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Revenue Recognition - Disaggregated Revenues (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | $ 31,488 | $ 26,777 | $ 8,690
Mark-to-market for economic hedging activities | 1,248 | 2,716 | (119)
Revenues | 31,543 | 26,989 | 9,093
Less: Revenues accounted for under topics other than ASC 606 and ASC 815 | 35 | (22) | 18
Retail Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Derivative revenue | 110 |  |
Retail Revenue | Home |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 10,761 | 9,549 | 6,331
Retail Revenue | Business |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 18,961 | 14,012 | 1,129
Total retail revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 29,722 | 23,561 | 7,460
Energy revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 1,250 | 1,215 | 539
Derivative revenue | (8) | 136 | 105
Capacity revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 272 | 775 | 680
Derivative revenue | 33 | 149 | 156
Derivative revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Mark-to-market for economic hedging activities | (83) | (164) | 95
Less: Realized and unrealized ASC 815 revenue | 20 | 234 | 385
Other revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 421 | 1,632 | 319
Contract amortization | (39) | (30) | 0
Total operating revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 31,543 | 26,989 | 9,093
Other derivative revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Derivative revenue | (32) | 113 | 29
Corporate/Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | (15) | (6) | (7)
Revenues | 17 | 10 | (4)
Less: Revenues accounted for under topics other than ASC 606 and ASC 815 | 1 | 0 | 0
Corporate/Eliminations | Retail Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Derivative revenue | 0 |  |
Corporate/Eliminations | Retail Revenue | Home |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | (1) | (1) | (2)
Corporate/Eliminations | Retail Revenue | Business |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 0 | 0 | 0
Corporate/Eliminations | Total retail revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | (1) | (1) | (2)
Corporate/Eliminations | Energy revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 32 | 7 | (1)
Derivative revenue | 31 | 3 | (5)
Corporate/Eliminations | Capacity revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 0 | 0 | (1)
Derivative revenue | 0 | 0 | 0
Corporate/Eliminations | Derivative revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Mark-to-market for economic hedging activities | 1 | 13 | 8
Less: Realized and unrealized ASC 815 revenue | 31 | 16 | 3
Corporate/Eliminations | Other revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | (15) | (9) | (8)
Contract amortization | 0 | 0 | 0
Corporate/Eliminations | Total operating revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 17 | 10 | (4)
Corporate/Eliminations | Other derivative revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Derivative revenue | (1) | 0 | 0
Texas | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 10,059 | 10,165 | 6,282
Revenues | 10,057 | 10,295 | 6,312
Less: Revenues accounted for under topics other than ASC 606 and ASC 815 | 0 | 0 | 0
Texas | Operating Segments | Retail Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Derivative revenue | 0 |  |
Texas | Operating Segments | Retail Revenue | Home |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 6,388 | 5,659 | 5,020
Texas | Operating Segments | Retail Revenue | Business |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 3,229 | 2,745 | 1,034
Texas | Operating Segments | Total retail revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 9,617 | 8,404 | 6,054
Texas | Operating Segments | Energy revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 111 | 329 | 24
Derivative revenue | 0 | 0 | 0
Texas | Operating Segments | Capacity revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 0 | 0 | 0
Derivative revenue | 0 | 0 | 0
Texas | Operating Segments | Derivative revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Mark-to-market for economic hedging activities | 2 | (3) | 2
Less: Realized and unrealized ASC 815 revenue | (2) | 130 | 30
Texas | Operating Segments | Other revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 327 | 1,565 | 232
Contract amortization | 0 | 0 | 0
Texas | Operating Segments | Total operating revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 10,057 | 10,295 | 6,312
Texas | Operating Segments | Other ancillary revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer |  | 1,300 |
Texas | Operating Segments | Other derivative revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Derivative revenue | (4) | 133 | 28
Texas | Corporate/Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | (4) | (5) | (6)
East | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 16,686 | 12,866 | 1,934
Revenues | 16,763 | 13,025 | 2,249
Less: Revenues accounted for under topics other than ASC 606 and ASC 815 | (7) | (25) | 1
East | Operating Segments | Retail Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Derivative revenue | 110 |  |
East | Operating Segments | Retail Revenue | Home |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 2,088 | 1,832 | 1,210
East | Operating Segments | Retail Revenue | Business |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 13,768 | 10,030 | 95
East | Operating Segments | Total retail revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 15,856 | 11,862 | 1,305
East | Operating Segments | Energy revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 641 | 508 | 183
Derivative revenue | (31) | 131 | 67
East | Operating Segments | Capacity revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 232 | 718 | 620
Derivative revenue | 33 | 149 | 156
East | Operating Segments | Derivative revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Mark-to-market for economic hedging activities | (30) | (88) | 88
Less: Realized and unrealized ASC 815 revenue | 84 | 184 | 314
East | Operating Segments | Other revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 104 | 51 | 53
Contract amortization | (40) | (26) | 0
East | Operating Segments | Total operating revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 16,763 | 13,025 | 2,249
East | Operating Segments | Other derivative revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Derivative revenue | 2 | (8) | 3
East | Corporate/Eliminations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 26 | 18 | 6
West/Services/Other | Operating Segments |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 4,758 | 3,752 | 481
Less: Revenues accounted for under topics other than ASC 606 and ASC 815 | 41 | 3 | 17
West/Services/Other | Operating Segments | Retail Revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Derivative revenue | 0 |  |
West/Services/Other | Operating Segments | Retail Revenue | Home |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 2,286 | 2,059 | 103
West/Services/Other | Operating Segments | Retail Revenue | Business |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 1,964 | 1,237 | 0
West/Services/Other | Operating Segments | Total retail revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 4,250 | 3,296 | 103
West/Services/Other | Operating Segments | Energy revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 466 | 371 | 333
Derivative revenue | (8) | 2 | 43
West/Services/Other | Operating Segments | Capacity revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 40 | 57 | 61
Derivative revenue | 0 | 0 | 0
West/Services/Other | Operating Segments | Derivative revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Mark-to-market for economic hedging activities | (56) | (86) | (3)
Less: Realized and unrealized ASC 815 revenue | (93) | (96) | 38
West/Services/Other | Operating Segments | Other revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from contract with customer | 5 | 25 | 42
Contract amortization | 1 | (4) | 0
West/Services/Other | Operating Segments | Total operating revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | 4,706 | 3,659 | 536
West/Services/Other | Operating Segments | Other derivative revenue |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Derivative revenue | $ (29) | $ (12) | $ (2)

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