Statements of Consolidated Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 329	$ (434)	$ (1,048)	$ (1,791)
Other comprehensive income (loss), net of tax:
Employee benefit plans	4	12	9	26
Investments and other	(11)	0	(11)	(1)
Total other comprehensive income (loss), net of tax	(7)	12	(2)	25
Total comprehensive income (loss), net	$ 322	$ (422)	$ (1,050)	$ (1,766)