FAIR VALUE MEASUREMENT - Level 3 Roll Forward Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Equity contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers out of Level 3, assets		$ 1,900
Loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers out of Level 3, assets		2,100
Long-term debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers out of Level 3, assets	$ 7,600	9,800
Transfers into Level 3	9,900	8,600
Transfers into Level 3, liabilities	9,873	8,611
Transfers out of Level 3, liabilities	7,612	9,771
Long-term debt | Measurement Input, Option Volatility
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers into Level 3, liabilities	7,000	7,200
Long-term debt | Equity volatility
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers into Level 3, liabilities	2,900	1,000
Trading account assets and liabilities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers out of Level 3, assets	726	(2,175)
Transfers into Level 3	(774)	(978)
Trading account assets and liabilities | Equity contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers out of Level 3, assets	(673)	(1,923)
Transfers into Level 3	(572)	(1,101)
Transfers into Level 3, liabilities		1,100
Trading account assets and liabilities | Interest rate hedges
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers out of Level 3, assets	792	(562)
Transfers into Level 3	$ 33	$ 102