v3.25.2
LOANS, LEASES, AND ALLOWANCE FOR CREDIT LOSSES (Summary Aging Analysis, Modified) (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Jun. 30, 2024
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total $ 420 $ 318
Current    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 404 283
Total past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 16 35
30-89 days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 2 27
90+ days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 14 8
Commercial:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 72 107
Commercial: | Current    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 67 102
Commercial: | Total past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 5 5
Commercial: | 30-89 days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 2 1
Commercial: | 90+ days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 3 4
Commercial: | Commercial and industrial    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 67 88
Commercial: | Commercial and industrial | Current    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 63 83
Commercial: | Commercial and industrial | Total past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 4 5
Commercial: | Commercial and industrial | 30-89 days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 1 1
Commercial: | Commercial and industrial | 90+ days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 3 4
Commercial: | Owner-occupied    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 5 8
Commercial: | Owner-occupied | Current    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 4 8
Commercial: | Owner-occupied | Total past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 1 0
Commercial: | Owner-occupied | 30-89 days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 1 0
Commercial: | Owner-occupied | 90+ days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 0 0
Commercial: | Municipal    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   11
Commercial: | Municipal | Current    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   11
Commercial: | Municipal | Total past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   0
Commercial: | Municipal | 30-89 days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   0
Commercial: | Municipal | 90+ days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   0
Commercial real estate:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 341 205
Commercial real estate: | Current    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 331 175
Commercial real estate: | Total past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 10 30
Commercial real estate: | 30-89 days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 0 26
Commercial real estate: | 90+ days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 10 4
Commercial real estate: | Term    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 316 184
Commercial real estate: | Term | Current    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 306 156
Commercial real estate: | Term | Total past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 10 28
Commercial real estate: | Term | 30-89 days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 0 26
Commercial real estate: | Term | 90+ days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 10 2
Commercial real estate: | Construction and land development    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 25 21
Commercial real estate: | Construction and land development | Current    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 25 19
Commercial real estate: | Construction and land development | Total past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 0 2
Commercial real estate: | Construction and land development | 30-89 days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 0 0
Commercial real estate: | Construction and land development | 90+ days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 0 2
Consumer:    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   6
Consumer: | Current    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   6
Consumer: | Total past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   0
Consumer: | 30-89 days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   0
Consumer: | 90+ days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   0
Consumer: | 1-4 family residential    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 7 4
Consumer: | 1-4 family residential | Current    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 6 4
Consumer: | 1-4 family residential | Total past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 1 0
Consumer: | 1-4 family residential | 30-89 days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total 0 0
Consumer: | 1-4 family residential | 90+ days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total $ 1 0
Consumer: | Home equity credit line    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   1
Consumer: | Home equity credit line | Current    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   1
Consumer: | Home equity credit line | Total past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   0
Consumer: | Home equity credit line | 30-89 days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   0
Consumer: | Home equity credit line | 90+ days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   0
Consumer: | Other    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   1
Consumer: | Other | Current    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   1
Consumer: | Other | Total past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   0
Consumer: | Other | 30-89 days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   0
Consumer: | Other | 90+ days past due    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Total   $ 0