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LOANS AND LEASES - Modifications (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Financing Receivable, Modified [Line Items] |  |  |  |
Total | $ 287 | $ 408 | $ 644 | $ 669
% of total loan class | 0.21% | 0.34% | 0.47% | 0.55%
Amortized cost basis | $ 751 | $ 772 | $ 751 | $ 772
30-59 Days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 37 | 23 | 37 | 23
60-89 Days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 15 | 7 | 15 | 7
90 or more days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 29 | 24 | 29 | 24
Total |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 81 | 54 | 81 | 54
Current |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 670 | 718 | 670 | 718
Commercial | Commercial and industrial |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | $ 130 | $ 204 | $ 354 | $ 345
% of total loan class | 0.21% | 0.38% | 0.56% | 0.64%
Amortized cost basis | $ 435 | $ 425 | $ 435 | $ 425
Commercial | Commercial and industrial | 30-59 Days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 21 | 1 | 21 | 1
Commercial | Commercial and industrial | 60-89 Days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 8 | 2 | 8 | 2
Commercial | Commercial and industrial | 90 or more days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 9 | 4 | 9 | 4
Commercial | Commercial and industrial | Total |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 38 | 7 | 38 | 7
Commercial | Commercial and industrial | Current |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 397 | 418 | 397 | 418
Commercial | Commercial real estate |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | $ 125 | $ 179 | $ 213 | $ 253
% of total loan class | 1.16% | 1.55% | 1.98% | 2.19%
Amortized cost basis | $ 220 | $ 259 | $ 220 | $ 259
Commercial | Commercial real estate | 30-59 Days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 0 | 9 | 0 | 9
Commercial | Commercial real estate | 60-89 Days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 0 | 0 | 0 | 0
Commercial | Commercial real estate | 90 or more days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 1 | 5 | 1 | 5
Commercial | Commercial real estate | Total |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 1 | 14 | 1 | 14
Commercial | Commercial real estate | Current |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 219 | 245 | 219 | 245
Consumer | Residential mortgage |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | $ 22 | $ 17 | $ 56 | $ 45
% of total loan class | 0.09% | 0.07% | 0.23% | 0.19%
Amortized cost basis | $ 70 | $ 54 | $ 70 | $ 54
Consumer | Residential mortgage | 30-59 Days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 13 | 10 | 13 | 10
Consumer | Residential mortgage | 60-89 Days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 6 | 4 | 6 | 4
Consumer | Residential mortgage | 90 or more days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 18 | 11 | 18 | 11
Consumer | Residential mortgage | Total |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 37 | 25 | 37 | 25
Consumer | Residential mortgage | Current |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 33 | 29 | 33 | 29
Consumer | Automobile |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | $ 4 | $ 3 | $ 6 | $ 11
% of total loan class | 0.03% | 0.02% | 0.04% | 0.08%
Amortized cost basis | $ 8 | $ 15 | $ 8 | $ 15
Consumer | Automobile | 30-59 Days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 1 | 2 | 1 | 2
Consumer | Automobile | 60-89 Days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 0 | 1 | 0 | 1
Consumer | Automobile | 90 or more days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 0 | 0 | 0 | 0
Consumer | Automobile | Total |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 1 | 3 | 1 | 3
Consumer | Automobile | Current |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 7 | 12 | 7 | 12
Consumer | Home equity |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | $ 5 | $ 4 | $ 13 | $ 13
% of total loan class | 0.05% | 0.04% | 0.13% | 0.13%
Amortized cost basis | $ 16 | $ 16 | $ 16 | $ 16
Consumer | Home equity | 30-59 Days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 2 | 1 | 2 | 1
Consumer | Home equity | 60-89 Days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 1 | 0 | 1 | 0
Consumer | Home equity | 90 or more days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 1 | 4 | 1 | 4
Consumer | Home equity | Total |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 4 | 5 | 4 | 5
Consumer | Home equity | Current |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 12 | 11 | 12 | 11
Consumer | RV and marine |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | $ 1 |  | $ 1 | $ 1
% of total loan class | 0.02% |  | 0.02% | 0.02%
Amortized cost basis | $ 1 | 1 | $ 1 | $ 1
Consumer | RV and marine | 30-59 Days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 0 | 0 | 0 | 0
Consumer | RV and marine | 60-89 Days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 0 | 0 | 0 | 0
Consumer | RV and marine | 90 or more days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 0 | 0 | 0 | 0
Consumer | RV and marine | Total |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 0 | 0 | 0 | 0
Consumer | RV and marine | Current |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 1 | 1 | 1 | 1
Consumer | Other consumer |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total |  | $ 1 | $ 1 | $ 1
% of total loan class |  | 0.06% | 0.05% | 0.06%
Amortized cost basis | 1 | $ 2 | $ 1 | $ 2
Consumer | Other consumer | 30-59 Days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 0 | 0 | 0 | 0
Consumer | Other consumer | 60-89 Days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 0 | 0 | 0 | 0
Consumer | Other consumer | 90 or more days |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 0 | 0 | 0 | 0
