SIGNIFICANT ACCOUNTING POLICIES - Assumption Updates and Model Changes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Change in Accounting Estimate [Line Items]
Policy charges and fee income	$ 3,391	$ 3,464	$ 3,487
Policyholders’ benefits	2,982	4,951	4,088
Interest credited to policyholders’ account balances	1,128	1,118	1,149
Net derivative gains (losses)	(4,685)	(1,541)	(3,831)
Amortization of deferred policy acquisition costs, net	456	1,333	520
Income (loss) from continuing operations, before income taxes	(1,870)	(1,386)	(2,463)
Net income (loss)	(1,396)	(759)	(1,884)
Long-term Lapses Partial Withdrawal Rates And Election Assumptions Updates
Change in Accounting Estimate [Line Items]
Policy charges and fee income	(32)	33	(11)
Policyholders’ benefits	(100)	1,500	886
Interest credited to policyholders’ account balances		2	(14)
Net derivative gains (losses)	(249)	106	(548)
Amortization of deferred policy acquisition costs, net	(19)	866	(77)
Income (loss) from continuing operations, before income taxes	(162)	(2,200)	(1,400)
Net income (loss)	$ (128)	(1,800)	$ (1,100)
Economic Scenario Generator
Change in Accounting Estimate [Line Items]
Income (loss) from continuing operations, before income taxes		165
Net income (loss)		$ 130
5-year Historical Average Over A 10-year Period
Change in Accounting Estimate [Line Items]
Interest rate assumptions	2.25%