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Segment Information (Tables) | 3 Months Ended
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Mar. 31, 2025
Segment Reporting [Abstract] |
Revenue from External Customers by Geographic Areas | The following tables disaggregate the revenue recognized from contracts with customers into categories that depict how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. The disaggregation of revenues reflects our power sales by geographic region. The following tables, which relate directly to our Consolidated Statements of Operations and Comprehensive Income, provide the reconciliation of operating revenues, purchased power and fuel expenses, and RNF for our reportable segments for the three months ended March 31, 2025 and 2024.
| Three Months Ended March 31, 2025
| Revenues from contracts with customers |  | Other revenues(a) |  | Total Operating revenues |  | Total Purchased power and fuel expenses |  | Total RNF
Mid-Atlantic | $ | 1,606 |  |  | $ | 59 |  |  | $ | 1,665 |  |  | $ | (856) |  |  | $ | 809 |
Midwest | 1,310 |  |  | 94 |  |  | 1,404 |  |  | (554) |  |  | 850 |
New York | 675 |  |  | (113) |  |  | 562 |  |  | (161) |  |  | 401 |
ERCOT | 301 |  |  | 97 |  |  | 398 |  |  | (184) |  |  | 214 |
Other Power Regions | 1,377 |  |  | 179 |  |  | 1,556 |  |  | (1,362) |  |  | 194 |
Total Reportable Segments | 5,269 |  |  | 316 |  |  | 5,585 |  |  | (3,117) |  |  | 2,468 |
Other(b) | 837 |  |  | 366 |  |  | 1,203 |  |  | (1,267) |  |  | (64) |
Total Consolidated Results | $ | 6,106 |  |  | $ | 682 |  |  | $ | 6,788 |  |  | $ | (4,384) |  |  | $ | 2,404 |
| Three Months Ended March 31, 2024
| Revenues from contracts with customers |  | Other revenues(a) |  | Total Operating revenues |  | Total Purchased power and fuel expenses |  | Total RNF
Mid-Atlantic | $ | 1,356 |  |  | $ | (114) |  |  | $ | 1,242 |  |  | $ | (568) |  |  | $ | 674 |
Midwest | 1,000 |  |  | 94 |  |  | 1,094 |  |  | (391) |  |  | 703 |
New York | 492 |  |  | 21 |  |  | 513 |  |  | (169) |  |  | 344 |
ERCOT | 237 |  |  | 84 |  |  | 321 |  |  | (112) |  |  | 209 |
Other Power Regions | 1,437 |  |  | 187 |  |  | 1,624 |  |  | (1,256) |  |  | 368 |
Total Reportable Segments | 4,522 |  |  | 272 |  |  | 4,794 |  |  | (2,496) |  |  | 2,298 |
Other(b) | 738 |  |  | 629 |  |  | 1,367 |  |  | (921) |  |  | 446 |
Total Consolidated Results | $ | 5,260 |  |  | $ | 901 |  |  | $ | 6,161 |  |  | $ | (3,417) |  |  | $ | 2,744 |
__________ (a)Includes revenues from nuclear PTCs as well as derivatives and leases. Intersegment activity in all periods presented is not material. (b)Represents revenue activities not allocated to a region. See text above for a description of included activities. Revenues from contracts with customers includes natural gas revenues of $711 million and $608 million and other revenues includes unrealized mark-to-market losses of $287 million and gains of $64 million, for the three months ended March 31, 2025 and 2024, respectively.

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- Definition Tabular disclosure of revenue from external customers by geographic areas attributed to the entity's country of domicile and to foreign countries from which the entity derives revenue. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-41 + Details
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