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Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | $ 7,127 | $ 7,861 | $ 20,987 | $ 21,592
Mark-to-market for economic hedging activities | (1,630) | (53) | (283) | (1,933)
Contract amortization |  |  | (231) | (108)
Revenue | 7,223 | 7,946 | 21,311 | 22,016
Less: Revenues accounted for under topics other than ASC 606 and ASC 815 | 27 | 18 | 74 | 39
Derivative revenue | (1,635) | (54) | (283) | (1,909)
Corporate/Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | (9) | (5) | (25) | (11)
Revenue | (10) | (5) | (29) | (21)
Less: Revenues accounted for under topics other than ASC 606 and ASC 815 | 0 | 0 | 0 | 0
Retail revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 6,954 | 7,521 | 20,527 | 20,911
Derivative revenue | 6 | 14 | 25 | 57
Retail revenue | Corporate/Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | (4) | (1) | (12) | (1)
Derivative revenue | 0 | 0 | 0 | 0
Energy revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 128 | 261 | 390 | 472
Derivative revenue | 18 | 77 | 109 | 148
Energy revenue | Corporate/Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | (3) | (1) | (9) | 0
Derivative revenue | (3) | 0 | (8) | 1
Capacity revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 47 | 59 | 133 | 150
Derivative revenue | 17 | 27 | 58 | 50
Capacity revenue | Corporate/Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | (1) | (1) | (3) | (1)
Derivative revenue | 0 | 0 | 0 | 0
Derivative revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Mark-to-market for economic hedging activities | 8 | (70) | 32 | 96
Less: Realized and unrealized ASC 815 revenue | 69 | 67 | 250 | 385
Derivative revenue | Corporate/Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Mark-to-market for economic hedging activities | 1 | 0 | 3 | (11)
Less: Realized and unrealized ASC 815 revenue | (1) | 0 | (4) | (10)
Other revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 94 | 180 | 254 | 411
Contract amortization | (8) | (5) | (25) | (24)
Other revenue | Corporate/Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | (3) | (2) | (8) | (8)
Contract amortization | 0 | 0 | 0 | 0
Total operating revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 7,223 | 7,946 | 21,311 | 22,016
Total operating revenue | Corporate/Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (10) | (5) | (29) | (21)
Other revenue, derivative |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Derivative revenue | 20 | 19 | 26 | 34
Other revenue, derivative | Corporate/Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Derivative revenue | 1 | 0 | 1 | 0
Home | Retail revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 3,695 | 3,808 | 10,000 | 9,327
Home | Retail revenue | Corporate/Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | (4) | (1) | (12) | (1)
Business | Retail revenue |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 3,259 | 3,713 | 10,527 | 11,584
Business | Retail revenue | Corporate/Eliminations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 0 | 0 | 0 | 0
Texas | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 3,282 | 3,670 | 8,268 | 8,207
Revenue | 3,301 | 3,686 | 8,297 | 8,235
Less: Revenues accounted for under topics other than ASC 606 and ASC 815 | 0 | 0 | 0 | 0
Texas | Retail revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 3,231 | 3,489 | 8,101 | 7,842
Derivative revenue | 0 | 0 | 0 | 0
Texas | Energy revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 12 | 51 | 35 | 71
Derivative revenue | 0 | 0 | 0 | 0
Texas | Capacity revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 0 | 0 | 0 | 0
Derivative revenue | 0 | 0 | 0 | 0
Texas | Derivative revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Mark-to-market for economic hedging activities | 0 | 0 | 0 | 0
Less: Realized and unrealized ASC 815 revenue | 19 | 16 | 29 | 28
Texas | Other revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 58 | 146 | 161 | 322
Contract amortization | 0 | 0 | 0 | 0
Texas | Total operating revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 3,301 | 3,686 | 8,297 | 8,235
Texas | Other revenue, derivative | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Derivative revenue | 19 | 16 | 29 | 28
Texas | Home | Retail revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 2,235 | 2,397 | 5,361 | 5,196
Texas | Business | Retail revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 996 | 1,092 | 2,740 | 2,646
East | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 2,553 | 2,743 | 8,446 | 9,205
Revenue | 2,600 | 2,809 | 8,647 | 9,488
Less: Revenues accounted for under topics other than ASC 606 and ASC 815 | 14 | 8 | 36 | 13
East | Retail revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 2,468 | 2,633 | 8,257 | 9,007
Derivative revenue | 6 | 14 | 25 | 57
East | Energy revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 67 | 152 | 194 | 254
Derivative revenue | 9 | 77 | 67 | 137
East | Capacity revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 40 | 64 | 120 | 154
Derivative revenue | 17 | 27 | 58 | 50
East | Derivative revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Mark-to-market for economic hedging activities | 1 | (60) | 15 | 27
Less: Realized and unrealized ASC 815 revenue | 33 | 58 | 165 | 270
East | Other revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 31 | 26 | 84 | 70
Contract amortization | (7) | (6) | (23) | (24)
East | Total operating revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 2,600 | 2,809 | 8,647 | 9,488
East | Other revenue, derivative | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Derivative revenue | 0 | 0 | 0 | (1)
East | Home | Retail revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 616 | 544 | 1,855 | 1,641
East | Business | Retail revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 1,852 | 2,089 | 6,402 | 7,366
West/Services/Other | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 802 | 975 | 2,864 | 3,121
Revenue | 833 | 978 | 2,962 | 3,244
Less: Revenues accounted for under topics other than ASC 606 and ASC 815 | 13 | 10 | 38 | 26
West/Services/Other | Retail revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 760 | 922 | 2,747 | 2,993
Derivative revenue | 0 | 0 | 0 | 0
West/Services/Other | Energy revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 52 | 59 | 170 | 147
Derivative revenue | 12 | 0 | 50 | 10
West/Services/Other | Capacity revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 8 | (4) | 16 | (3)
Derivative revenue | 0 | 0 | 0 | 0
West/Services/Other | Derivative revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Mark-to-market for economic hedging activities | 6 | (10) | 14 | 80
Less: Realized and unrealized ASC 815 revenue | 18 | (7) | 60 | 97
West/Services/Other | Other revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 8 | 10 | 17 | 27
Contract amortization | (1) | 1 | (2) | 0
West/Services/Other | Total operating revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 833 | 978 | 2,962 | 3,244
West/Services/Other | Other revenue, derivative | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Derivative revenue | 0 | 3 | (4) | 7
West/Services/Other | Home | Retail revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 349 | 390 | 1,362 | 1,421
West/Services/Other | Business | Retail revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 411 | 532 | 1,385 | 1,572
Vivint Smart Home | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 499 | 478 | 1,434 | 1,070
Revenue | 499 | 478 | 1,434 | 1,070
Less: Revenues accounted for under topics other than ASC 606 and ASC 815 | 0 | 0 | 0 | 0
Vivint Smart Home | Retail revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 499 | 478 | 1,434 | 1,070
Derivative revenue | 0 | 0 | 0 | 0
Vivint Smart Home | Energy revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 0 | 0 | 0 | 0
Derivative revenue | 0 | 0 | 0 | 0
Vivint Smart Home | Capacity revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 0 | 0 | 0 | 0
Derivative revenue | 0 | 0 | 0 | 0
Vivint Smart Home | Derivative revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Mark-to-market for economic hedging activities | 0 | 0 | 0 | 0
Less: Realized and unrealized ASC 815 revenue | 0 | 0 | 0 | 0
Vivint Smart Home | Other revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 0 | 0 | 0 | 0
Contract amortization | 0 | 0 | 0 | 0
Vivint Smart Home | Total operating revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 499 | 478 | 1,434 | 1,070
Vivint Smart Home | Other revenue, derivative | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Derivative revenue | 0 | 0 | 0 | 0
Vivint Smart Home | Home | Retail revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | 499 | 478 | 1,434 | 1,070
Vivint Smart Home | Business | Retail revenue | Operating Segments |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue from contracts with customers | $ 0 | $ 0 | $ 0 | $ 0

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