Statements of Consolidated Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (1,377)	$ (1,357)
Other comprehensive income (loss), net of tax:
Employee benefit plans	5	14
Investments and other	0	(1)
Total other comprehensive income, net of tax	5	13
Total comprehensive loss, net	$ (1,372)	$ (1,344)