Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2021

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

Schedule of Accumulated Other Comprehensive Income (Loss)

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

	Pension and Retiree Health and Welfare Benefit Items		Equity Method Investments		Total
Balance as of December 31, 2018	$	133	$	(3)	$	130
Other comprehensive income (loss) before reclassifications, net of $4 million tax expense	16		(1)		15
Amounts reclassified from AOCI:
Amortization of prior service creditsa	(4)		—		(4)
Settlement (gain) lossa	5		—		5
Tax expense (benefit)	(1)		—		(1)
Balance as of December 31, 2019	$	149	$	(4)	$	145
Other comprehensive income (loss) before reclassifications, net of $17 million tax benefit	(48)		1		(47)
Amounts reclassified from AOCI:
Amortization of actuarial lossesa	2		—		2
Settlement (gain) lossa	(1)		—		(1)
Tax expense (benefit)	(1)		—		(1)
Balance as of December 31, 2020	$	101	$	(3)	$	98
Other comprehensive income (loss) before reclassifications, net of $81 million tax expense	251		—		251
Amounts reclassified from AOCI:
Amortization of actuarial lossesa	6		—		6
Settlement (gain) lossa	(1)		—		(1)
Tax expense (benefit)	(1)		—		(1)
Balance at December 31, 2021	$	356	$	(3)	$	353

a     This accumulated other comprehensive income component is included in the computation of net periodic pension cost (see Note 14 for additional details).