BASIS OF PRESENTATION, UPDATED ACCOUNTING POLICIES AND ACCOUNTING CHANGES - Accounting Changes (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended	9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease in interest expense	$ (3,270)		$ (730)			$ (5,561)	$ (2,118)
Increase in other operating expenses	$ 2,895		$ 2,760			$ 9,190	$ 8,170
Revision of Prior Period, Reclassification, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease in interest expense				$ 293
Increase in other operating expenses					$ 912
Macroeconomic Uncertainty
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) in allowance for credit losses		$ 800
Change in Accounting Method Accounted for as Change in Estimate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase (decrease) in allowance for credit losses		$ (300)