XML 67 R52.htm IDEA: XBRL DOCUMENT 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