MARKET RISK BENEFITS - Reconciles Market Risk Benefits (Details) - USD ($) $ in Millions	Dec. 31, 2023	Apr. 01, 2023	Dec. 31, 2022
Market Risk Benefit [Line Items]
MRB Asset	$ (24)	$ (8,200)	$ (11)
MRB Liability	7,333		16
Individual Retirement
Market Risk Benefit [Line Items]
MRB Asset	(24)		(11)
MRB Liability	7,333		16
Net MRB	7,309		5
Purchased MRB	(9)		(13)
Net amount at risk	7,300		(8)
GMxB Core | Individual Retirement
Market Risk Benefit [Line Items]
MRB Asset	(14)		(11)
MRB Liability	1,205		5
Net MRB	1,191		(6)
Purchased MRB	0		0
Net amount at risk	1,191		(6)
GMxB Legacy | Individual Retirement
Market Risk Benefit [Line Items]
MRB Asset	0		0
MRB Liability	6,082		0
Net MRB	6,082		0
Purchased MRB	0		0
Net amount at risk	6,082		0
Others | Individual Retirement
Market Risk Benefit [Line Items]
MRB Asset	(10)		0
MRB Liability	46		11
Net MRB	36		11
Purchased MRB	(9)		(13)
Net amount at risk	$ 27		$ (2)