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Revenue and Interest Recognized in Income (Details) - Life policy reserves: - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Liability for Future Policy Benefit, Activity [Line Items]
Gross premiums	$ 90	$ 87	$ 268	$ 262
Interest accretion	19	18	57	55
Term Life Insurance
Liability for Future Policy Benefit, Activity [Line Items]
Gross premiums	76	72	227	221
Interest accretion	13	12	39	38
Whole Life Insurance
Liability for Future Policy Benefit, Activity [Line Items]
Gross premiums	14	15	41	41
Interest accretion	$ 6	$ 6	$ 18	$ 17

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