STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Other Comprehensive Income [Abstract]
Net income	$ 1,019	$ 917	$ 1,057
Other comprehensive income (loss):
Adjustment to pension and other postemployment plans (net of tax expense (benefit) of $4, ($1) and $2, respectively)	15	(5)	32
Net deferred gain from cash flow hedges (net of tax of $-0-, $-0- and $-0-)	4	1	0
Reclassification of deferred (gain) loss from cash flow hedges realized in net income (net of tax of $-0-, $-0- and $-0-)	(1)	0	1
Total	18	(4)	33
Comprehensive income	1,037	913	1,090
Income allocated to preferred shareholders	0	50	49
Comprehensive income available to common shareholders	$ 1,037	$ 863	$ 1,041