Future Contract Benefits - Summary of Gross Premiums and Interest Accretion (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Payout Annuities
Liability for Future Policy Benefit, Activity [Line Items]
Gross premiums	$ 99	$ 108	$ 116
Interest accretion	88	87	86
Traditional Life
Liability for Future Policy Benefit, Activity [Line Items]
Gross premiums	1,184	1,189	1,183
Interest accretion	$ 135	$ 135	$ 128

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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+ Details