v3.26.3
TRANSACTIONS WITH AFFILIATED COMPANIES - Schedule of Transactions with Affiliated Companies (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Related Party Transaction [Line Items]        
Revenues $ 479 $ 464 $ 1,480 $ 1,367
Other operating expenses: [1] 74 68 233 226
Affiliates        
Related Party Transaction [Line Items]        
Revenues 5 4 19 13
Other operating expenses: 45 46 132 143
Interest income 2 3 7 12
Interest expense 1 0 1 2
Affiliates | Service        
Related Party Transaction [Line Items]        
Operating expenses capitalized 55 54 156 156
Affiliates | Ground lease expense        
Related Party Transaction [Line Items]        
Other operating expenses: 6 6 18 18
Affiliates | FESC support services        
Related Party Transaction [Line Items]        
Other operating expenses: 67 67 184 190
Affiliates | Other affiliate support services        
Related Party Transaction [Line Items]        
Other operating expenses: $ 27 $ 27 $ 86 $ 91
[1] Includes affiliated operating expenses of $45 million and $46 million for the three months ended September 30, 2026, and 2025, respectively, and $132 million and $143 million for the nine months ended September 30, 2026, and 2025, respectively.