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Segment Reporting | 3 Months Ended
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Mar. 31, 2024
Segment Reporting [Abstract] |
Segment Reporting | Segment Reporting The Company’s segment structure reflects how management currently makes financial decisions and allocates resources. The Company manages its operations based on the combined results of the retail and wholesale generation businesses with a geographical focus. Vivint Smart Home operations are reported within the Vivint Smart Home segment. NRG’s chief operating decision maker, its interim chief executive officer, evaluates the performance of the Company's segments based on operational measures including adjusted earnings before interest, taxes, depreciation and amortization, or Adjusted EBITDA, free cash flow and allocation of capital, as well as net income/(loss). The accounting policies of the segments are the same as those applied in the consolidated financial statements as disclosed in Note 2, Summary of Significant Accounting Policies, to the Company’s 2023 Form 10-K.
|  | Three months ended March 31, 2024
(In millions) |  | Texas |  | East |  | West/Services/Other |  | Vivint Smart Home |  | Corporate |  | Eliminations |  | Total
Revenue |  | $ | 2,233 |  |  | $ | 3,515 |  |  | $ | 1,219 |  |  | $ | 468 |  |  | $ | — |  |  | $ | (6) |  |  | $ | 7,429 |
Depreciation and amortization |  | 67 |  |  | 23 |  |  | 24 |  |  | 144 |  |  | 10 |  |  | — |  |  | 268 |
Loss on sale of assets |  | (4) |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (4) |
Equity in earnings of unconsolidated affiliates |  | — |  |  | — |  |  | 3 |  |  | — |  |  | — |  |  | — |  |  | 3 |
Loss on debt extinguishment |  | — |  |  | — |  |  | — |  |  | — |  |  | (58) |  |  | — |  |  | (58) |
Income/(loss) before income taxes |  | 349 |  |  | 580 |  |  | (75) |  |  | 9 |  |  | (168) |  |  | — |  |  | 695 |
Net income/(loss) |  | $ | 349 |  |  | $ | 581 |  |  | $ | (60) |  |  | $ | 7 |  |  | $ | (366) |  |  | $ | — |  |  | $ | 511 |
|  | Three months ended March 31, 2023
(In millions) |  | Texas |  | East |  | West/Services/Other |  | Vivint Smart Home(a) |  | Corporate |  | Eliminations |  | Total
Revenue |  | $ | 2,034 |  |  | $ | 4,176 |  |  | $ | 1,374 |  |  | $ | 148 |  |  | $ | — |  |  | $ | (10) |  |  | $ | 7,722 |
Depreciation and amortization |  | 75 |  |  | 30 |  |  | 24 |  |  | 52 |  |  | 9 |  |  | — |  |  | 190 |
Gain on sale of assets |  | — |  |  | 199 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 199 |
Equity in earnings of unconsolidated affiliates |  | — |  |  | — |  |  | 5 |  |  | — |  |  | — |  |  | — |  |  | 5 |
Income/(loss) before income taxes |  | 284 |  |  | (1,402) |  |  | (351) |  |  | (39) |  |  | (163) |  |  | — |  |  | (1,671) |
Net income/(loss) |  | $ | 284 |  |  | $ | (1,402) |  |  | $ | (304) |  |  | $ | (39) |  |  | $ | 126 |  |  | $ | — |  |  | $ | (1,335) |
(a)Includes results of operations following the acquisition date of March 10, 2023

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-22 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-15 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 31 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-31 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-42 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-40 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//280/tableOfContent Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 26 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-26 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 34 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-34 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-41 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-21 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 21 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-21 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-32 + Details
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