Quarterly report pursuant to Section 13 or 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
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, term loans gross charge-offs, current fiscal year $ 1 $ 2
Financing receivable, term loans gross charge-offs, year before current fiscal year 18 25
Financing receivable, term loans gross charge-offs, two years before current fiscal year 31 33
Financing receivable, term loans gross charge-offs, three years before current fiscal year 25 10
Financing receivable, term loans gross charge-offs, four years before current fiscal year 15 7
Financing receivable, term loans gross charge-offs, five years before current fiscal year 16 9
Financing receivable, revolver gross charge-offs 10 5
Financing receivable, revolver converted to term loans gross charge-offs 12 8
Financing receivable, term loans gross charge-offs 128 99
Commercial    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, term loans gross charge-offs 74 52
Consumer    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, term loans gross charge-offs 54 47
Commercial and industrial | Commercial    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, term loans gross charge-offs, current fiscal year 0 1
Financing receivable, term loans gross charge-offs, year before current fiscal year 5 14
Financing receivable, term loans gross charge-offs, two years before current fiscal year 11 3
Financing receivable, term loans gross charge-offs, three years before current fiscal year 15 6
Financing receivable, term loans gross charge-offs, four years before current fiscal year 11 4
Financing receivable, term loans gross charge-offs, five years before current fiscal year 2 0
Financing receivable, revolver gross charge-offs 10 4
Financing receivable, revolver converted to term loans gross charge-offs 1 0
Financing receivable, term loans gross charge-offs 55 32
Commercial real estate | Commercial    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, term loans gross charge-offs, current fiscal year 0 0
Financing receivable, term loans gross charge-offs, year before current fiscal year 1 0
Financing receivable, term loans gross charge-offs, two years before current fiscal year 9 19
Financing receivable, term loans gross charge-offs, three years before current fiscal year 1 0
Financing receivable, term loans gross charge-offs, four years before current fiscal year 0 0
Financing receivable, term loans gross charge-offs, five years before current fiscal year 6 0
Financing receivable, revolver gross charge-offs 0 0
Financing receivable, revolver converted to term loans gross charge-offs 0 0
Financing receivable, term loans gross charge-offs 17 19
Lease financing | Commercial    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, term loans gross charge-offs, current fiscal year 0 0
Financing receivable, term loans gross charge-offs, year before current fiscal year 0 0
Financing receivable, term loans gross charge-offs, two years before current fiscal year 0 0
Financing receivable, term loans gross charge-offs, three years before current fiscal year 1 0
Financing receivable, term loans gross charge-offs, four years before current fiscal year 0 0
Financing receivable, term loans gross charge-offs, five years before current fiscal year 1 1
Financing receivable, revolver gross charge-offs 0 0
Financing receivable, revolver converted to term loans gross charge-offs 0 0
Financing receivable, term loans gross charge-offs 2 1
Residential mortgage | Consumer    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, term loans gross charge-offs, current fiscal year 0 0
Financing receivable, term loans gross charge-offs, year before current fiscal year 0 0
Financing receivable, term loans gross charge-offs, two years before current fiscal year 0 1
Financing receivable, term loans gross charge-offs, three years before current fiscal year 0 0
Financing receivable, term loans gross charge-offs, four years before current fiscal year 0 0
Financing receivable, term loans gross charge-offs, five years before current fiscal year 1 1
Financing receivable, revolver gross charge-offs 0 0
Financing receivable, revolver converted to term loans gross charge-offs 0 0
Financing receivable, term loans gross charge-offs 1 2
Automobile | Consumer    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, term loans gross charge-offs, current fiscal year 0 0
Financing receivable, term loans gross charge-offs, year before current fiscal year 4 3
Financing receivable, term loans gross charge-offs, two years before current fiscal year 5 4
Financing receivable, term loans gross charge-offs, three years before current fiscal year 4 2
Financing receivable, term loans gross charge-offs, four years before current fiscal year 2 1
Financing receivable, term loans gross charge-offs, five years before current fiscal year 0 2
Financing receivable, revolver gross charge-offs 0 0
Financing receivable, revolver converted to term loans gross charge-offs 0 0
Financing receivable, term loans gross charge-offs 15 12
Home equity | Consumer    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, term loans gross charge-offs, current fiscal year 0 0
Financing receivable, term loans gross charge-offs, year before current fiscal year 0 0
Financing receivable, term loans gross charge-offs, two years before current fiscal year 0 0
Financing receivable, term loans gross charge-offs, three years before current fiscal year 0 0
Financing receivable, term loans gross charge-offs, four years before current fiscal year 0 0
Financing receivable, term loans gross charge-offs, five years before current fiscal year 0 0
Financing receivable, revolver gross charge-offs 0 1
Financing receivable, revolver converted to term loans gross charge-offs 2 1
Financing receivable, term loans gross charge-offs 2 2
RV and marine | Consumer    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, term loans gross charge-offs, current fiscal year 0 0
Financing receivable, term loans gross charge-offs, year before current fiscal year 1 0
Financing receivable, term loans gross charge-offs, two years before current fiscal year 1 1
Financing receivable, term loans gross charge-offs, three years before current fiscal year 2 1
Financing receivable, term loans gross charge-offs, four years before current fiscal year 1 1
Financing receivable, term loans gross charge-offs, five years before current fiscal year 3 1
Financing receivable, revolver gross charge-offs 0 0
Financing receivable, revolver converted to term loans gross charge-offs 0 0
Financing receivable, term loans gross charge-offs 8 4
Other consumer | Consumer    
Financing Receivable, Credit Quality Indicator [Line Items]    
Financing receivable, term loans gross charge-offs, current fiscal year 1 1
Financing receivable, term loans gross charge-offs, year before current fiscal year 7 8
Financing receivable, term loans gross charge-offs, two years before current fiscal year 5 5
Financing receivable, term loans gross charge-offs, three years before current fiscal year 2 1
Financing receivable, term loans gross charge-offs, four years before current fiscal year 1 1
Financing receivable, term loans gross charge-offs, five years before current fiscal year 3 4
Financing receivable, revolver gross charge-offs 0 0
Financing receivable, revolver converted to term loans gross charge-offs 9 7
Financing receivable, term loans gross charge-offs $ 28 $ 27