Reinsurance - Effects of Reinsurance (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 04, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Insurance [Abstract]
Direct Premiums Earned		$ 34	$ 32	$ 31
Assumed Premiums Earned		0	0	0
Ceded Premiums Earned		(2,459)	0	0
Total premiums, net		(2,425)	32	31
Policyholder Benefits and Claims Incurred, Direct		1,138	1,088	1,051
Policyholder Benefits and Claims Incurred, Assumed		8	7	6
Policyholder Benefits and Claims Incurred, Ceded	$ 2,500	2,629	46	44
Policyholder Interest and Other Benefits, Net		$ (1,483)	$ 1,049	$ 1,013