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v3.24.3

Segment Information - Generation Total Revenues (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |
Revenues from contracts with customers | $ 4,773 | $ 5,313 | $ 14,438 | $ 15,845
Revenues not from contracts | 1,777 | 798 | 3,748 | 3,277
Operating revenues | 6,550 | 6,111 | 18,186 | 19,122
Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 5,351 | 5,191 | 14,672 | 14,402
Mid-Atlantic | Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 1,603 | 1,411 | 4,148 | 3,854
Midwest | Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 1,275 | 1,117 | 3,537 | 3,479
New York | Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 507 | 512 | 1,534 | 1,518
ERCOT | Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 523 | 559 | 1,201 | 1,056
Other Power Regions | Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 1,443 | 1,592 | 4,252 | 4,495
Operating Segments | Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from contracts with customers | 4,454 | 4,948 | 13,025 | 14,016
Revenues not from contracts | 897 | 243 | 1,647 | 386
Operating revenues | 5,351 | 5,191 | 14,672 | 14,402
Operating Segments | Mid-Atlantic | Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from contracts with customers | 1,504 | 1,493 | 4,154 | 4,140
Revenues not from contracts | 97 | (78) | (10) | (241)
Operating revenues | 1,601 | 1,415 | 4,144 | 3,899
Operating Segments | Midwest | Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from contracts with customers | 958 | 1,160 | 2,951 | 3,707
Revenues not from contracts | 316 | (43) | 584 | (231)
Operating revenues | 1,274 | 1,117 | 3,535 | 3,476
Operating Segments | New York | Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from contracts with customers | 472 | 522 | 1,428 | 1,424
Revenues not from contracts | 39 | (14) | 102 | 53
Operating revenues | 511 | 508 | 1,530 | 1,477
Operating Segments | ERCOT | Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from contracts with customers | 307 | 489 | 819 | 979
Revenues not from contracts | 215 | 69 | 378 | 73
Operating revenues | 522 | 558 | 1,197 | 1,052
Operating Segments | Other Power Regions | Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from contracts with customers | 1,213 | 1,284 | 3,673 | 3,766
Revenues not from contracts | 230 | 309 | 593 | 732
Operating revenues | 1,443 | 1,593 | 4,266 | 4,498
Intersegment Revenues | Mid-Atlantic | Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 2 | (4) | 4 | (45)
Intersegment Revenues | Midwest | Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 1 | 0 | 2 | 3
Intersegment Revenues | New York | Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | (4) | 4 | 4 | 41
Intersegment Revenues | ERCOT | Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 1 | 1 | 4 | 4
Intersegment Revenues | Other Power Regions | Electricity |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating revenues | 0 | (1) | (14) | (3)
Segment Reconciling Items | Natural Gas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from contracts with customers | 184 | 220 | 1,024 | 1,394
Revenues not from contracts | 349 | 385 | 1,252 | 1,352
Operating revenues | 533 | 605 | 2,276 | 2,746
Segment Reconciling Items | Product and Service, Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues from contracts with customers | 135 | 145 | 389 | 435
Revenues not from contracts | 531 | 170 | 849 | 1,539
Operating revenues | 666 | 315 | 1,238 | 1,974
Unrealized mark-to-market gains (losses) | $ 516 | $ 177 | $ 769 | $ 1,317

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