STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Other Comprehensive Income [Abstract]
Net income (loss)	$ 917	$ 1,057	$ 1,486
Other comprehensive income (loss):
Adjustment to pension and other postemployment plans	(5)	32	21
Net deferred gain from cash flow hedges	1	0	0
Reclassification of net deferred losses from cash flow hedges, tax	0	1	2
Other comprehensive income (loss) from unconsolidated affiliates (net of tax of $-0-, $-0-, and $-0-, respectively)	0	0	3
Total	(4)	33	26
Comprehensive income	913	1,090	1,512
Income allocated to preferred shareholders	50	49	95
Comprehensive income available to common shareholders	$ 863	$ 1,041	$ 1,417