INVESTMENT OPERATIONS - Schedule of Available-for-Sale Credit Losses on Fixed Maturities With Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Beginning Balance			$ 23
Ending Balance	$ 2		2
Corporate securities
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Beginning Balance	1	$ 81	18	$ 0
Additions for securities for which an allowance was not previously recorded	0	0	0	62
Adjustments on previously recorded allowances due to change in expected cash flows	0	1	(1)	20
Reductions on previously recorded allowances due to disposal of security in the current period	0	0	0	0
Write-offs of previously recorded allowances due to intent or requirement to sell	0	(64)	(16)	(64)
Ending Balance	1	18	1	18
CMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Beginning Balance	1	0	4	0
Additions for securities for which an allowance was not previously recorded	0	0	0	0
Adjustments on previously recorded allowances due to change in expected cash flows	0	0	(3)	0
Reductions on previously recorded allowances due to disposal of security in the current period	0	0	0	0
Write-offs of previously recorded allowances due to intent or requirement to sell	0	0	0	0
Ending Balance	1	0	1	0
ABS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Beginning Balance	0	1	1	0
Additions for securities for which an allowance was not previously recorded	0	0	0	1
Adjustments on previously recorded allowances due to change in expected cash flows	0	0	0	0
Reductions on previously recorded allowances due to disposal of security in the current period	0	0	(1)	0
Write-offs of previously recorded allowances due to intent or requirement to sell	0	0	0	0
Ending Balance	0	1	0	1
Fixed maturities
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Beginning Balance	2	82	23	0
Additions for securities for which an allowance was not previously recorded	0	0	0	63
Adjustments on previously recorded allowances due to change in expected cash flows	0	1	(4)	20
Reductions on previously recorded allowances due to disposal of security in the current period	0	0	(1)	0
Write-offs of previously recorded allowances due to intent or requirement to sell	0	(64)	(16)	(64)
Ending Balance	$ 2	$ 19	$ 2	$ 19