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Segment Reporting (Tables) | 12 Months Ended
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Dec. 31, 2021
Segment Reporting [Abstract] |
Segment Reporting |
| For the Year Ended December 31, 2021
(In millions) | Texas |  | East |  | West/Services/Other |  | Corporate(a) |  | Eliminations |  | Total
Operating revenues(a) | $ | 10,293 |  |  | $ | 13,033 |  |  | $ | 3,653 |  |  | $ | — |  |  | $ | 10 |  |  | $ | 26,989 |
Operating expenses | 8,692 |  |  | 10,257 |  |  | 3,466 |  |  | 141 |  |  | 10 |  |  | 22,566 |
Depreciation and amortization | 331 |  |  | 338 |  |  | 88 |  |  | 28 |  |  | — |  |  | 785 |
Impairment losses | — |  |  | 535 |  |  | 9 |  |  | — |  |  | — |  |  | 544 |
Total operating cost and expenses | 9,023 |  |  | 11,130 |  |  | 3,563 |  |  | 169 |  |  | 10 |  |  | 23,895 |
Gain on sale of assets | 19 |  |  | — |  |  | 17 |  |  | 211 |  |  | — |  |  | 247 |
Operating income | 1,289 |  |  | 1,903 |  |  | 107 |  |  | 42 |  |  | — |  |  | 3,341 |
Equity in (losses)/earnings of unconsolidated affiliates | (3) |  |  | — |  |  | 20 |  |  | — |  |  | — |  |  | 17 |
Other income, net | 8 |  |  | 7 |  |  | 3 |  |  | 59 |  |  | (14) |  |  | 63 |
Loss on debt extinguishment | — |  |  | — |  |  | — |  |  | (77) |  |  | — |  |  | (77) |
Interest expense | (1) |  |  | (1) |  |  | (28) |  |  | (469) |  |  | 14 |  |  | (485) |
Income/(loss) from continuing operations before income taxes | 1,293 |  |  | 1,909 |  |  | 102 |  |  | (445) |  |  | — |  |  | 2,859 |
Income tax expense | — |  |  | — |  |  | 19 |  |  | 653 |  |  | — |  |  | 672 |
Net income/(loss) attributable to NRG Energy, Inc. | $ | 1,293 |  |  | $ | 1,909 |  |  | $ | 83 |  |  | $ | (1,098) |  |  | $ | — |  |  | $ | 2,187 |
Balance sheet |  |  |  |  |  |  |  |  |  |  |
Equity investments in affiliates | $ | — |  |  | $ | — |  |  | $ | 157 |  |  | $ | — |  |  | $ | — |  |  | $ | 157 |
Capital expenditures | 153 |  |  | 50 |  |  | 21 |  |  | 45 |  |  | — |  |  | 269 |
Goodwill | 751 |  |  | 853 |  |  | 191 |  |  | — |  |  | — |  |  | 1,795 |
Total assets | $ | 12,265 |  |  | $ | 13,673 |  |  | $ | 4,816 |  |  | $ | 19,081 |  |  | $ | (26,653) |  |  | $ | 23,182 |
(a) Inter-segment sales and inter-segment net derivative gains and losses included in operating revenues | $ | 5 |  |  | $ | (18) |  |  | $ | 3 |  |  | $ | — |  |  | $ | — |  |  | $ | (10) |
| For the Year Ended December 31, 2020
(In millions) | Texas |  | East |  | West/Services/Other |  | Corporate(a) |  | Eliminations |  | Total
Operating revenues(a) | $ | 6,309 |  |  | $ | 2,258 |  |  | $ | 530 |  |  | $ | — |  |  | $ | (4) |  |  | $ | 9,093 |
Operating expenses | 5,249 |  |  | 1,758 |  |  | 421 |  |  | 57 |  |  | (4) |  |  | 7,481 |
Depreciation and amortization | 227 |  |  | 138 |  |  | 36 |  |  | 34 |  |  | — |  |  | 435 |
Impairment losses | 14 |  |  | — |  |  | 61 |  |  | — |  |  | — |  |  | 75 |
Total operating cost and expenses | 5,490 |  |  | 1,896 |  |  | 518 |  |  | 91 |  |  | (4) |  |  | 7,991 |
(Loss)/gain on sale of assets | — |  |  | — |  |  | (2) |  |  | 5 |  |  | — |  |  | 3 |
Operating income/(loss) | 819 |  |  | 362 |  |  | 10 |  |  | (86) |  |  | — |  |  | 1,105 |
Equity in (losses)/earnings of unconsolidated affiliates | (12) |  |  | — |  |  | 29 |  |  | — |  |  | — |  |  | 17 |
Impairment losses on investments | (18) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (18) |
Other income, net | 11 |  |  | 7 |  |  | 8 |  |  | 41 |  |  | — |  |  | 67 |
Loss on debt extinguishment | — |  |  | (4) |  |  | (5) |  |  | — |  |  | — |  |  | (9) |
