, the current outstanding notional, weighted average remaining term and percentage of variable-rate debt hedged at the balance sheet date, all of which are in qualifying cash flow hedging relationships. + References No definition available. + Details
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- Definition This element represents a table which sets forth the fair value and balance sheet classification of derivative instruments at the balance sheet date separately for derivative instruments designated as hedging instruments and derivative instruments not designated as hedging instruments. + References No definition available. + Details
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- Definition This element represents a table which sets forth, by type of foreign currency denomination, the outstanding notionals over the remaining terms of its foreign currency embedded derivative instruments at the balance sheet date. + References No definition available. + Details
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- Definition This element represents a table which sets for, by type of foreign currency denomination, the outstanding notionals over the remaining terms of the foreign currency option derivative instruments at the balance sheet date, regardless of whether the derivative instruments are in qualifying hedging relationships. + References No definition available. + Details
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- Definition This element represents a table which rolls forward the balance of gains (losses) recognized in accumulated other comprehensive income (loss) related to the effective portion of derivative instruments in qualifying cash flow hedging relationships for the periods indicated. + References No definition available. + Details
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- Definition This element represents tables which set forth, by type of derivative instrument, the gains (losses) recognized in earnings and the income statement classification related to the ineffective portion of derivative instruments in qualifying cash flow hedging relationships for the periods indicated. + References No definition available. + Details
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- Definition This element represents tables which set forth, by type of derivative instrument, the gains (losses) recognized in earnings and the income statement classification related to derivative instruments not designated as hedging instruments for the periods indicated. + References No definition available. + Details
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- Definition This element represents a table which sets forth, by type of interest rate derivative, the current and maximum outstanding notional, weighted average remaining term and percentage of variable-rate debt hedged at the balance sheet date, regardless of whether the derivative instruments are in qualifying cash flow hedging relationships. + References No definition available. + Details
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- Definition The element represents a table which sets forth the increase (decrease) in regulatory assets and liabilities resulting from the change in fair value of derivative instruments. + References No definition available. + Details
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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported 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 -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 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 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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