LOANS - Defaults of Modified Corporate Loans (Details) - Corporate loans $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2022 USD ($)
Financing Receivable, Modified [Line Items]
TDR balances	$ 150	$ 150
Total loans defaulted within one year of modification	0	0
Commercial and industrial
Financing Receivable, Modified [Line Items]
TDR balances	114	114
Total loans defaulted within one year of modification	0	0
Mortgage and real estate
Financing Receivable, Modified [Line Items]
TDR balances	14	14
Total loans defaulted within one year of modification	0	0
Other
Financing Receivable, Modified [Line Items]
TDR balances	22	22
Total loans defaulted within one year of modification	$ 0	$ 0