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CONDENSED STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME (Unaudited) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Statement of Comprehensive Income [Abstract]        
Net Income $ 198 $ 228 $ 495 $ 578
Other comprehensive income (loss):        
Adjustment to pension and other postretirement plans (net of tax of $-0-, $-0-, $-0- and $-0-) 1 2 1 1
Net deferred gain from cash flow hedges (net of tax of $-0-, $1, $-0- and $1) 0 1 0 4
Reclassification of deferred gain from cash flow hedges realized in net income (net of tax of $-0-, $-0-, $-0- and $-0-) (1) 0 (1) 0
Total 0 3 0 5
Comprehensive income $ 198 $ 231 $ 495 $ 583