Annual report pursuant to Section 13 and 15(d)

LOANS AND LEASES - Nonaccrual Loans by Loan Class (Details)

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LOANS AND LEASES - Nonaccrual Loans by Loan Class (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Nonaccrual loans and leases with no ACL $ 133 $ 112
Total nonaccrual loans and leases 667 569
Commercial portfolio | Commercial and industrial    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Nonaccrual loans and leases with no ACL 66 49
Total nonaccrual loans and leases 344 288
Commercial portfolio | Commercial real estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Nonaccrual loans and leases with no ACL 64 63
Total nonaccrual loans and leases 140 92
Commercial portfolio | Lease financing    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Nonaccrual loans and leases with no ACL 3 0
Total nonaccrual loans and leases 14 18
Consumer | Residential mortgage    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Nonaccrual loans and leases with no ACL 0 0
Total nonaccrual loans and leases 72 90
Consumer | Automobile    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Nonaccrual loans and leases with no ACL 0 0
Total nonaccrual loans and leases 4 4
Consumer | Home equity    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Nonaccrual loans and leases with no ACL 0 0
Total nonaccrual loans and leases 91 76
Consumer | RV and marine    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Nonaccrual loans and leases with no ACL 0 0
Total nonaccrual loans and leases $ 2 $ 1