Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Intangible assets	$ 350		$ 362
Amortization of intangible assets	14	$ 19
2019	26
2020	32
2021	30
2022	27
2023	25
Thereafter	196
Finite-Lived Intangible Assets, Net	336		353
PWIC
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	14		9
Insurance Intangible Asset [Member]
Intangible Assets, Gross (Excluding Goodwill)	1,264		1,278
Finite-Lived Intangible Assets, Accumulated Amortization	961		958
Intangible assets	303		320
Amortization of intangible assets	14	19
2019	24
2020	30
2021	27
2022	25
2023	22
Thereafter	$ 176
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years 3 months 18 days
Other Intangible Assets
Intangible Assets, Gross (Excluding Goodwill)	$ 36		36
Finite-Lived Intangible Assets, Accumulated Amortization	3		3
Intangible assets	32		$ 33
Amortization of intangible assets	1	$ 1
2019	2
2020	3
2021	3
2022	3
2023	2
Thereafter	$ 20
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years 9 months 18 days