FAIR VALUE MEASUREMENT - Level 3 Fair Value Rollforward Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Loans
Fair value, assets and liabilities measured on recurring basis, level 3 fair-value category disclosures
Transfers out of Level 3				$ 2,000
Equity contracts
Fair value, assets and liabilities measured on recurring basis, level 3 fair-value category disclosures
Transfers out of Level 3				1,600
Transfers into Level 3				1,000
Long-term debt
Fair value, assets and liabilities measured on recurring basis, level 3 fair-value category disclosures
Transfers into Level 3, liabilities	$ 2,831	$ 2,052	$ 9,574	6,921
Transfers out of Level 3	$ (800)	$ (1,100)	(4,300)	(7,100)
Long-term debt | Option Volatility
Fair value, assets and liabilities measured on recurring basis, level 3 fair-value category disclosures
Transfers into Level 3, liabilities			6,800	5,900
Long-term debt | Equity Volatility
Fair value, assets and liabilities measured on recurring basis, level 3 fair-value category disclosures
Transfers into Level 3, liabilities			$ 2,800	$ 900