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Segment Reporting
 12 Months Ended
Dec. 31, 2022
Segment Reporting [Abstract]  
Segment Reporting Segment Reporting
The Company’s segment structure reflects how management 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).
The Company had no customer that comprised more than 10% of the Company's consolidated revenues during the years ended December 31, 2022, 2021 and 2020.
Intersegment sales are accounted for at market.
For the Year Ended December 31, 2022
(In millions)TexasEastWest/Services/Other
Corporate(a)
Eliminations
Total
Revenues(a)
$10,057 $16,763 $4,706 $— $17 $31,543 
Operating expenses8,495 16,031 4,108 86 17 28,737 
Depreciation and amortization310 208 85 31 — 634 
Impairment losses— 206 — — — 206 
Total operating cost and expenses8,805 16,445 4,193 117 17 29,577 
Gain on sale of assets10 — 45 (3)— 52 
Operating income1,262 318 558 (120)— 2,018 
Equity in (losses)/earnings of unconsolidated affiliates(2)— 8 — — 6 
Other income, net5 10 3 54 (16)56 
Interest expense— (1)(32)(400)16 (417)
Income/(loss) before income taxes1,265 327 537 (466)— 1,663 
Income tax expense— 1 57 384 — 442 
Net income/(loss) $1,265 $326 $480 $(850)$— $1,221 
Balance sheet
Equity investments in affiliates$— $— $133 $— $— $133 
Capital expenditures273 7 37 50 — 367 
Goodwill710 723 217 — — 1,650 
Total assets$11,475 $19,526 $8,139 $35,780 $(45,774)$29,146 
(a) Inter-segment sales and inter-segment net derivative gains and losses included in revenues
$4 $(26)$5 $— $— $(17)
 For the Year Ended December 31, 2021
(In millions)TexasEastWest/Services/Other
Corporate(a)
Eliminations
Total
Revenues(a)
$10,295 $13,025 $3,659 $— $10 $26,989 
Operating expenses8,692 10,256 3,467 141 10 22,566 
Depreciation and amortization336 333 88 28 — 785 
Impairment losses— 535 9 — — 544 
Total operating cost and expenses9,028 11,124 3,564 169 10 23,895 
Gain on sale of assets19 — 17 211 — 247 
Operating income1,286 1,901 112 42 — 3,341 
Equity in (losses)/earnings of unconsolidated affiliates(3)— 20 — — 17 
Other income, net 8 7 3 59 (14)63 
Loss on debt extinguishment— — — (77)— (77)
Interest expense(1)(1)(28)(469)14 (485)
Income/(loss) before income taxes1,290 1,907 107 (445)— 2,859 
Income tax expense— — 19 653 — 672 
Net income/(loss) $1,290 $1,907 $88 $(1,098)$— $2,187 
Balance sheet
Equity investments in affiliates$— $— $157 $— $— $157 
Capital expenditures153 50 21 45 — 269 
Goodwill716 853 226 — — 1,795 
Total assets$12,271 $13,645 $4,673 $19,051 $(26,458)$23,182 
(a) Inter-segment sales and inter-segment net derivative gains and losses included in revenues
$5 $(18)$3 $— $— $(10)
 For the Year Ended December 31, 2020
(In millions)TexasEastWest/Services/Other
Corporate(a)
Eliminations Total
Revenues(a)
$6,312 $2,249 $536 $— $(4)$9,093 
Operating expenses5,251 1,755 422 57 (4)7,481 
Depreciation and amortization233 132 36 34 — 435 
Impairment losses14 — 61 — — 75 
Total operating cost and expenses5,498 1,887 519 91 (4)7,991 
(Loss)/gain on sale of assets— — (2)5 — 3 
Operating income/(loss)814 362 15 (86)— 1,105 
Equity in (losses)/earnings of unconsolidated affiliates(12)— 29 — — 17 
Impairment losses on investments(18)— — — — (18)
Other income, net11 7 8 41 — 67 
Loss on debt extinguishment— (4)(5)— — (9)
Interest expense— (14)(3)(384)— (401)
Income/(loss) before income taxes795 351 44 (429)— 761 
Income tax (benefit)/expense— (1)2 250 — 251 
Net income/(loss)$795 $352 $42 $(679)$— $510 
(a) Inter-segment sales and inter-segment net derivative gains and losses included in revenues
$6 $(6)$4 $— $— $4