v3.26.1
LOANS, LEASES, AND ALLOWANCE FOR CREDIT LOSSES (Summary of Past Due Loans (Accruing and Nonaccruing)) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans $ 61,312 $ 60,900
90+ days past due 3 5
Nonaccrual loans that are current 279 315
Commercial:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 31,858 31,679
90+ days past due 2 3
Nonaccrual loans that are current 135 146
Commercial: | Commercial and industrial    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 18,263 18,111
90+ days past due 2 2
Nonaccrual loans that are current 83 93
Commercial: | Owner-occupied    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 9,323 9,274
90+ days past due 0 1
Nonaccrual loans that are current 50 51
Commercial: | Municipal    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 4,272 4,294
90+ days past due 0 0
Nonaccrual loans that are current 2 2
Commercial real estate:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 13,658 13,396
90+ days past due 0 1
Nonaccrual loans that are current 42 73
Commercial real estate: | Term    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 11,387 11,234
90+ days past due 0 1
Nonaccrual loans that are current 42 72
Commercial real estate: | Construction and land development    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 2,271 2,162
90+ days past due 0 0
Nonaccrual loans that are current   1
Consumer:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 15,796 15,825
90+ days past due 1 1
Nonaccrual loans that are current 102 96
Consumer: | 1-4 family residential    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 10,406 10,462
90+ days past due 0 0
Nonaccrual loans that are current 67 65
Consumer: | Home equity credit line    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 3,976 3,950
90+ days past due 0 0
Nonaccrual loans that are current 33 30
Consumer: | Construction and other consumer real estate    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 786 782
90+ days past due 0 0
Consumer: | Bankcard and other revolving plans    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 515 515
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 113 116
90+ days past due 0 0
Nonaccrual loans that are current 1  
Current    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 61,101 60,663
Current | Commercial:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 31,755 31,553
Current | Commercial: | Commercial and industrial    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 18,201 18,025
Current | Commercial: | Owner-occupied    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 9,282 9,235
Current | Commercial: | Municipal    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 4,272 4,293
Current | Commercial real estate:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 13,631 13,372
Current | Commercial real estate: | Term    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 11,360 11,211
Current | Commercial real estate: | Construction and land development    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 2,271 2,161
Current | Consumer:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 15,715 15,738
Current | Consumer: | 1-4 family residential    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 10,354 10,411
Current | Consumer: | Home equity credit line    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 3,953 3,920
Current | Consumer: | Construction and other consumer real estate    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 786 782
Current | Consumer: | Bankcard and other revolving plans    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 510 510
Current | Consumer: | Other    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 112 115
Total past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 211 237
Total past due | Commercial:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 103 126
Total past due | Commercial: | Commercial and industrial    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 62 86
Total past due | Commercial: | Owner-occupied    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 41 39
Total past due | Commercial: | Municipal    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 0 1
Total past due | Commercial real estate:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 27 24
Total past due | Commercial real estate: | Term    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 27 23
Total past due | Commercial real estate: | Construction and land development    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 0 1
Total past due | Consumer:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 81 87
Total past due | Consumer: | 1-4 family residential    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 52 51
Total past due | Consumer: | Home equity credit line    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 23 30
Total past due | Consumer: | Construction and other consumer real estate    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 0 0
Total past due | Consumer: | Bankcard and other revolving plans    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 5 5
Total past due | Consumer: | Other    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 1 1
30-89 days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 106 121
30-89 days past due | Commercial:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 56 87
30-89 days past due | Commercial: | Commercial and industrial    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 36 75
30-89 days past due | Commercial: | Owner-occupied    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 20 11
30-89 days past due | Commercial: | Municipal    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 0 1
30-89 days past due | Commercial real estate:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 6 1
30-89 days past due | Commercial real estate: | Term    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 6 1
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 44 33
30-89 days past due | Consumer: | 1-4 family residential    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 26 10
30-89 days past due | Consumer: | Home equity credit line    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 14 19
30-89 days past due | Consumer: | Construction and other consumer real estate    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 0 0
30-89 days past due | Consumer: | Bankcard and other revolving plans    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 3 3
30-89 days past due | Consumer: | Other    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 1 1
90+ days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 105 116
90+ days past due | Commercial:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 47 39
90+ days past due | Commercial: | Commercial and industrial    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 26 11
90+ days past due | Commercial: | Owner-occupied    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 21 28
90+ days past due | Commercial: | Municipal    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 0 0
90+ days past due | Commercial real estate:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 21 23
90+ days past due | Commercial real estate: | Term    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 21 22
90+ days past due | Commercial real estate: | Construction and land development    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 0 1
90+ days past due | Consumer:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 37 54
90+ days past due | Consumer: | 1-4 family residential    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 26 41
90+ days past due | Consumer: | Home equity credit line    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total loans 9 11
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 2 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 152 179
Nonaccrual loans that are current | Commercial:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Nonaccrual loans that are current 82 92
Nonaccrual loans that are current | Commercial: | Commercial and industrial    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Nonaccrual loans that are current 56 73
Nonaccrual loans that are current | Commercial: | Owner-occupied    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Nonaccrual loans that are current 24 17
Nonaccrual loans that are current | Commercial: | Municipal    
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 20 50
Nonaccrual loans that are current | Commercial real estate: | Term    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Nonaccrual loans that are current 20 50
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 50 37
Nonaccrual loans that are current | Consumer: | 1-4 family residential    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Nonaccrual loans that are current 29 21
Nonaccrual loans that are current | Consumer: | Home equity credit line    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Nonaccrual loans that are current 20 15
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 1 1
Nonaccrual loans that are current | Consumer: | Other    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Nonaccrual loans that are current $ 0 $ 0