CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ (2,675)	$ 80
Change in value of pension and other postretirement liabilities:
Settlement adjustment	[1]	0	0
Total comprehensive loss		$ (2,675)	$ 80

[1] Settlement adjustment was less than $1 million for the three months ended March 31, 2022.