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Revenue (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 USD ($) company MW | Jun. 30, 2021 USD ($) | Jun. 30, 2022 USD ($) company MW | Jun. 30, 2021 USD ($)
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | $ 2,806 | $ 2,610 | $ 5,776 | $ 5,353
Total revenues | [1] | 2,818 | 2,622 | 5,807 | 5,348
Other Non-Customer Revenue |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Late payment charges |  | 9 | 9 | 19 | 18
Distribution services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 1,188 | 1,278 | 2,508 | 2,591
Retail generation |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 982 | 818 | 2,059 | 1,741
Wholesale sales |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 167 | 77 | 263 | 150
Transmission |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 440 | 411 | 891 | 812
Other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 29 | 26 | 55 | 59
ARP |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  |  |  |  | (27)
Other non-customer revenue |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  | 12 | 12 | 31 | 22
Derivative revenue | Other Non-Customer Revenue |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Late payment charges |  | 2 | 2 | 11 | 2
Regulated Distribution |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | $ 2,215 | 2,135 | $ 4,657 | 4,409
Number of existing utility operating companies | company |  | 10 |  | 10 |
Megawatts of net demonstrated capacity of competitive segment | MW |  | 3,580 |  | 3,580 |
Utility customer payment period |  |  |  | 30 days |
Regulated Distribution | Residential |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | $ 1,310 | 1,287 | $ 2,852 | 2,744
Regulated Distribution | Commercial |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 575 | 562 | 1,172 | 1,103
Regulated Distribution | Industrial |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 312 | 268 | 595 | 526
Regulated Distribution | Other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 18 | 18 | 38 | 36
Regulated Transmission |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 440 | 411 | 891 | 812
Regulated Transmission | ATSI |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 217 | 193 | 434 | 398
Regulated Transmission | TrAIL |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 64 | 57 | 127 | 117
Regulated Transmission | MAIT |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 77 | 80 | 156 | 147
Regulated Transmission | JCP&L |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 46 | 46 | 106 | 85
Regulated Transmission | MP, PE and WP |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 36 | 35 | 68 | 65
Operating Segments | Regulated Distribution |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 2,403 | 2,235 | 4,961 | 4,611
Total revenues |  | 2,426 | 2,258 | 5,015 | 4,628
Operating Segments | Regulated Distribution | Distribution services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 1,216 | 1,304 | 2,564 | 2,643
Operating Segments | Regulated Distribution | Retail generation |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 999 | 831 | 2,093 | 1,766
Operating Segments | Regulated Distribution | Wholesale sales |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 159 | 74 | 249 | 143
Operating Segments | Regulated Distribution | Transmission |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 0 | 0 | 0 | 0
Operating Segments | Regulated Distribution | Other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 29 | 26 | 55 | 59
Operating Segments | Regulated Distribution | ARP |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  |  |  |  | (27)
Operating Segments | Regulated Distribution | Other non-customer revenue |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  | 23 | 23 | 54 | 44
Operating Segments | Regulated Transmission |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 440 | 411 | 891 | 812
Total revenues |  | 441 | 419 | 894 | 824
Operating Segments | Regulated Transmission | Distribution services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 0 | 0 | 0 | 0
Operating Segments | Regulated Transmission | Retail generation |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 0 | 0 | 0 | 0
Operating Segments | Regulated Transmission | Wholesale sales |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 0 | 0 | 0 | 0
Operating Segments | Regulated Transmission | Transmission |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 440 | 411 | 891 | 812
Operating Segments | Regulated Transmission | Other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 0 | 0 | 0 | 0
Operating Segments | Regulated Transmission | ARP |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  |  |  |  |
Operating Segments | Regulated Transmission | Other non-customer revenue |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  | 1 | 8 | 3 | 12
Corporate/Other and Reconciling Adjustments |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | (37) | (36) | (76) | (70)
Total revenues |  | (49) | (55) | (102) | (104)
Corporate/Other and Reconciling Adjustments | Distribution services |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | (28) | (26) | (56) | (52)
Corporate/Other and Reconciling Adjustments | Retail generation |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | (17) | (13) | (34) | (25)
Corporate/Other and Reconciling Adjustments | Wholesale sales |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 8 | 3 | 14 | 7
Corporate/Other and Reconciling Adjustments | Transmission |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 0 | 0 | 0 | 0
Corporate/Other and Reconciling Adjustments | Other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues from contracts with customers |  | 0 | 0 | 0 | 0
Corporate/Other and Reconciling Adjustments | ARP |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  |  |  |  | 0
Corporate/Other and Reconciling Adjustments | Other non-customer revenue |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Total revenues |  | $ (12) | $ (19) | $ (26) | $ (34)
[1] | Includes excise and gross receipts tax collections of $91 million and $85 million during the three months ended June 30, 2022 and 2021, respectively, and $194 million and $180 million during the six months ended June 30, 2022 and 2021, respectively.

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