INVESTMENTS - Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Allowance for Loan Losses by Portfolio Segment [Roll Forward]
Balance, beginning of period			$ (174)
(Addition to) release of allowance for credit losses	$ (12)	$ (29)	(8)	$ 15
Balance, end of period	(182)		(182)
Balance, beginning of period			(8)
(Addition to) release of allowance for credit losses	0	0	0	1
Balance, end of period	(6)		(6)
Balance, beginning of period			0
(Addition to) release of allowance for credit losses	0	27	0	38
Balance, end of period	0		0
Transitional real estate loans
Allowance for Loan Losses by Portfolio Segment [Roll Forward]
Balance, beginning of period	(53)	(41)	(68)	(63)
(Addition to) release of allowance for credit losses	(2)	(18)	13	4
Write-offs, net of recoveries	0	0	0	0
Change in foreign exchange	0		0
Balance, end of period	(55)	(59)	(55)	(59)
Commercial mortgage loans
Allowance for Loan Losses by Portfolio Segment [Roll Forward]
Balance, beginning of period	(8)	(22)	(10)	(32)
(Addition to) release of allowance for credit losses	(2)	5	0	15
Write-offs, net of recoveries	0	0	0	0
Change in foreign exchange	0		0
Balance, end of period	(10)	(17)	(10)	(17)
Middle market loans
Allowance for Loan Losses by Portfolio Segment [Roll Forward]
Balance, beginning of period	(109)	(76)	(96)	(85)
(Addition to) release of allowance for credit losses	(6)	(13)	(24)	(4)
Write-offs, net of recoveries	(2)	0	3	0
Change in foreign exchange	0		0
Balance, end of period	(117)	(89)	(117)	(89)
Held-to-maturity securities
Allowance for Loan Losses by Portfolio Segment [Roll Forward]
Balance, beginning of period	(7)	(8)	(8)	(10)
(Addition to) release of allowance for credit losses	0	(1)	0	1
Write-offs, net of recoveries	0	0	0	0
Change in foreign exchange	1		2
Balance, end of period	(6)	(9)	(6)	(9)
Available-for-sale securities
Allowance for Loan Losses by Portfolio Segment [Roll Forward]
Balance, beginning of period	0	(26)	0	(38)
(Addition to) release of allowance for credit losses	0	0	0	26
Write-offs, net of recoveries	0	26	0	12
Change in foreign exchange	0		0
Balance, end of period	0	0	0	0
Reinsurance recoverables
Allowance for Loan Losses by Portfolio Segment [Roll Forward]
Balance, beginning of period	(8)	(13)	(13)	(12)
(Addition to) release of allowance for credit losses)	0	0	2	(1)
Write-offs, net of recoveries	0	0	0	0
Change in foreign exchange	0		3
Balance, end of period	$ (8)	$ (13)	$ (8)	$ (13)