Annual report pursuant to Section 13 and 15(d)

LOANS AND LEASES - Gross Charge-offs of Loans and Leases (Details)

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LOANS AND LEASES - Gross Charge-offs of Loans and Leases (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one $ 38 $ 34  
Year two 79 101  
Year three 142 115  
Year four 71 30  
Year five 26 73  
Prior 79 44  
Revolver Gross Charge-offs 52 20  
Revolver Converted to Term Loans Gross Charge-offs 44 37  
Total 531 454 $ 313
Commercial portfolio      
Financing Receivable, Credit Quality Indicator [Line Items]      
Total 311 270 129
Consumer portfolio      
Financing Receivable, Credit Quality Indicator [Line Items]      
Total 220 184 $ 184
Commercial and industrial | Commercial portfolio      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 4 9  
Year two 26 47  
Year three 74 48  
Year four 38 14  
Year five 14 33  
Prior 19 13  
Revolver Gross Charge-offs 47 11  
Revolver Converted to Term Loans Gross Charge-offs 3 2  
Total 225 177  
Commercial real estate | Commercial portfolio      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 12 8  
Year two 4 9  
Year three 31 31  
Year four 3 0  
Year five 0 26  
Prior 25 4  
Revolver Gross Charge-offs 4 7  
Revolver Converted to Term Loans Gross Charge-offs 0 0  
Total 79 85  
Lease financing | Commercial portfolio      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 2 0  
Year two 2 4  
Year three 0 2  
Year four 2 1  
Year five 0 1  
Prior 1 0  
Revolver Gross Charge-offs 0 0  
Revolver Converted to Term Loans Gross Charge-offs 0 0  
Total 7 8  
Residential mortgage | Consumer portfolio      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 0 0  
Year two 0 0  
Year three 0 1  
Year four 0 0  
Year five 0 0  
Prior 3 4  
Revolver Gross Charge-offs 0 0  
Revolver Converted to Term Loans Gross Charge-offs 0 0  
Total 3 5  
Automobile | Consumer portfolio      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 5 3  
Year two 18 16  
Year three 17 16  
Year four 14 7  
Year five 5 5  
Prior 4 3  
Revolver Gross Charge-offs 0 0  
Revolver Converted to Term Loans Gross Charge-offs 0 0  
Total 63 50  
Home equity | Consumer portfolio      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 0 0  
Year two 0 0  
Year three 0 0  
Year four 0 0  
Year five 0 0  
Prior 1 1  
Revolver Gross Charge-offs 1 2  
Revolver Converted to Term Loans Gross Charge-offs 4 6  
Total 6 9  
RV and marine | Consumer portfolio      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 1 0  
Year two 4 2  
Year three 5 4  
Year four 7 3  
Year five 4 3  
Prior 10 7  
Revolver Gross Charge-offs 0 0  
Revolver Converted to Term Loans Gross Charge-offs 0 0  
Total 31 19  
Other consumer | Consumer portfolio      
Financing Receivable, Credit Quality Indicator [Line Items]      
Year one 14 14  
Year two 25 23  
Year three 15 13  
Year four 7 5  
Year five 3 5  
Prior 16 12  
Revolver Gross Charge-offs 0 0  
Revolver Converted to Term Loans Gross Charge-offs 37 29  
Total $ 117 $ 101