REINUSRANCE - PREDECESSOR COMPANY - Schedule of Reinsurance Included in Statements of Financial Position (Details) - USD ($) $ in Millions		Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Other invested assets - Policy loans	[1]	$ 235		$ 8,108
Deferred policy acquisition costs			$ 469	567	$ 4,238	$ 4,456
Deferred sales inducements			244	295	715	813
Value of business acquired			$ (25)	(28)	$ (27)	$ (30)
Other assets		127		954
Reinsurance payables		0		7,183
Other liabilities		$ 808		1,192
Items Effected By Reinsurance
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Other invested assets - Policy loans				8,108
Deferred policy acquisition costs				530
Deferred sales inducements				26
Value of business acquired				(2)
Other assets				54
Reinsurance payables				7,183
Other liabilities				$ 824

[1] We have elected the fair value option on these financial statement line items for the Successor Company. See Note 2 for further discussion.