SIGNIFICANT ACCOUNTING POLICIES - Assumption Updates (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Change in Accounting Estimate [Line Items]
Other income	$ 346	$ 72	$ 812	$ 260
Increase in remeasurement of liability for future policy benefits			(25)	(38)
Increase (decrease) in policyholders' benefit	418	523	1,371	1,728
Decrease in income (loss) from continuing operation, before income taxes	889	590	403	2,025
Decrease in net income (loss)	833	458	1,237	1,639
Long-term Lapses Partial Withdrawal Rates And Election Assumptions Updates
Change in Accounting Estimate [Line Items]
Other income	(51)		(51)
Increase in remeasurement of liability for future policy benefits	36	8	36	8
Increase (decrease) in policyholders' benefit	10	(2)	10	(2)
Increase (decrease) in market risk benefits and purchased market risk benefits	(50)	206	(50)	206
Increase in interest credited to policyholder account balances		1		1
Decrease in income (loss) from continuing operation, before income taxes	(47)	(213)	(47)	(213)
Decrease in net income (loss)	$ (37)	$ (168)	$ (37)	$ (168)