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v3.25.1

Segment Information - Generation Total Revenues (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Segment Reporting Information [Line Items] |  |
Revenues from contracts with customers | $ 6,106 | $ 5,260
Other revenues | 682 | 901
Total Operating revenues | 6,788 | 6,161
Total Purchased power and fuel expenses | (4,384) | (3,417)
Total RNF | 2,404 | 2,744
Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Revenues from contracts with customers | 5,269 | 4,522
Other revenues | 316 | 272
Total Operating revenues | 5,585 | 4,794
Total Purchased power and fuel expenses | (3,117) | (2,496)
Total RNF | 2,468 | 2,298
Operating Segments | Mid-Atlantic |  |
Segment Reporting Information [Line Items] |  |
Revenues from contracts with customers | 1,606 | 1,356
Other revenues | 59 | (114)
Total Operating revenues | 1,665 | 1,242
Total Purchased power and fuel expenses | (856) | (568)
Total RNF | 809 | 674
Operating Segments | Midwest |  |
Segment Reporting Information [Line Items] |  |
Revenues from contracts with customers | 1,310 | 1,000
Other revenues | 94 | 94
Total Operating revenues | 1,404 | 1,094
Total Purchased power and fuel expenses | (554) | (391)
Total RNF | 850 | 703
Operating Segments | New York |  |
Segment Reporting Information [Line Items] |  |
Revenues from contracts with customers | 675 | 492
Other revenues | (113) | 21
Total Operating revenues | 562 | 513
Total Purchased power and fuel expenses | (161) | (169)
Total RNF | 401 | 344
Operating Segments | ERCOT |  |
Segment Reporting Information [Line Items] |  |
Revenues from contracts with customers | 301 | 237
Other revenues | 97 | 84
Total Operating revenues | 398 | 321
Total Purchased power and fuel expenses | (184) | (112)
Total RNF | 214 | 209
Operating Segments | Other Power Regions |  |
Segment Reporting Information [Line Items] |  |
Revenues from contracts with customers | 1,377 | 1,437
Other revenues | 179 | 187
Total Operating revenues | 1,556 | 1,624
Total Purchased power and fuel expenses | (1,362) | (1,256)
Total RNF | 194 | 368
Segment Reconciling Items |  |
Segment Reporting Information [Line Items] |  |
Revenues from contracts with customers | 837 | 738
Other revenues | 366 | 629
Total Operating revenues | 1,203 | 1,367
Total Purchased power and fuel expenses | (1,267) | (921)
Total RNF | (64) | 446
Unrealized mark-to-market gains (losses) | 711 | 608
Segment Reconciling Items | Product and Service, Other |  |
Segment Reporting Information [Line Items] |  |
Unrealized mark-to-market gains (losses) | $ (287) | $ 64

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