Condensed Statements of Consolidated Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 325	$ 531
Other comprehensive income (loss):
Adjustment to pension and other postretirement plans (net of tax expense (benefit) of $0 and $0)	(1)	1
Reclassification of deferred loss from cash flow hedges realized in net income (net of tax of $-0- and $-0-)	0	1
Total	(1)	2
Comprehensive income	324	533
Income allocated to preferred shareholders	12	13
Comprehensive income available to common shareholders	$ 312	$ 520