Statements of Consolidated Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 1,075	$ 329	$ 881	$ (1,048)
Other comprehensive income (loss), net of tax:
Employee benefit plans	(34)	4	(69)	9
Investments and other	(24)	(11)	(3)	(11)
Total other comprehensive loss, net of tax	(58)	(7)	(72)	(2)
Total comprehensive income (loss), net	$ 1,017	$ 322	$ 809	$ (1,050)