Quarterly report pursuant to Section 13 or 15(d)

LOANS AND LEASES - Modifications (Details)

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LOANS AND LEASES - Modifications (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Financing Receivable, Modified [Line Items]    
Total $ 302 $ 241
% of total loan class 0.25% 0.21%
Amortized cost basis $ 684 $ 241
30-59 Days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 15 4
60-89  Days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 24 4
90 or  more days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 21 0
Total    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 60 8
Current    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 624 233
Commercial | Commercial and industrial    
Financing Receivable, Modified [Line Items]    
Total $ 248 $ 162
% of total loan class 0.48% 0.32%
Amortized cost basis $ 473 $ 162
Commercial | Commercial and industrial | 30-59 Days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 2 0
Commercial | Commercial and industrial | 60-89  Days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 11 0
Commercial | Commercial and industrial | 90 or  more days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 11 0
Commercial | Commercial and industrial | Total    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 24 0
Commercial | Commercial and industrial | Current    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 449 162
Commercial | Commercial real estate    
Financing Receivable, Modified [Line Items]    
Total $ 31 $ 48
% of total loan class 0.25% 0.36%
Amortized cost basis $ 127 $ 48
Commercial | Commercial real estate | 30-59 Days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 2 0
Commercial | Commercial real estate | 60-89  Days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 7 0
Commercial | Commercial real estate | 90 or  more days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 0 0
Commercial | Commercial real estate | Total    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 9 0
Commercial | Commercial real estate | Current    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 118 48
Consumer | Residential mortgage    
Financing Receivable, Modified [Line Items]    
Total $ 14 $ 24
% of total loan class 0.06% 0.11%
Amortized cost basis $ 53 $ 24
Consumer | Residential mortgage | 30-59 Days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 8 4
Consumer | Residential mortgage | 60-89  Days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 5 4
Consumer | Residential mortgage | 90 or  more days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 9 0
Consumer | Residential mortgage | Total    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 22 8
Consumer | Residential mortgage | Current    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 31 16
Consumer | Automobile    
Financing Receivable, Modified [Line Items]    
Total $ 4 $ 3
% of total loan class 0.03% 0.02%
Amortized cost basis $ 16 $ 3
Consumer | Automobile | 30-59 Days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 2 0
Consumer | Automobile | 60-89  Days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 0 0
Consumer | Automobile | 90 or  more days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 0 0
Consumer | Automobile | Total    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 2 0
Consumer | Automobile | Current    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 14 3
Consumer | Home equity    
Financing Receivable, Modified [Line Items]    
Total $ 5 $ 3
% of total loan class 0.05% 0.03%
Amortized cost basis $ 14 $ 3
Consumer | Home equity | 30-59 Days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 1 0
Consumer | Home equity | 60-89  Days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 1 0
Consumer | Home equity | 90 or  more days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 1 0
Consumer | Home equity | Total    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 3 0
Consumer | Home equity | Current    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 11 3
Consumer | RV and marine    
Financing Receivable, Modified [Line Items]    
Total   $ 1
% of total loan class   0.02%
Amortized cost basis 1 $ 1
Consumer | RV and marine | 30-59 Days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 0 0
Consumer | RV and marine | 60-89  Days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 0 0
Consumer | RV and marine | 90 or  more days    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 0 0
