Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2021

Equity [Abstract]

Components of Accumulated Other Comprehensive Income, Net of Tax

The tables below present the components of the Company's accumulated other comprehensive income (loss), net of tax ("AOCI") (in millions):

	Pension and Other Postretirement Liabilities			Investments and Other		Deferred Taxes		Total
Balance at March 31, 2021	$	(1,084)		$	1	$	(43)	$	(1,126)
Changes in value	11			—		(2)		9
Amounts reclassified to earnings	5		(a)	—		(2)		3
Balance at June 30, 2021	$	(1,068)		$	1	$	(47)	$	(1,114)
Balance at December 31, 2020	$	(1,102)		$	2	$	(39)	$	(1,139)
Changes in value	24			(1)		(5)		18
Amounts reclassified to earnings	10		(a)	—		(3)		7
Balance at June 30, 2021	$	(1,068)		$	1	$	(47)	$	(1,114)
Balance at March 31, 2020	$	(613)		$	(14)	$	(144)	$	(771)
Changes in value	(721)			17		156		(548)
Amounts reclassified to earnings	77		(a)	—		(17)		60
Amounts reclassified to retained earnings	—			—		—		—
Balance at June 30, 2020	$	(1,257)		$	3	$	(5)	$	(1,259)
Balance at December 31, 2019	$	(560)		$	2	$	(160)	$	(718)
Changes in value	(770)			1		171		(598)
Amounts reclassified to earnings	73		(a)	—		(16)		57
Balance at June 30, 2020	$	(1,257)		$	3	$	(5)	$	(1,259)

(a) This AOCI component is included in the computation of net periodic pension and other postretirement costs (see Note 5 of this report for additional information).