Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Goodwill

A summary of the changes in the carrying amount of goodwill is as follows:

	CNA Financial		Boardwalk Pipelines		Corporate		Total
(In millions)
Balance, December 31, 2020	$	112	$	237	$	436	$	785
Deconsolidation of Altium Packaging (see Note 2)					(436)		(436)
Balance, December 31, 2021	112		237		—		349
Other adjustments	(3)						(3)
Balance, December 31, 2022	$	109	$	237	$	—	$	346

Summary of Other Intangible Assets

A summary of the net carrying amount of other intangible assets is as follows:

	December 31, 2022				December 31, 2021
	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
(In millions)
Finite-lived intangible assets:
Customer relationships	$	59	$	19	$	59	$	17
Other	17		14		19		15
Total finite-lived intangible assets	76		33		78		32
Indefinite-lived intangible assets	68				63
Total other intangible assets	$	144	$	33	$	141	$	32