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CONDENSED STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME (Unaudited) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Statement of Comprehensive Income [Abstract]        
Net Income $ 293 $ 193 $ 788 $ 771
Other comprehensive income (loss):        
Adjustment to pension and other postretirement plans (net of tax of $-0-, $-0-, $-0- and $-0-) (2) 1 (1) 2
Net deferred gain from cash flow hedges (net of tax of $-0-, $-0-, $-0- and $1) 0 0 0 4
Reclassification of deferred gain from cash flow hedges realized in net income (net of tax of $-0-, $-0-, $-0- and $-0-) 0 (1) (1) (1)
Total (2) 0 (2) 5
Comprehensive income $ 291 $ 193 $ 786 $ 776