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LOANS, LEASES, AND ALLOWANCE FOR CREDIT LOSSES (Summary of Past Due Loans (Accruing and Nonaccruing)) (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | $ 60,302 | $ 59,410
90+ days past due | 5 | 18
Nonaccrual loans that are current | 319 | 297
Commercial: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 31,179 | 30,965
90+ days past due | 3 | 14
Nonaccrual loans that are current | 153 | 158
Commercial: | Commercial and industrial |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 17,222 | 16,891
90+ days past due | 3 | 1
Nonaccrual loans that are current | 107 | 114
Commercial: | Owner-occupied |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 9,267 | 9,333
90+ days past due | 0 | 3
Nonaccrual loans that are current | 40 | 31
Commercial: | Municipal |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 4,341 | 4,364
90+ days past due | 0 | 10
Nonaccrual loans that are current | 2 | 11
Commercial: | Leasing |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 349 | 377
90+ days past due | 0 | 0
Nonaccrual loans that are current | 4 | 2
Commercial real estate: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 13,477 | 13,477
90+ days past due | 1 | 3
Nonaccrual loans that are current | 70 | 59
Commercial real estate: | Term |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 11,008 | 10,703
90+ days past due | 1 | 3
Nonaccrual loans that are current | 70 | 59
Commercial real estate: | Construction and land development |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 2,469 | 2,774
90+ days past due | 0 | 0
Consumer: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 15,646 | 14,968
90+ days past due | 1 | 1
Nonaccrual loans that are current | 96 | 80
Consumer: | 1-4 family residential |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 10,423 | 9,939
90+ days past due | 0 | 0
Nonaccrual loans that are current | 63 | 49
Consumer: | Home equity credit line |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 3,848 | 3,641
90+ days past due | 0 | 0
Nonaccrual loans that are current | 32 | 30
Consumer: | Construction and other consumer real estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 769 | 810
90+ days past due | 0 | 0
Consumer: | Bankcard and other revolving plans |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 477 | 457
90+ days past due | 1 | 1
Nonaccrual loans that are current | 1 | 1
Consumer: | Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 129 | 121
90+ days past due | 0 | 0
Current |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 60,081 | 59,221
Current | Commercial: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 31,107 | 30,891
Current | Commercial: | Commercial and industrial |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 17,188 | 16,857
Current | Commercial: | Owner-occupied |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 9,231 | 9,309
Current | Commercial: | Municipal |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 4,341 | 4,348
Current | Commercial: | Leasing |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 347 | 377
Current | Commercial real estate: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 13,410 | 13,441
Current | Commercial real estate: | Term |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 10,941 | 10,667
Current | Commercial real estate: | Construction and land development |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 2,469 | 2,774
Current | Consumer: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 15,564 | 14,889
Current | Consumer: | 1-4 family residential |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 10,374 | 9,896
Current | Consumer: | Home equity credit line |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 3,820 | 3,609
Current | Consumer: | Construction and other consumer real estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 768 | 810
Current | Consumer: | Bankcard and other revolving plans |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 473 | 453
Current | Consumer: | Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 129 | 121
Total past due |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 221 | 189
Total past due | Commercial: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 72 | 74
Total past due | Commercial: | Commercial and industrial |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 34 | 34
Total past due | Commercial: | Owner-occupied |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 36 | 24
Total past due | Commercial: | Municipal |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 0 | 16
Total past due | Commercial: | Leasing |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 2 | 0
Total past due | Commercial real estate: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 67 | 36
Total past due | Commercial real estate: | Term |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 67 | 36
Total past due | Commercial real estate: | Construction and land development |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 0 | 0
Total past due | Consumer: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 82 | 79
Total past due | Consumer: | 1-4 family residential |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 49 | 43
Total past due | Consumer: | Home equity credit line |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 28 | 32
Total past due | Consumer: | Construction and other consumer real estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 1 | 0
Total past due | Consumer: | Bankcard and other revolving plans |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 4 | 4
Total past due | Consumer: | Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 0 | 0