Consumer | Other consumer | Total |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 0 | 0 | 0 | 0
Consumer | Other consumer | Current |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Amortized cost basis | 1 | 2 | 1 | 2
Interest rate reduction |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 24 | 23 | 92 | 43
Interest rate reduction | Commercial | Commercial and industrial |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | $ 24 | $ 22 | $ 91 | $ 42
Interest rate reduction | Commercial | Commercial and industrial | Minimum |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Weighted-average contractual interest rate | 9.93% | 7.81% | 8.67% | 8.80%
Interest rate reduction | Commercial | Commercial and industrial | Maximum |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Weighted-average contractual interest rate | 8.16% | 6.56% | 7.32% | 7.60%
Interest rate reduction | Commercial | Commercial real estate |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | $ 0 | $ 0 | $ 0 | $ 0
Interest rate reduction | Consumer | Commercial real estate | Minimum |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Weighted-average contractual interest rate |  |  |  | 8.26%
Interest rate reduction | Consumer | Commercial real estate | Maximum |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Weighted-average contractual interest rate |  |  |  | 7.90%
Interest rate reduction | Consumer | Residential mortgage |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 0 | 0 | $ 0 | $ 0
Interest rate reduction | Consumer | Residential mortgage | Minimum |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Weighted-average contractual interest rate |  |  |  |
Interest rate reduction | Consumer | Residential mortgage | Maximum |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Weighted-average contractual interest rate |  |  |  |
Interest rate reduction | Consumer | Automobile |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 0 | 0 | $ 0 | 0
Interest rate reduction | Consumer | Home equity |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 0 | 0 | 0 | 0
Interest rate reduction | Consumer | RV and marine |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 0 |  | 0 | 0
Interest rate reduction | Consumer | Other consumer |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total |  | 1 | 1 | 1
Term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 255 | 352 | 525 | 520
Term extension | Commercial | Commercial and industrial |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | $ 105 | $ 165 | $ 261 | $ 240
Weighted-average years added to the life | 8 months 12 days | 8 months 12 days | 1 year 1 month 6 days | 9 months 18 days
Term extension | Commercial | Commercial real estate |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | $ 125 | $ 168 | $ 213 | $ 228
Weighted-average years added to the life | 3 months 18 days | 1 year | 9 months 18 days | 1 year
Term extension | Consumer | Residential mortgage |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | $ 18 | $ 15 | $ 38 | $ 37
Weighted-average years added to the life | 6 years 1 month 6 days | 5 years 9 months 18 days | 6 years 2 months 12 days | 6 years 10 months 24 days
Term extension | Consumer | Automobile |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | $ 4 | $ 3 | $ 6 | $ 10
Term extension | Consumer | Home equity |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 2 | 1 | 6 | 4
Term extension | Consumer | RV and marine |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 1 |  | 1 | 1
Term extension | Consumer | Other consumer |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total |  | 0 | 0 | 0
Payment deferral |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 3 | 1 | 14 | 5
Payment deferral | Commercial | Commercial and industrial |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 0 | 0 | 0 | 0
Payment deferral | Commercial | Commercial real estate |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 0 | 0 | 0 | 0
Payment deferral | Consumer | Residential mortgage |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 3 | 1 | 14 | 5
Payment deferral | Consumer | Automobile |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 0 | 0 | 0 | 0
Payment deferral | Consumer | Home equity |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 0 | 0 | 0 | 0
Payment deferral | Consumer | RV and marine |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 0 |  | 0 | 0
Payment deferral | Consumer | Other consumer |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total |  | 0 | 0 | 0
Combo - interest rate reduction and term extension |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 5 | 32 | 13 | 101
Combo - interest rate reduction and term extension | Commercial | Commercial and industrial |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 1 | 17 | 2 | 63
Combo - interest rate reduction and term extension | Commercial | Commercial real estate |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 0 | 11 | 0 | 25
Combo - interest rate reduction and term extension | Consumer | Residential mortgage |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 1 | 1 | 4 | 3
Combo - interest rate reduction and term extension | Consumer | Automobile |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 0 | 0 | 0 | 1
Combo - interest rate reduction and term extension | Consumer | Home equity |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | 3 | 3 | 7 | 9
Combo - interest rate reduction and term extension | Consumer | RV and marine |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total | $ 0 |  | 0 | 0
Combo - interest rate reduction and term extension | Consumer | Other consumer |  |  |  |
Financing Receivable, Modified [Line Items] |  |  |  |
Total |  | $ 0 | $ 0 | $ 0

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