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Segment Reporting (Tables) | 9 Months Ended
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Sep. 30, 2020
Segment Reporting [Abstract] |
Schedule of segment reporting information, by segment |
|  | Three months ended September 30, 2020
(In millions) |  | Texas |  | East |  | West/Other |  | Corporate |  | Eliminations |  | Total
Operating revenues |  | $ | 1,992 |  |  | $ | 693 |  |  | $ | 122 |  |  | $ | — |  |  | $ | 2 |  |  | $ | 2,809 |
Depreciation and amortization |  | 49 |  |  | 34 |  |  | 9 |  |  | 7 |  |  | — |  |  | 99 |
Impairment losses |  | — |  |  | — |  |  | 29 |  |  | — |  |  | — |  |  | 29 |
Equity in earnings of unconsolidated affiliates |  | — |  |  | — |  |  | 36 |  |  | — |  |  | — |  |  | 36 |
Income/(loss) from continuing operations before income taxes |  | 288 |  |  | 149 |  |  | 17 |  |  | (113) |  |  | — |  |  | 341 |
Income/(loss) from continuing operations |  | 288 |  |  | 149 |  |  | 17 |  |  | (205) |  |  | — |  |  | 249 |
Net income/(loss) attributable to NRG Energy, Inc |  | $ | 288 |  |  | $ | 149 |  |  | $ | 17 |  |  | $ | (205) |  |  | $ | — |  |  | $ | 249 |
|  | Three months ended September 30, 2019
(In millions) |  | Texas |  | East |  | West/Other |  | Corporate |  | Eliminations |  | Total
Operating revenues |  | $ | 2,208 |  |  | $ | 679 |  |  | $ | 111 |  |  | $ | — |  |  | $ | (2) |  |  | $ | 2,996 |
Depreciation and amortization |  | 45 |  |  | 31 |  |  | 8 |  |  | 7 |  |  | — |  |  | 91 |
Equity in earnings of unconsolidated affiliates |  | 1 |  |  | — |  |  | 28 |  |  | — |  |  | — |  |  | 29 |
Income/(loss) from continuing operations before income taxes |  | 348 |  |  | 121 |  |  | 16 |  |  | (106) |  |  | 1 |  |  | 380 |
Income/(loss) from continuing operations |  | 348 |  |  | 121 |  |  | 15 |  |  | (111) |  |  | 1 |  |  | 374 |
Loss from discontinued operations, net of tax |  | — |  |  | — |  |  | — |  |  | (2) |  |  | — |  |  | (2) |
Net income/(loss) |  | 348 |  |  | 121 |  |  | 15 |  |  | (113) |  |  | 1 |  |  | 372 |
Net income/(loss) attributable to NRG Energy, Inc. |  | $ | 348 |  |  | $ | 121 |  |  | $ | 15 |  |  | $ | (113) |  |  | $ | 1 |  |  | $ | 372 |
|  | Nine months ended September 30, 2020
(In millions) |  | Texas |  | East |  | West/Other |  | Corporate |  | Eliminations |  | Total
Operating revenues |  | $ | 4,928 |  |  | $ | 1,798 |  |  | $ | 341 |  |  | $ | — |  |  | $ | (1) |  |  | $ | 7,066 |
Depreciation and amortization |  | 167 |  |  | 100 |  |  | 25 |  |  | 26 |  |  | — |  |  | 318 |
Impairment losses |  | — |  |  | — |  |  | 29 |  |  | — |  |  | — |  |  | 29 |
Gain on sale of assets |  | — |  |  | — |  |  | 1 |  |  | 5 |  |  | — |  |  | 6 |
Equity in (losses)/earnings of unconsolidated affiliates |  | (3) |  |  | — |  |  | 40 |  |  | — |  |  | — |  |  | 37 |
Income/(loss) from continuing operations before income taxes |  | 800 |  |  | 319 |  |  | 84 |  |  | (304) |  |  | — |  |  | 899 |
Income/(loss) from continuing operations |  | 800 |  |  | 319 |  |  | 83 |  |  | (519) |  |  | — |  |  | 683 |
Net income/(loss) attributable to NRG Energy, Inc |  | $ | 800 |  |  | $ | 319 |  |  | $ | 83 |  |  | $ | (519) |  |  | $ | — |  |  | $ | 683 |
|  | Nine months ended September 30, 2019
(In millions) |  | Texas |  | East |  | West/Other |  | Corporate |  | Eliminations |  | Total
Operating revenues |  | $ | 5,511 |  |  | $ | 1,812 |  |  | $ | 310 |  |  | $ | — |  |  | $ | (7) |  |  | $ | 7,626 |
Depreciation and amortization |  | 125 |  |  | 87 |  |  | 26 |  |  | 23 |  |  | — |  |  | 261 |
Reorganization costs |  | 5 |  |  | — |  |  | — |  |  | 11 |  |  | — |  |  | 16 |
Gain on sale of assets |  | — |  |  | 1 |  |  | — |  |  | 1 |  |  | — |  |  | 2 |
Equity in (losses)/earnings of unconsolidated affiliates |  | (5) |  |  | — |  |  | 13 |  |  | — |  |  | — |  |  | 8 |
Loss on debt extinguishment, net |  | — |  |  | — |  |  | — |  |  | (47) |  |  | — |  |  | (47) |
Income/(loss) from continuing operations before income taxes |  | 757 |  |  | 280 |  |  | 11 |  |  | (382) |  |  | — |  |  | 666 |
Income/(loss) from continuing operations |  | 757 |  |  | 280 |  |  | 10 |  |  | (390) |  |  | — |  |  | 657 |
Income from discontinued operations, net of tax |  | — |  |  | — |  |  | — |  |  | 399 |  |  | — |  |  | 399 |
Net income |  | 757 |  |  | 280 |  |  | 10 |  |  | 9 |  |  | — |  |  | 1,056 |
Net income attributable to NRG Energy, Inc. |  | $ | 757 |  |  | $ | 280 |  |  | $ | 9 |  |  | $ | 9 |  |  | $ | — |  |  | $ | 1,055 |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 + Details
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