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Segment Reporting
 6 Months Ended
Jun. 30, 2022
Segment Reporting [Abstract]  
Segment Reporting Segment Reporting
The Company’s segment structure reflects how management currently operates and allocates resources. The Company’s businesses are segregated based on conventional power generation, renewable businesses which consist of solar and wind, and the Thermal Business, which was sold to KKR on May 1, 2022, as further described in Note 3, Acquisitions and Dispositions. The Corporate segment reflects the Company’s corporate costs and includes eliminating entries. The Company’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, and CAFD, as well as net income (loss).
Three months ended June 30, 2022
(In millions)Conventional GenerationRenewables
Thermal (a)
Corporate (b)
Total
Operating revenues$103 $247 $18 $— $368 
Cost of operations, exclusive of depreciation, amortization and accretion shown separately below28 73 11 — 112 
Depreciation, amortization and accretion33 93 — — 126 
General and administrative— — 1 10 11 
Transaction and integration costs— — — 3 3 
Development costs— — 1 — 1 
Total operating costs and expenses61 166 13 13 253 
Gain on sale of business— — — 1,291 1,291 
Operating income 42 81 5 1,278 1,406 
Equity in earnings of unconsolidated affiliates1 9 — — 10 
Other income, net— 4 — 1 5 
Interest expense(10)(11)(1)(25)(47)
Income before income taxes 33 83 4 1,254 1,374 
Income tax expense— — — 225 225 
Net Income $33 $83 $4 $1,029 $1,149 
Total Assets (a)
2,363 9,446 — 839 12,648 
(a) The Thermal Business was sold on May 1, 2022.
(b) Includes eliminations.
Three months ended June 30, 2021
(In millions)Conventional GenerationRenewablesThermalCorporateTotal
Operating revenues$109 $222 $49 $— $380 
Cost of operations, exclusive of depreciation, amortization and accretion shown separately below23 54 31 (1)107 
Depreciation, amortization and accretion31 89 8 — 128 
General and administrative— 1 — 9 10 
Transaction and integration costs — — — 1 1 
Development costs— — 1 — 1 
Operating income (loss)
55 78 9 (9)133 
Equity in earnings of unconsolidated affiliates2 6 — — 8 
Other (expense) income, net(1)1 1 — 1 
Interest expense(16)(58)(4)(25)(103)
Income (loss) before income taxes40 27 6 (34)39 
Income tax expense— — — 7 7 
Net Income (Loss)$40 $27 $6 $(41)$32 
Six months ended June 30, 2022
(In millions)Conventional GenerationRenewables
Thermal (a)
Corporate (b)
Total
Operating revenues$211 $294 $77 $— $582 
Cost of operations, exclusive of depreciation, amortization and accretion shown separately below49 141 50 — 240 
Depreciation, amortization and accretion66 184 — — 250 
General and administrative— — 2 21 23 
Transaction and integration costs— — — 5 5 
Development costs— — 2 — 2 
Total operating costs and expenses115 325 54 26 520 
Gain on sale of business— — — 1,291 1,291 
Operating income (loss)96 (31)23 1,265 1,353 
Equity in earnings of unconsolidated affiliates2 12 — — 14 
Other income, net— 4 — 1 5 
Loss on debt extinguishment— (2)— — (2)
Interest expense(18)(19)(6)(51)(94)
Income (loss) before income taxes 80 (36)17 1,215 1,276 
Income tax expense— — — 224 224 
Net Income (Loss)$80 $(36)$17 $991 $1,052 
(a) The Thermal Business was sold on May 1, 2022.
(b) Includes eliminations.
Six months ended June 30, 2021
(In millions)Conventional GenerationRenewablesThermalCorporateTotal
Operating revenues$211 $308 $98 $— $617 
Cost of operations, exclusive of depreciation, amortization and accretion shown separately below50 106 62 (1)217 
Depreciation, amortization and accretion65 176 15 — 256 
General and administrative— 1 1 18 20 
Transaction and integration costs— — — 3 3 
Development costs— — 2 — 2 
Operating income (loss)
96 25 18 (20)119 
Equity in earnings of unconsolidated affiliates4 8 — — 12 
Other income, net— 1 1 — 2 
Loss on debt extinguishment— (1)— (41)(42)
Interest expense(27)(62)(9)(50)(148)
Income (loss) before income taxes
73 (29)10 (111)(57)
Income tax benefit— — — (13)(13)
Net Income (Loss)$73 $(29)$10 $(98)$(44)