30-89 days past due |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 103 | 76
30-89 days past due | Commercial: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 36 | 36
30-89 days past due | Commercial: | Commercial and industrial |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 18 | 20
30-89 days past due | Commercial: | Owner-occupied |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 17 | 10
30-89 days past due | Commercial: | Municipal |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 0 | 6
30-89 days past due | Commercial: | Leasing |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 1 | 0
30-89 days past due | Commercial real estate: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 35 | 2
30-89 days past due | Commercial real estate: | Term |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 35 | 2
30-89 days past due | Commercial real estate: | Construction and land development |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 0 | 0
30-89 days past due | Consumer: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 32 | 38
30-89 days past due | Consumer: | 1-4 family residential |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 12 | 16
30-89 days past due | Consumer: | Home equity credit line |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 16 | 20
30-89 days past due | Consumer: | Construction and other consumer real estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 1 | 0
30-89 days past due | Consumer: | Bankcard and other revolving plans |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 3 | 2
30-89 days past due | Consumer: | Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 0 | 0
90+ days past due |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 118 | 113
90+ days past due | Commercial: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 36 | 38
90+ days past due | Commercial: | Commercial and industrial |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 16 | 14
90+ days past due | Commercial: | Owner-occupied |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 19 | 14
90+ days past due | Commercial: | Municipal |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 0 | 10
90+ days past due | Commercial: | Leasing |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 1 | 0
90+ days past due | Commercial real estate: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 32 | 34
90+ days past due | Commercial real estate: | Term |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 32 | 34
90+ days past due | Commercial real estate: | Construction and land development |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 0 | 0
90+ days past due | Consumer: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 50 | 41
90+ days past due | Consumer: | 1-4 family residential |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 37 | 27
90+ days past due | Consumer: | Home equity credit line |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 12 | 12
90+ days past due | Consumer: | Construction and other consumer real estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 0 | 0
90+ days past due | Consumer: | Bankcard and other revolving plans |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 1 | 2
90+ days past due | Consumer: | Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans | 0 | 0
Nonaccrual loans that are current |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Nonaccrual loans that are current | 173 | 183
Nonaccrual loans that are current | Commercial: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Nonaccrual loans that are current | 111 | 127
Nonaccrual loans that are current | Commercial: | Commercial and industrial |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Nonaccrual loans that are current | 92 | 98
Nonaccrual loans that are current | Commercial: | Owner-occupied |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Nonaccrual loans that are current | 15 | 16
Nonaccrual loans that are current | Commercial: | Municipal |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Nonaccrual loans that are current | 2 | 11
Nonaccrual loans that are current | Commercial: | Leasing |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Nonaccrual loans that are current | 2 | 2
Nonaccrual loans that are current | Commercial real estate: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Nonaccrual loans that are current | 23 | 28
Nonaccrual loans that are current | Commercial real estate: | Term |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Nonaccrual loans that are current | 23 | 28
Nonaccrual loans that are current | Commercial real estate: | Construction and land development |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Nonaccrual loans that are current | 0 | 0
Nonaccrual loans that are current | Consumer: |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Nonaccrual loans that are current | 39 | 28
Nonaccrual loans that are current | Consumer: | 1-4 family residential |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Nonaccrual loans that are current | 23 | 15
Nonaccrual loans that are current | Consumer: | Home equity credit line |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Nonaccrual loans that are current | 15 | 13
Nonaccrual loans that are current | Consumer: | Construction and other consumer real estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Nonaccrual loans that are current | 0 | 0
Nonaccrual loans that are current | Consumer: | Bankcard and other revolving plans |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Nonaccrual loans that are current | 0 | 0
Nonaccrual loans that are current | Consumer: | Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Nonaccrual loans that are current | $ 1 | $ 0

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