Other Intangible Assets (Summary of Other Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Schedule of Other Intangible Assets [Abstract]
Indefinite-lived intangible assets:	$ 76	$ 68
Total other intangible assets	86	78
Accumulated Amortization	8	7
Syndicate capacity
Schedule of Other Intangible Assets [Abstract]
Indefinite-lived intangible assets:	45	42
Agency force
Schedule of Other Intangible Assets [Abstract]
Indefinite-lived intangible assets:	16	16
Insurance licenses
Schedule of Other Intangible Assets [Abstract]
Indefinite-lived intangible assets:	$ 15	10
Distribution channel
Schedule of Other Intangible Assets [Abstract]
Economic Useful Life	15 years
Finite-lived intangible assets:	$ 10	10
Accumulated Amortization	$ 8	$ 7