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Segment and Geographical Information (Tables) | 12 Months Ended
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Dec. 31, 2011
Segments Tables [Abstract] |
Revenue By Segment Table |
|  | Total Revenue |  | Intersegment |  | External Revenue
|  | 2011 |  | 2010 |  | 2009 |  | 2011 |  | 2010 |  | 2009 |  | 2011 |  | 2010 |  | 2009
|  | (in millions)
Revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Latin America - Generation |  | $ | 4,982 |  | $ | 4,281 |  | $ | 3,651 |  | $ | (1,148) |  | $ | (1,017) |  | $ | (864) |  | $ | 3,834 |  | $ | 3,264 |  | $ | 2,787
Latin America - Utilities |  |  | 7,374 |  |  | 6,987 |  |  | 5,877 |  |  | - |  |  | - |  |  | - |  |  | 7,374 |  |  | 6,987 |  |  | 5,877
North America - Generation |  |  | 1,465 |  |  | 1,453 |  |  | 1,381 |  |  | (4) |  |  | - |  |  | - |  |  | 1,461 |  |  | 1,453 |  |  | 1,381
North America - Utilities |  |  | 1,326 |  |  | 1,145 |  |  | 1,068 |  |  | - |  |  | - |  |  | - |  |  | 1,326 |  |  | 1,145 |  |  | 1,068
Europe - Generation |  |  | 1,550 |  |  | 1,318 |  |  | 762 |  |  | (2) |  |  | (2) |  |  | 2 |  |  | 1,548 |  |  | 1,316 |  |  | 764
Asia - Generation |  |  | 625 |  |  | 618 |  |  | 375 |  |  | - |  |  | - |  |  | - |  |  | 625 |  |  | 618 |  |  | 375
Corp/Other and eliminations |  |  | (48) |  |  | 26 |  |  | (4) |  |  | 1,154 |  |  | 1,019 |  |  | 862 |  |  | 1,106 |  |  | 1,045 |  |  | 858
Total Revenue |  | $ | 17,274 |  | $ | 15,828 |  | $ | 13,110 |  | $ | - |  | $ | - |  | $ | - |  | $ | 17,274 |  | $ | 15,828 |  | $ | 13,110
Adjusted Gross Margin by Segment Table |
|  |  | Total Adjusted Gross Margin |  | Intersegment |  | External Adjusted Gross Margin
|  |  | 2011 |  | 2010 |  | 2009 |  | 2011 |  | 2010 |  | 2009 |  | 2011 |  | 2010 |  | 2009
|  |  | (in millions)
Adjusted Gross Margin |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Latin America - Generation |  | $ | 2,086 |  | $ | 1,698 |  | $ | 1,528 |  | $ | (1,090) |  | $ | (1,010) |  | $ | (852) |  | $ | 996 |  | $ | 688 |  | $ | 676
Latin America - Utilities |  |  | 1,321 |  |  | 1,248 |  |  | 1,060 |  |  | 1,118 |  |  | 1,018 |  |  | 865 |  |  | 2,439 |  |  | 2,266 |  |  | 1,925
North America - Generation |  |  | 533 |  |  | 540 |  |  | 537 |  |  | 9 |  |  | 2 |  |  | (3) |  |  | 542 |  |  | 542 |  |  | 534
North America - Utilities |  |  | 394 |  |  | 407 |  |  | 401 |  |  | 1 |  |  | 2 |  |  | 2 |  |  | 395 |  |  | 409 |  |  | 403
Europe - Generation |  |  | 469 |  |  | 395 |  |  | 273 |  |  | 8 |  |  | 3 |  |  | 4 |  |  | 477 |  |  | 398 |  |  | 277
Asia - Generation |  |  | 176 |  |  | 255 |  |  | 111 |  |  | 2 |  |  | 2 |  |  | 4 |  |  | 178 |  |  | 257 |  |  | 115
Corp/Other and eliminations |  |  | (27) |  |  | 65 |  |  | 16 |  |  | (48) |  |  | (17) |  |  | (20) |  |  | (75) |  |  | 48 |  |  | (4)
