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Segments (Tables) | 3 Months Ended
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Mar. 31, 2012
Segments Tables [Abstract] |
Revenue By Segment Table |
Three months ended |  | Total Revenue |  | Intersegment |  | External Revenue
March 31, |  | 2012 |  | 2011 |  | 2012 |  | 2011 |  | 2012 |  | 2011
|  | (in millions)
Generation - Latin America - Other |  | $ | 959 |  | $ | 878 |  | $ | (10) |  | $ | (9) |  | $ | 949 |  | $ | 869
Generation - Tietê |  |  | 305 |  |  | 253 |  |  | (282) |  |  | (242) |  |  | 23 |  |  | 11
Generation - North America |  |  | 317 |  |  | 334 |  |  | - |  |  | - |  |  | 317 |  |  | 334
Generation - Europe |  |  | 450 |  |  | 400 |  |  | - |  |  | (1) |  |  | 450 |  |  | 399
Generation - Asia |  |  | 181 |  |  | 115 |  |  | - |  |  | - |  |  | 181 |  |  | 115
Utilities - Latin America |  |  | 1,734 |  |  | 1,840 |  |  | - |  |  | - |  |  | 1,734 |  |  | 1,840
Utilities - North America |  |  | 732 |  |  | 289 |  |  | - |  |  | - |  |  | 732 |  |  | 289
Corp and Other |  |  | 347 |  |  | 293 |  |  | 7 |  |  | 6 |  |  | 354 |  |  | 299
Total Revenue |  | $ | 5,025 |  | $ | 4,402 |  | $ | (285) |  | $ | (246) |  | $ | 4,740 |  | $ | 4,156
Adjusted Gross Margin by Segment Table |
Three months ended |  | Total Adjusted Gross Margin |  | Intersegment |  | External Adjusted Gross Margin
March 31, |  | 2012 |  | 2011 |  | 2012 |  | 2011 |  | 2012 |  | 2011
|  | (in millions)
Generation - Latin America - Other |  | $ | 287 |  | $ | 268 |  | $ | 4 |  | $ | 3 |  | $ | 291 |  | $ | 271
Generation - Tietê |  |  | 239 |  |  | 202 |  |  | (282) |  |  | (242) |  |  | (43) |  |  | (40)
Generation - North America |  |  | 106 |  |  | 106 |  |  | 2 |  |  | 4 |  |  | 108 |  |  | 110
Generation - Europe |  |  | 237 |  |  | 106 |  |  | (7) |  |  | 1 |  |  | 230 |  |  | 107
Generation - Asia |  |  | 58 |  |  | 45 |  |  | - |  |  | 1 |  |  | 58 |  |  | 46
Utilities - Latin America |  |  | 167 |  |  | 320 |  |  | 285 |  |  | 245 |  |  | 452 |  |  | 565
Utilities - North America |  |  | 213 |  |  | 90 |  |  | - |  |  | - |  |  | 213 |  |  | 90
Corp and Other & eliminations |  |  | 35 |  |  | 42 |  |  | (2) |  |  | (12) |  |  | 33 |  |  | 30
Reconciliation to Income from Continuing Operations before Taxes |  |  |  |  |  |
Depreciation and amortization |  |  | (351) |  |  | (281)
Interest expense |  |  | (416) |  |  | (338)
Interest income |  |  | 91 |  |  | 95
Other expense |  |  | (29) |  |  | (15)
Other income |  |  | 18 |  |  | 16
Gain on sale of investments |  |  | 179 |  |  | 6
Asset impairment expense |  |  | (11) |  |  | -
Foreign currency transaction gains (losses) |  |  | (1) |  |  | 33
Other non-operating expense |  |  | (49) |  |  | -
Income from continuing operations before taxes and equity in earnings of affiliates |  | $ | 773 |  | $ | 695
Assets By Segment Table |
|  |  | Total Assets
|  |  | March 31, 2012 |  | December 31, 2011
|  |  | (in millions)
| Assets |  |  |  |  |  |
| Generation - Latin America - Other |  | $ | 9,271 |  | $ | 9,067
| Generation - Tietê |  |  | 1,670 |  |  | 1,645
| Generation - North America |  |  | 3,627 |  |  | 3,625
| Generation - Europe |  |  | 3,456 |  |  | 3,276
| Generation - Asia |  |  | 1,769 |  |  | 1,717
| Utilities - Latin America |  |  | 9,987 |  |  | 9,468
| Utilities - North America |  |  | 9,338 |  |  | 9,384
| Discontinued businesses |  |  | 719 |  |  | 1,531
| Corp and Other & eliminations |  |  | 5,594 |  |  | 5,620
| Total Assets |  | $ | 45,431 |  | $ | 45,333

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