Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 362	$ 409
Finite-Lived Intangible Assets, Net	353	409
2018	36
2019	33
2020	31
2021	28
2022	25
Thereafter	200
Amortization of intangible assets	55	57	$ 295
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	36	36
Finite-Lived Intangible Assets, Accumulated Amortization	3	0
Intangible assets	33	36
2018	3
2019	3
2020	3
2021	3
2022	2
Thereafter	$ 20
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years 8 months 12 days
Amortization of intangible assets	$ 3	0	0
Insurance Intangible Asset [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	1,278	1,281
Finite-Lived Intangible Assets, Accumulated Amortization	958	908
Intangible assets	320	373
2018	34
2019	30
2020	28
2021	25
2022	23
Thereafter	$ 180
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years 3 months 18 days
Amortization of intangible assets	$ 52	$ 57	$ 295