Accumulated Other Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2022

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, 2020	$	101	$	(3)	$	98
Other comprehensive income (loss), net before reclassifications	—		—		—
Amounts reclassified from AOCI:
Amortization of actuarial lossesa	3		—		3
Tax expense (benefit)	(1)		—		(1)
Balance as of June 30, 2021	$	103	$	(3)	$	100
Balance as of December 31, 2021	$	356	$	(3)	$	353
Other comprehensive income (loss), net before reclassifications	—		6		6
Amounts reclassified from AOCI:
Amortization of actuarial lossesa	2		—		2
Balance as of June 30, 2022	$	358	$	3	$	361

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).