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Segment Reporting
 6 Months Ended
Jun. 30, 2023
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. The acquired operations from the Vivint Smart Home acquisition are reported within the Vivint Smart Home segment.
NRG’s chief operating decision maker, its 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 2022 Form 10-K.

Three months ended June 30, 2023
(In millions)TexasEastWest/Services/OtherVivint Smart HomeCorporateEliminationsTotal
Revenue
$2,515 $2,503 $892 $444 $— $(6)$6,348 
Depreciation and amortization
73 30 23 180 9 — 315 
Gain on sale of assets
— 3 — — — — 3 
Equity in earnings of unconsolidated affiliates
— — 5 — — — 5 
Income/(loss) before income taxes785 (100)(128)(23)(137)— 397 
Net income/(loss) $785 $(101)$(129)$(23)$(224)$— $308 
Three months ended June 30, 2022
(In millions)TexasEastWest/Services/OtherCorporateEliminationsTotal
Revenue
$2,692 $3,514 $1,076 $— $— $7,282 
Depreciation and amortization
77 50 22 8 — 157 
Impairment losses
— 155 — — — 155 
(Loss)/gain on sale of assets(12)— 44 — — 32 
Equity in earnings of unconsolidated affiliates
— — 4 — — 4 
Income/(loss) before income taxes762 (13)35 (119)— 665 
Net income/(loss)$762 $(12)$24 $(261)$— $513 
Six months ended June 30, 2023
(In millions)TexasEastWest/Services/Other
Vivint Smart Home(a)
CorporateEliminationsTotal
Revenue$4,549 $6,679 $2,266 $592 $— $(16)$14,070 
Depreciation and amortization148 60 47 232 18 — 505 
Gain on sale of assets
— 202 — — — — 202 
Equity in earnings of unconsolidated affiliates— — 10 — — — 10 
Income/(loss) before income taxes1,069 (1,502)(479)(62)(300)— (1,274)
Net income/(loss) $1,069 $(1,503)$(433)$(62)$(98)$— $(1,027)
(a)Includes results of operations following the acquisition date of March 10, 2023
Six months ended June 30, 2022
(In millions)TexasEastWest/Services/OtherCorporateEliminationsTotal
Revenue$4,712 $8,229 $2,220 $— $17 $15,178 
Depreciation and amortization154 127 43 16 — 340 
Impairment losses— 155 — — — 155 
(Loss)/gain on sale of assets(12)— 43 (2)— 29 
Equity in losses of unconsolidated affiliates(1)— (10)— — (11)
Income/(loss) before income taxes1,533 1,525 164 (250)— 2,972 
Net income/(loss)$1,533 $1,526 $154 $(964)$— $2,249