Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Intangible assets	$ 377		$ 377		$ 409
Amortization of intangible assets	14	$ 14	33	$ 27
2019	20		20
2020	37		37
2021	34		34
2022	31		31
2023	28		28
Thereafter	228		228
Insurance Intangible Asset [Member]
Intangible Assets, Gross (Excluding Goodwill)	1,283		1,283		1,281
Finite-Lived Intangible Assets, Accumulated Amortization	940		940		908
Intangible assets	343		343		373
Amortization of intangible assets	13	14	31	27
2019	19		19
2020	34		34
2021	31		31
2022	28		28
2023	26		26
Thereafter	205		$ 205
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			7 years 4 months 24 days
Other Intangible Assets
Intangible Assets, Gross (Excluding Goodwill)	36		$ 36		36
Finite-Lived Intangible Assets, Accumulated Amortization	1		1		0
Intangible assets	34		34		$ 36
Amortization of intangible assets	1	$ 0	1	$ 0
2019	1		1
2020	3		3
2021	3		3
2022	3		3
2023	3		3
Thereafter	$ 22		$ 22
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years 8 months 12 days