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Segment Reporting (Tables) | 12 Months Ended
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Dec. 31, 2020
Segment Reporting [Abstract] |
Segment Reporting |
| For the Year Ended December 31, 2020
(In millions) | Texas |  | East |  | West/Other |  | Corporate(a) |  | Eliminations |  | Total
Operating revenues(a) | $ | 6,309 |  |  | $ | 2,354 |  |  | $ | 434 |  |  | $ | — |  |  | $ | (4) |  |  | $ | 9,093 |
Operating expenses | 5,246 |  |  | 1,828 |  |  | 346 |  |  | 57 |  |  | (4) |  |  | 7,473 |
Depreciation and amortization | 227 |  |  | 142 |  |  | 32 |  |  | 34 |  |  | — |  |  | 435 |
Impairment losses | 14 |  |  | — |  |  | 61 |  |  | — |  |  | — |  |  | 75 |
Development costs | 4 |  |  | 3 |  |  | 1 |  |  | — |  |  | — |  |  | 8 |
Total operating cost and expenses | 5,491 |  |  | 1,973 |  |  | 440 |  |  | 91 |  |  | (4) |  |  | 7,991 |
(Loss)/gain on sale of assets | — |  |  | — |  |  | (2) |  |  | 5 |  |  | — |  |  | 3 |
Operating income/(loss) | 818 |  |  | 381 |  |  | (8) |  |  | (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 | 799 |  |  | 370 |  |  | 21 |  |  | (429) |  |  | — |  |  | 761 |
Income tax (benefit)/expense | — |  |  | (1) |  |  | 2 |  |  | 250 |  |  | — |  |  | 251 |
Net income/(loss) attributable to NRG Energy, Inc. | $ | 799 |  |  | $ | 371 |  |  | $ | 19 |  |  | $ | (679) |  |  | $ | — |  |  | $ | 510 |
Balance sheet |  |  |  |  |  |  |  |  |  |  |
Equity investments in affiliates | $ | (13) |  |  | $ | — |  |  | $ | 359 |  |  | $ | — |  |  | $ | — |  |  | $ | 346 |
Capital expenditures | 130 |  |  | 45 |  |  | 30 |  |  | 25 |  |  | — |  |  | 230 |
Goodwill(b) | 325 |  |  | 254 |  |  | — |  |  | — |  |  | — |  |  | 579 |
Total assets | $ | 7,641 |  |  | $ | 1,885 |  |  | $ | 1,584 |  |  | $ | 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/Other |  | Corporate(a) |  | Eliminations |  | Total
Operating revenues(a) | $ | 7,069 |  |  | $ | 2,319 |  |  | $ | 440 |  |  | $ | — |  |  | $ | (7) |  |  | $ | 9,821 |
Operating expenses | 5,818 |  |  | 1,895 |  |  | 397 |  |  | 50 |  |  | (7) |  |  | 8,153 |
Depreciation and amortization | 188 |  |  | 121 |  |  | 33 |  |  | 31 |  |  | — |  |  | 373 |
Impairment losses | 1 |  |  | — |  |  | 4 |  |  | — |  |  | — |  |  | 5 |
Development costs | 3 |  |  | 3 |  |  | 1 |  |  | — |  |  | — |  |  | 7 |
Total operating cost and expenses | 6,010 |  |  | 2,019 |  |  | 435 |  |  | 81 |  |  | (7) |  |  | 8,538 |
Gain on sale of assets | — |  |  | 1 |  |  | — |  |  | 6 |  |  | — |  |  | 7 |
Operating income/(loss) | 1,059 |  |  | 301 |  |  | 5 |  |  | (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 |  |  | 289 |  |  | 8 |  |  | (483) |  |  | — |  |  | 786 |
Income tax expense/(benefit) | — |  |  | 2 |  |  | 1 |  |  | (3,337) |  |  | — |  |  | (3,334) |
Net income from continuing operations | 972 |  |  | 287 |  |  | 7 |  |  | 2,854 |  |  | — |  |  | 4,120 |
Gain from discontinued operations, net of income tax | — |  |  | — |  |  | — |  |  | 321 |  |  | — |  |  | 321 |
Net Income | 972 |  |  | 287 |  |  | 7 |  |  | 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 |  |  | $ | 287 |  |  | $ | 4 |  |  | $ | 3,175 |  |  | $ | — |  |  | $ | 4,438 |
