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Segment Reporting
 9 Months Ended
Sep. 30, 2022
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.
NRG’s chief operating decision maker, its chief executive officer, evaluates the performance of its 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).
Three months ended September 30, 2022
(In millions)TexasEastWest/Services/OtherCorporateEliminationsTotal
Revenue
$3,149 $4,180 $1,169 $— $12 $8,510 
Depreciation and amortization
77 39 22 7 — 145 
Impairment losses
— 43 — — — 43 
Gain on sale of assets
22 — — — — 22 
Equity in (losses)/earnings of unconsolidated affiliates
(1)— 12 — — 11 
(Loss)/Income before income taxes(475)555 106 (103)— 83 
Net (loss)/income $(475)$555 $88 $(101)$— $67 
Three months ended September 30, 2021
(In millions)TexasEastWest/Services/OtherCorporateEliminationsTotal
Revenue
$2,635 $3,077 $883 $— $14 $6,609 
Depreciation and amortization
84 87 21 7 — 199 
Equity in (losses)/earnings of unconsolidated affiliates
(2)— 17 — — 15 
Income/(loss) before income taxes251 1,980 140 (208)— 2,163 
Net income/(loss)$251 $1,980 $126 $(739)$— $1,618 
Nine months ended September 30, 2022
(In millions)TexasEastWest/Services/OtherCorporateEliminationsTotal
Revenue$7,868 $12,414 $3,377 $— $29 $23,688 
Depreciation and amortization230 167 65 23 — 485 
Impairment losses— 198 — — — 198 
Gain/(loss) on sale of assets
10 — 43 (2)— 51 
Equity in (losses)/earnings of unconsolidated affiliates(2)— 2 — — — 
Income/(loss) before income taxes1,064 2,085 259 (353)— 3,055 
Net income/(loss) $1,064 $2,086 $231 $(1,065)$— $2,316 
Nine months ended September 30, 2021
(In millions)TexasEastWest/Services/OtherCorporateEliminationsTotal
Revenue$8,362 $9,002 $2,564 $— $15 $19,943 
Depreciation and amortization245 237 66 21 — 569 
Impairment losses— 306 — — — 306 
Gain on sale of assets— — 17 — — 17 
Equity in (losses)/earnings of unconsolidated affiliates(3)— 26 — — 23 
Income/(loss) before income taxes600 3,119 271 (536)— 3,454 
Net income/(loss)$600 $3,119 $239 $(1,344)$— $2,614