Consumer | RV and marine | Total    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 0 0
Consumer | RV and marine | Current    
Financing Receivable, Modified [Line Items]    
Amortized cost basis 1 1
Interest rate reduction    
Financing Receivable, Modified [Line Items]    
Total 87 35
Interest rate reduction | Commercial | Commercial and industrial    
Financing Receivable, Modified [Line Items]    
Total $ 87 $ 35
Interest rate reduction | Commercial | Commercial and industrial | Minimum    
Financing Receivable, Modified [Line Items]    
Weighted-average contractual interest rate 8.24% 7.60%
Interest rate reduction | Commercial | Commercial and industrial | Maximum    
Financing Receivable, Modified [Line Items]    
Weighted-average contractual interest rate 7.28% 6.80%
Interest rate reduction | Commercial | Commercial real estate    
Financing Receivable, Modified [Line Items]    
Total $ 0 $ 0
Interest rate reduction | Consumer | Residential mortgage    
Financing Receivable, Modified [Line Items]    
Total $ 0 $ 0
Interest rate reduction | Consumer | Residential mortgage | Minimum    
Financing Receivable, Modified [Line Items]    
Weighted-average contractual interest rate 7.25% 5.36%
Interest rate reduction | Consumer | Residential mortgage | Maximum    
Financing Receivable, Modified [Line Items]    
Weighted-average contractual interest rate 5.20% 4.14%
Interest rate reduction | Consumer | Automobile    
Financing Receivable, Modified [Line Items]    
Total $ 0 $ 0
Interest rate reduction | Consumer | Home equity    
Financing Receivable, Modified [Line Items]    
Total 0 0
Interest rate reduction | Consumer | RV and marine    
Financing Receivable, Modified [Line Items]    
Total   0
Term extension    
Financing Receivable, Modified [Line Items]    
Total 200 199
Term extension | Commercial | Commercial and industrial    
Financing Receivable, Modified [Line Items]    
Total $ 154 $ 124
Weighted-average years added to the life 4 months 24 days 10 months 24 days
Term extension | Commercial | Commercial real estate    
Financing Receivable, Modified [Line Items]    
Total $ 31 $ 48
Weighted-average years added to the life 7 months 6 days 7 months 6 days
Term extension | Consumer | Residential mortgage    
Financing Receivable, Modified [Line Items]    
Total $ 10 $ 23
Weighted-average years added to the life 8 years 7 months 6 days 6 years 3 months 18 days
Term extension | Consumer | Automobile    
Financing Receivable, Modified [Line Items]    
Total $ 4 $ 3
Term extension | Consumer | Home equity    
Financing Receivable, Modified [Line Items]    
Total 1 0
Term extension | Consumer | RV and marine    
Financing Receivable, Modified [Line Items]    
Total   1
Payment deferral    
Financing Receivable, Modified [Line Items]    
Total 3 0
Payment deferral | Commercial | Commercial and industrial    
Financing Receivable, Modified [Line Items]    
Total 0 0
Payment deferral | Commercial | Commercial real estate    
Financing Receivable, Modified [Line Items]    
Total 0 0
Payment deferral | Consumer | Residential mortgage    
Financing Receivable, Modified [Line Items]    
Total 3 0
Payment deferral | Consumer | Automobile    
Financing Receivable, Modified [Line Items]    
Total 0 0
Payment deferral | Consumer | Home equity    
Financing Receivable, Modified [Line Items]    
Total 0 0
Payment deferral | Consumer | RV and marine    
Financing Receivable, Modified [Line Items]    
Total   0
Combo - interest rate reduction and term extension    
Financing Receivable, Modified [Line Items]    
Total 12 7
Combo - interest rate reduction and term extension | Commercial | Commercial and industrial    
Financing Receivable, Modified [Line Items]    
Total 7 3
Combo - interest rate reduction and term extension | Commercial | Commercial real estate    
Financing Receivable, Modified [Line Items]    
Total 0 0
Combo - interest rate reduction and term extension | Consumer | Residential mortgage    
Financing Receivable, Modified [Line Items]    
Total 1 1
Combo - interest rate reduction and term extension | Consumer | Automobile    
Financing Receivable, Modified [Line Items]    
Total 0 0
Combo - interest rate reduction and term extension | Consumer | Home equity    
Financing Receivable, Modified [Line Items]    
Total $ 4 3
Combo - interest rate reduction and term extension | Consumer | RV and marine    
Financing Receivable, Modified [Line Items]    
Total   $ 0