Reconciliation to Income from Continuing Operations before Taxes |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  | (1,209) |  |  | (1,064) |  |  | (908)
Interest expense |  |  | (1,603) |  |  | (1,503) |  |  | (1,461)
Interest income |  |  | 400 |  |  | 408 |  |  | 344
Other expense |  |  | (156) |  |  | (234) |  |  | (104)
Other income |  |  | 149 |  |  | 100 |  |  | 459
Gain on sale of investments |  |  | 8 |  |  | - |  |  | 131
Goodwill impairment |  |  | (17) |  |  | (21) |  |  | (122)
Asset impairment expense |  |  | (225) |  |  | (389) |  |  | (20)
Foreign currency transaction gains (losses) |  |  | (38) |  |  | (33) |  |  | 35
Other non-operating expense |  |  | (82) |  |  | (7) |  |  | (12)
Income from continuing operations before taxes and equity in earnings of affiliates |  | $ | 2,179 |  | $ | 1,865 |  | $ | 2,268
Assets / Depreciation And Amortization / Capital Expenditures By Segment |
|  | Total Assets |  | Depreciation and Amortization |  | Capital Expenditures
|  | 2011 |  | 2010 |  | 2009 |  | 2011 |  | 2010 |  | 2009 |  | 2011 |  | 2010 |  | 2009
|  | (in millions)
Latin America - Generation |  | $ | 10,713 |  | $ | 10,373 |  | $ | 9,802 |  | $ | 261 |  | $ | 215 |  | $ | 183 |  | $ | 658 |  | $ | 641 |  | $ | 951
Latin America - Utilities |  |  | 9,468 |  |  | 9,609 |  |  | 8,810 |  |  | 293 |  |  | 231 |  |  | 201 |  |  | 666 |  |  | 584 |  |  | 356
North America - Generation |  |  | 4,326 |  |  | 4,519 |  |  | 4,914 |  |  | 150 |  |  | 160 |  |  | 158 |  |  | 64 |  |  | 71 |  |  | 64
North America - Utilities |  |  | 9,384 |  |  | 3,139 |  |  | 3,035 |  |  | 178 |  |  | 161 |  |  | 157 |  |  | 232 |  |  | 177 |  |  | 116
Europe - Generation |  |  | 3,276 |  |  | 3,317 |  |  | 3,147 |  |  | 136 |  |  | 114 |  |  | 53 |  |  | 140 |  |  | 233 |  |  | 212
Asia - Generation |  |  | 1,717 |  |  | 1,762 |  |  | 1,594 |  |  | 33 |  |  | 33 |  |  | 32 |  |  | 129 |  |  | 10 |  |  | 22
Discontinued businesses |  |  | 829 |  |  | 1,844 |  |  | 3,023 |  |  | 27 |  |  | 81 |  |  | 117 |  |  | 66 |  |  | 88 |  |  | 100
Corp/Other and eliminations |  |  | 5,620 |  |  | 5,948 |  |  | 5,210 |  |  | 184 |  |  | 183 |  |  | 148 |  |  | 506 |  |  | 529 |  |  | 717
Total |  | $ | 45,333 |  | $ | 40,511 |  | $ | 39,535 |  | $ | 1,262 |  | $ | 1,178 |  | $ | 1,049 |  | $ | 2,461 |  | $ | 2,333 |  | $ | 2,538
Investments In And Advances To Affiliates / Equity In Earnings By Segment |
|  | Investment in and |  |  |  |  |  |  |  |  |  |
|  | Advances to Affiliates |  | Equity in Earnings (Loss) |
|  | 2011 |  | 2010 |  | 2009 |  | 2011 |  | 2010 |  | 2009 |
|  | (in millions) |
Latin America - Generation |  | $ | 188 |  | $ | 150 |  | $ | 129 |  | $ | 35 |  | $ | 48 |  | $ | 30 |
Latin America - Utilities |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |
