SIGNIFICANT ACCOUNTING POLICIES - Assumption Updates (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Change in Accounting Estimate [Line Items]
Policy charges and fee income	$ 727	$ 811	$ 2,229	$ 2,581
Policyholders’ benefits	510	708	2,260	2,383
Interest credited to policyholders’ account balances	351	285	930	841
Net derivative gains (losses)	26	(236)	2,921	(4,152)
Income (loss) from continuing operations, before income taxes	133	497	2,582	(1,883)
Net income (loss)	88	398	2,084	(1,383)
Long-term Lapses Partial Withdrawal Rates And Election Assumptions Updates
Change in Accounting Estimate [Line Items]
Policy charges and fee income	(17)	(32)	(17)	(32)
Policyholders’ benefits	235	100	235	100
Interest credited to policyholders’ account balances	(1)		(1)
Net derivative gains (losses)	(85)	(249)	(85)	(249)
Decrease in amortization of DAC	7	19	7	19
Income (loss) from continuing operations, before income taxes	139	(162)	139	(162)
Net income (loss)	$ 110	$ (128)	$ 110	$ (128)