INVESTMENTS - Allowance for Credit Losses by Portfolio Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023		Dec. 31, 2022
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Balance, beginning of period	$ (274)
Balance, end of period	(355)	$ (274)
Balance, beginning of period	(5)	(7)		$ (8)
(Addition to) release of allowance for credit losses	0	1	[1]	0
Writeoffs, net of recoveries	0	0		0
Change in foreign exchange	0	1		1
Balance, end of period	(5)	(5)		(7)
Balance, beginning of period	0	0		0
(Addition to) release of allowance for credit losses	0	0	[1]	0
Writeoffs, net of recoveries	0	0		0
Change in foreign exchange	0	0		0
Balance, end of period	0	0		0
Balance, beginning of period	(295)	(223)		(213)
(Addition to) release of allowance for credit losses	(210)	(139)	[1]	(17)
Writeoffs, net of recoveries	130	66		6
Change in foreign exchange	0	1		1
Balance, end of period	(375)	(295)		(223)
Allowance for credit loss accounted for as purchased financial assets with credit deterioration		4
Transitional real estate loans
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Balance, beginning of period	(112)	(54)		(68)
(Addition to) release of allowance for credit losses	(148)	(124)	[1]	14
Writeoffs, net of recoveries	61	66		0
Change in foreign exchange	0	0		0
Balance, end of period	(199)	(112)		(54)
Commercial mortgage loans
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Balance, beginning of period	(16)	(9)		(10)
(Addition to) release of allowance for credit losses	(17)	(7)	[1]	1
Writeoffs, net of recoveries	19	0		0
Change in foreign exchange	0	0		0
Balance, end of period	(14)	(16)		(9)
Middle market loans
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Balance, beginning of period	(146)	(129)		(96)
(Addition to) release of allowance for credit losses	(44)	(17)	[1]	(39)
Writeoffs, net of recoveries	50	0		6
Change in foreign exchange	0	0		0
Balance, end of period	(140)	(146)		(129)
Other loans and loan commitments
Allowance for Credit Losses by Portfolio Segment [Roll Forward]
Balance, beginning of period	(16)	(24)		(31)
(Addition to) release of allowance for credit losses	(1)	8	[1]	7
Writeoffs, net of recoveries	0	0		0
Change in foreign exchange	0	0		0
Balance, end of period	$ (17)	$ (16)		$ (24)

[1] Includes an allowance for credit losses of $4 recognized on financial assets accounted for as purchased financial assets with credit deterioration that is not recorded in earnings upon recognition.