Balance sheet |  |  |  |  |  |  |  |  |  |  |
Equity investments in affiliates | $ | 6 |  |  | $ | — |  |  | $ | 382 |  |  | $ | — |  |  | $ | — |  |  | $ | 388 |
Capital expenditures | 136 |  |  | 30 |  |  | 25 |  |  | 37 |  |  | — |  |  | 228 |
Goodwill(b) | 325 |  |  | 254 |  |  | — |  |  | — |  |  | — |  |  | 579 |
Total assets | $ | 5,711 |  |  | $ | 2,160 |  |  | $ | 1,190 |  |  | $ | 8,342 |  |  | $ | (4,872) |  |  | $ | 12,531 |
(a) Inter-segment sales and inter-segment net derivative gains and losses included in operating revenues | $ | 1 |  |  | $ | 8 |  |  | $ | (2) |  |  | $ | — |  |  | $ | — |  |  | $ | 7 |
(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, 2018
(In millions) | Texas |  | East |  | West/Other |  | Corporate(a) |  | Eliminations |  | Total
Operating revenues(a) | $ | 6,401 |  |  | $ | 2,371 |  |  | $ | 724 |  |  | $ | — |  |  | $ | (18) |  |  | $ | 9,478 |
Operating expenses | 5,399 |  |  | 2,024 |  |  | 467 |  |  | 125 |  |  | (18) |  |  | 7,997 |
Depreciation and amortization | 156 |  |  | 105 |  |  | 127 |  |  | 33 |  |  | — |  |  | 421 |
Impairment losses | 5 |  |  | 82 |  |  | 12 |  |  | — |  |  | — |  |  | 99 |
Development costs | 3 |  |  | 3 |  |  | 3 |  |  | 2 |  |  | — |  |  | 11 |
Total operating cost and expenses | 5,563 |  |  | 2,214 |  |  | 609 |  |  | 160 |  |  | (18) |  |  | 8,528 |
Gain/(loss) on sale of assets | 4 |  |  | — |  |  | (2) |  |  | 30 |  |  | — |  |  | 32 |
Operating income/(loss) | 842 |  |  | 157 |  |  | 113 |  |  | (130) |  |  | — |  |  | 982 |
Equity in (losses)/earnings of unconsolidated affiliates | (3) |  |  | — |  |  | 13 |  |  | (1) |  |  | — |  |  | 9 |
Impairment losses on investments | (15) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (15) |
Other income/(loss), net | 13 |  |  | 2 |  |  | 4 |  |  | (1) |  |  | — |  |  | 18 |
Loss on debt extinguishment | — |  |  | — |  |  | — |  |  | (44) |  |  | — |  |  | (44) |
Interest expense | — |  |  | (22) |  |  | (39) |  |  | (422) |  |  | — |  |  | (483) |
Income/(loss) from continuing operations before income taxes | 837 |  |  | 137 |  |  | 91 |  |  | (598) |  |  | — |  |  | 467 |
Income tax expense | — |  |  | 1 |  |  | — |  |  | 6 |  |  | — |  |  | 7 |
Net income/(loss) from continuing operations | 837 |  |  | 136 |  |  | 91 |  |  | (604) |  |  | — |  |  | 460 |
Loss from discontinued operations, net of income tax | — |  |  | — |  |  | — |  |  | (192) |  |  | — |  |  | (192) |
Net Income/(loss) | 837 |  |  | 136 |  |  | 91 |  |  | (796) |  |  | — |  |  | 268 |
Less: Net income/(loss) attributable to noncontrolling interests and redeemable noncontrolling interests | — |  |  | — |  |  | 5 |  |  | (5) |  |  | — |  |  | — |
Net income/(loss) attributable to NRG Energy, Inc. | $ | 837 |  |  | $ | 136 |  |  | $ | 86 |  |  | $ | (791) |  |  | $ | — |  |  | $ | 268 |
(a) Inter-segment sales and inter-segment net derivative gains and losses included in operating revenues | $ | 19 |  |  | $ | (5) |  |  | $ | 4 |  |  | $ | — |  |  | $ | — |  |  | $ | 18 |
(b) Goodwill was allocated based on the regions in which the business operates and are expected to benefit using a relative fair value approach

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