CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended								9 Months Ended
	Sep. 30, 2022		Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021		Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022		Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 450		$ 1,173	$ (2,675)	$ (1,857)		$ (609)	$ 80	$ (1,052)		$ (2,386)
Change in value of pension and other postretirement liabilities:
Settlement adjustment	0	[1]			1	[1]	3		0	[1]	4	[1]
Comprehensive income (loss)	$ 450		$ 1,173	$ (2,675)	$ (1,856)		$ (606)	$ 80	$ (1,052)		$ (2,382)

[1] Settlement adjustment was less than $1 million for the three and nine months ended September 30, 2022. Settlement adjustments reflect $1 million in tax benefits for the nine months ended September 30, 2021.