Statements of Consolidated Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net loss	$ (194)	$ (1,377)
Other comprehensive income (loss), net of tax:
Employee benefit plans	(35)	5
Investments and other	21	0
Total other comprehensive income (loss), net of tax	(14)	5
Total comprehensive loss, net	$ (208)	$ (1,372)