Accumulated Other Comprehensive Income (Tables)

3 Months Ended

Mar. 31, 2023

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following table provides the components of accumulated other comprehensive income (loss) (AOCI) by component (in millions):

	Pension and Retiree Health and Welfare Benefit Items		Equity Method Investments		Accumulated Other Comprehensive Income (Loss)
Balance as of December 31, 2021	$	356	$	(3)	$	353
Other comprehensive income (loss), net before reclassifications	—		4		4
Amounts reclassified from AOCI:
Amortization of actuarial (gains) lossesa	1		—		1
Balance as of March 31, 2022	$	357	$	1	$	358
Balance as of December 31, 2022	$	185	$	9	$	194
Other comprehensive income (loss), net before reclassifications	—		(1)		(1)
Amounts reclassified from AOCI:
Amortization of actuarial (gains) lossesa	(9)		—		(9)
Tax expense (benefit)	3		—		3
Balance as of March 31, 2023	$	179	$	8	$	187

a     This accumulated other comprehensive income component is included in the computation of net periodic pension and retiree health and welfare costs (see Note 6 for additional details on pension costs).