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Condensed Statements of Consolidated Comprehensive Income (Unaudited) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Statement of Comprehensive Income [Abstract]        
Adjustment to pension and other postretirement plans, tax $ 0 $ 0 $ 0 $ 0
Net deferred gain from cash flow hedges, tax 0 0 1 0
Reclassification of deferred gain from cash flow hedges realized in net income net of tax $ 0 $ 0 $ 0 $ 0