Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 326	$ 362
Finite-Lived Intangible Assets, Net	312	353
2018	31
2019	29
2020	27
2021	25
2022	23
Thereafter	178
Amortization of intangible assets	47	55	$ 57
Goodwill	61	46
Goodwill, Acquired During Period	15
License
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	14	9
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	52	36
Finite-Lived Intangible Assets, Accumulated Amortization	6	3
Intangible assets	47	33
2018	4
2019	4
2020	4
2021	3
2022	3
Thereafter	$ 28
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years 4 months 24 days
Amortization of intangible assets	$ 3	3	0
Insurance Intangible Asset [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	1,247	1,278
Finite-Lived Intangible Assets, Accumulated Amortization	981	958
Intangible assets	266	320
2018	27
2019	25
2020	23
2021	21
2022	19
Thereafter	$ 149
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years 3 months 18 days
Amortization of intangible assets	$ 44	$ 52	$ 57