North America - Generation |  |  | 18 |  |  | - |  |  | 3 |  |  | (2) |  |  | (2) |  |  | (2) |
North America - Utilities |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |
Europe - Generation |  |  | 479 |  |  | 353 |  |  | 308 |  |  | 8 |  |  | 19 |  |  | 50 |
Asia - Generation |  |  | 291 |  |  | 409 |  |  | 390 |  |  | (1) |  |  | 3 |  |  | 28 |
Discontinued businesses |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |  |  | - |
Corp/Other and eliminations |  |  | 446 |  |  | 408 |  |  | 327 |  |  | (42) |  |  | 116 |  |  | (13) |
Total |  | $ | 1,422 |  | $ | 1,320 |  | $ | 1,157 |  | $ | (2) |  | $ | 184 |  | $ | 93 |
Revenue And PP&E By Country |
|  | Revenue |  | Property, Plant & Equipment, net
|  | 2011 |  | 2010 |  | 2009 |  | 2011 |  | 2010
|  | (in millions)
United States(1) |  | $ | 2,256 |  | $ | 2,095 |  | $ | 1,987 |  | $ | 8,448 |  | $ | 6,027
Non-U.S.: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Brazil(2) |  |  | 6,640 |  |  | 6,355 |  |  | 5,292 |  |  | 5,896 |  |  | 6,263
Chile |  |  | 1,608 |  |  | 1,355 |  |  | 1,239 |  |  | 2,781 |  |  | 2,560
Argentina(3) |  |  | 979 |  |  | 771 |  |  | 571 |  |  | 279 |  |  | 270
El Salvador |  |  | 752 |  |  | 648 |  |  | 619 |  |  | 268 |  |  | 261
Dominican Republic |  |  | 674 |  |  | 535 |  |  | 429 |  |  | 662 |  |  | 625
United Kingdom(4) |  |  | 587 |  |  | 364 |  |  | 228 |  |  | 523 |  |  | 507
Philippines |  |  | 480 |  |  | 501 |  |  | 250 |  |  | 766 |  |  | 784
Ukraine |  |  | 418 |  |  | 356 |  |  | 286 |  |  | 94 |  |  | 86
Mexico |  |  | 404 |  |  | 409 |  |  | 329 |  |  | 774 |  |  | 786
Cameroon |  |  | 386 |  |  | 422 |  |  | 370 |  |  | 901 |  |  | 823
Colombia |  |  | 365 |  |  | 393 |  |  | 347 |  |  | 384 |  |  | 387
Puerto Rico |  |  | 298 |  |  | 253 |  |  | 267 |  |  | 581 |  |  | 596
Spain(5) |  |  | 258 |  |  | 411 |  |  | - |  |  | - |  |  | -
Bulgaria(6) |  |  | 251 |  |  | 44 |  |  | - |  |  | 1,619 |  |  | 1,825
Hungary(7) |  |  | 204 |  |  | 252 |  |  | 259 |  |  | 6 |  |  | 73
Panama |  |  | 189 |  |  | 194 |  |  | 168 |  |  | 1,040 |  |  | 921
Kazakhstan |  |  | 145 |  |  | 138 |  |  | 123 |  |  | 86 |  |  | 63
Sri Lanka |  |  | 140 |  |  | 100 |  |  | 109 |  |  | 22 |  |  | 69
Jordan |  |  | 124 |  |  | 120 |  |  | 104 |  |  | 216 |  |  | 224
Qatar(8) |  |  | - |  |  | - |  |  | - |  |  | - |  |  | -
Pakistan(9) |  |  | - |  |  | - |  |  | - |  |  | - |  |  | -
Oman(10) |  |  | - |  |  | - |  |  | - |  |  | - |  |  | -
Other Non-U.S. (11) |  |  | 116 |  |  | 112 |  |  | 133 |  |  | 385 |  |  | 279
Total Non-U.S. |  |  | 15,018 |  |  | 13,733 |  |  | 11,123 |  |  | 17,283 |  |  | 17,402
Total |  | $ | 17,274 |  | $ | 15,828 |  | $ | 13,110 |  | $ | 25,731 |  | $ | 23,429

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