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Goodwill and Other Intangibles - Changes in the carrying value of goodwill (Details) - USD ($) $ in Millions		12 Months Ended
	Dec. 06, 2021	Dec. 31, 2021
Goodwill [Line Items]
Goodwill, beginning balance		$ 176
Goodwill, ending balance		246
Verikai, Inc.
Goodwill [Line Items]
Goodwill acquired during period	$ 70	$ 70

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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