DERIVATIVE INSTRUMENTS - Offsetting of Financial Liabilities and Derivative Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Offsetting Liabilities [Line Items]
Gross amount of recognized derivative liabilities	$ 1,308	$ 1,205
Gross amount of assets offset in balance sheet	0	0
Derivative liability, fair value, amount not offset against collateral	1,308	1,205
Financial instruments, amounts not offset	(174)	(471)
Derivative, collateral, right to reclaim securities	(506)	(662)
Derivative, collateral, right to reclaim cash	(629)	(49)
Derivative liability, fair value, amount offset against collateral, subject to master netting agreement	(1)	23
Derivative liability, not subject to master netting arrangement	390
Derivative liability, fair value, gross liability including not subject to master netting arrangement	1,698	1,619
Net amount of derivative liabilities presented in balance sheet	$ 1,698	$ 1,619
Net amount of derivative liabilities presented in balance sheet ext list	Other Liabilities	Other Liabilities
Derivative liability, fair value, amount offset against collateral	$ 389	$ 437
Securities lending, gross amounts of recognized financial instruments, offsetting liabilities	1,809	2,162
Securities lending, gross amounts offset in statement of financial position, offsetting liabilities	0	0
Securities lending, net amounts of financial instruments presented in balance sheet, offsetting liabilities	1,809	2,162
Securities lending, carrying value of financial instruments, liabilities not offset in balance sheet	(1,788)	(2,124)
Securities lending, securities collateral, liabilities not offset in balance sheet	0	0
Securities lending, cash collateral, liabilities not offset in balance sheet	0	0
Securities lending, financial instruments, amount of liabilities offset against collateral	21	38
Gross amounts of recognized financial instruments, offsetting liabilities	3,507	3,781
Gross amounts offset in statement of financial position, offsetting liabilities	0	0
Net amounts of financial instruments presented in balance sheet, offsetting liabilities	3,507	3,781
Carrying value of financial instruments, liabilities not offset in balance sheet	(1,962)	(2,595)
Securities collateral, liabilities not offset in balance sheet	(506)	(662)
Cash collateral, liabilities not offset in balance sheet	(629)	(49)
Financial instruments, amount of liabilities offset against collateral	410	475
Over the Counter - Bilateral
Offsetting Liabilities [Line Items]
Gross amount of recognized derivative liabilities	725	1,151
Gross amount of assets offset in balance sheet	0	0
Derivative liability, fair value, amount not offset against collateral	725	1,151
Financial instruments, amounts not offset	(167)	(471)
Derivative, collateral, right to reclaim securities	(506)	(662)
Derivative, collateral, right to reclaim cash	(52)	(14)
Derivative liability, fair value, amount offset against collateral, subject to master netting agreement	0	4
Derivative liability, not subject to master netting arrangement	390	414
Over the Counter - Cleared
Offsetting Liabilities [Line Items]
Gross amount of recognized derivative liabilities	583	54
Gross amount of assets offset in balance sheet	0	0
Derivative liability, fair value, amount not offset against collateral	583	54
Financial instruments, amounts not offset	(7)	0
Derivative, collateral, right to reclaim securities	0	0
Derivative, collateral, right to reclaim cash	(577)	(35)
Derivative liability, fair value, amount offset against collateral, subject to master netting agreement	$ (1)	$ 19