Interest expense | — |  |  | (14) |  |  | (3) |  |  | (384) |  |  | — |  |  | (401) |
Income/(loss) from continuing operations before income taxes | 800 |  |  | 351 |  |  | 39 |  |  | (429) |  |  | — |  |  | 761 |
Income tax (benefit)/expense | — |  |  | (1) |  |  | 2 |  |  | 250 |  |  | — |  |  | 251 |
Net income attributable to NRG Energy, Inc. | $ | 800 |  |  | $ | 352 |  |  | $ | 37 |  |  | $ | (679) |  |  | $ | — |  |  | $ | 510 |
Balance sheet |  |  |  |  |  |  |  |  |  |  |
Equity investments in affiliates | $ | (13) |  |  | $ | — |  |  | $ | 359 |  |  | $ | — |  |  | $ | — |  |  | $ | 346 |
Capital expenditures | 130 |  |  | 45 |  |  | 30 |  |  | 25 |  |  | — |  |  | 230 |
Goodwill(b) | 324 |  |  | 240 |  |  | 15 |  |  | — |  |  | — |  |  | 579 |
Total assets | $ | 7,641 |  |  | $ | 1,790 |  |  | $ | 1,679 |  |  | $ | 11,152 |  |  | $ | (7,360) |  |  | $ | 14,902 |
(a) Inter-segment sales and inter-segment net derivative gains and losses included in operating revenues | $ | 6 |  |  | $ | (6) |  |  | $ | 4 |  |  | $ | — |  |  | $ | — |  |  | $ | 4 |
(b) Goodwill was allocated based on the regions in which the business operates and are expected to benefit using a relative fair value approach
| For the Year Ended December 31, 2019
(In millions) | Texas |  | East |  | West/Services/Other |  | Corporate(a) |  | Eliminations |  | Total
Operating revenues(a) | $ | 7,069 |  |  | $ | 2,262 |  |  | $ | 497 |  |  | $ | — |  |  | $ | (7) |  |  | $ | 9,821 |
Operating expenses | 5,821 |  |  | 1,843 |  |  | 453 |  |  | 50 |  |  | (7) |  |  | 8,160 |
Depreciation and amortization | 188 |  |  | 117 |  |  | 37 |  |  | 31 |  |  | — |  |  | 373 |
Impairment losses | 1 |  |  | — |  |  | 4 |  |  | — |  |  | — |  |  | 5 |
Total operating cost and expenses | 6,010 |  |  | 1,960 |  |  | 494 |  |  | 81 |  |  | (7) |  |  | 8,538 |
Gain on sale of assets | — |  |  | 1 |  |  | — |  |  | 6 |  |  | — |  |  | 7 |
Operating income/(loss) | 1,059 |  |  | 303 |  |  | 3 |  |  | (75) |  |  | — |  |  | 1,290 |
Equity in (losses)/earnings of unconsolidated affiliates | (4) |  |  | — |  |  | 6 |  |  | — |  |  | — |  |  | 2 |
Impairment losses on investments | (103) |  |  | — |  |  | — |  |  | (5) |  |  | — |  |  | (108) |
Other income, net | 20 |  |  | 6 |  |  | 10 |  |  | 30 |  |  | — |  |  | 66 |
Loss on debt extinguishment | — |  |  | — |  |  | (3) |  |  | (48) |  |  | — |  |  | (51) |
Interest expense | — |  |  | (18) |  |  | (10) |  |  | (385) |  |  | — |  |  | (413) |
Income/(loss) from continuing operations before income taxes | 972 |  |  | 291 |  |  | 6 |  |  | (483) |  |  | — |  |  | 786 |
Income tax expense/(benefit) | — |  |  | 2 |  |  | 1 |  |  | (3,337) |  |  | — |  |  | (3,334) |
Net income from continuing operations | 972 |  |  | 289 |  |  | 5 |  |  | 2,854 |  |  | — |  |  | 4,120 |
Gain from discontinued operations, net of income tax | — |  |  | — |  |  | — |  |  | 321 |  |  | — |  |  | 321 |
Net Income | 972 |  |  | 289 |  |  | 5 |  |  | 3,175 |  |  | — |  |  | 4,441 |
Less: Net income attributable to noncontrolling interests and redeemable noncontrolling interests | — |  |  | — |  |  | 3 |  |  | — |  |  | — |  |  | 3 |
Net income attributable to NRG Energy, Inc. | $ | 972 |  |  | $ | 289 |  |  | $ | 2 |  |  | $ | 3,175 |  |  | $ | — |  |  | $ | 4,438 |
(a) Inter-segment sales and inter-segment net derivative gains and losses included in operating revenues | $ | 1 |  |  | $ | 8 |  |  | $ | (2) |  |  | $ | — |  |  | $ | — |  |  | $ | 7 |

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