INVESTMENTS - Realized Investment Gains (Losses), Net (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended	9 Months Ended
	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Net Investment Income [Line Items]
Investment gains (losses), net	$ (455)	$ 481	$ 5,081	$ 481	$ (1,753)	$ 7,373
Equity securities
Net Investment Income [Line Items]
Investment gains (losses), net	(458)	(21)	141		(1,102)	1,197
Secured receivable
Net Investment Income [Line Items]
Investment gains (losses), net	(8)	0	0		(59)	0
Commercial mortgage and other loans
Net Investment Income [Line Items]
Investment gains (losses), net	0	0	28		0	28
Derivative instruments
Net Investment Income [Line Items]
Investment gains (losses), net	24	502	4,906		(560)	6,139
Other invested assets
Net Investment Income [Line Items]
Investment gains (losses), net	$ (13)	$ 0	$ 6		$ (32)	$ 9