CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ 1,849	$ (25)	$ (3,112)
Change in value of pension and other postretirement liabilities:
Amortization of prior service cost and net (gain) loss, including (gain) loss on settlements and curtailments included in net periodic pension cost	[1]	(3)	2	3
Net actuarial gain (loss) incurred in period	[2]	34	11	(8)
Total change in value of pension and postretirement liabilities		31	13	(5)
Comprehensive income (loss)		$ 1,880	$ (12)	$ (3,117)

[1] Includes $0.4 million in tax effects for the year ended December 31, 2021, respectively, which was netted against a valuation allowance and therefore included in accumulated other comprehensive income. The year ended December 31, 2020 is presented net of $1 million in taxes.

[2] ncludes $1.1 million and $2.7 million in tax effect gains for the years ended December 31, 2022 and 2021, respectively, which were netted against a valuation allowance and therefore included in accumulated other comprehensive income. The year ended December 31, 2020 is presented net of $(2) million in taxes.