LOANS - Defaults of Modified Corporate Loans (Details) - Corporate $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)
Financing Receivable, Modified [Line Items]
TDR balances	$ 203	$ 203
Total loans defaulted within one year of modification	0	0
Commercial and industrial
Financing Receivable, Modified [Line Items]
TDR balances	148	148
Total loans defaulted within one year of modification	0	0
Mortgage and real estate
Financing Receivable, Modified [Line Items]
TDR balances	16	16
Total loans defaulted within one year of modification	0	0
Other
Financing Receivable, Modified [Line Items]
TDR balances	39	39
Total loans defaulted within one year of modification	$ 0	$ 0