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Life Policy and Investment Contract Reserves (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Life Policy Reserves
Liability for Future Policy Benefit, Activity
Discount Rate Assumption Changes included in Impact of flooring at Cohort Level	$ 3	$ 2	$ 9

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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