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Segment Reporting
 3 Months Ended
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)TexasEastWest/Services/OtherVivint Smart HomeCorporateEliminationsTotal
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 taxes349 580 (75)9 (168)— 695 
Net income/(loss) $349 $581 $(60)$7 $(366)$— $511 
Three months ended March 31, 2023
(In millions)TexasEastWest/Services/Other
Vivint Smart Home(a)
CorporateEliminationsTotal
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 taxes284 (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