v3.26.1
Asset Quality - Schedule of Performance of Loans That Have Been Modified in the Last 12 Months (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Jun. 30, 2025
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months $ 532 $ 516
Current    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 463 426
30-89 Days  Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 16 65
90 and Greater Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 53 25
Total commercial loans    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 508 480
Total commercial loans | Current    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 441 393
Total commercial loans | 30-89 Days  Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 14 63
Total commercial loans | 90 and Greater Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 53 24
Total commercial loans | Commercial and Industrial    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 388 165
Total commercial loans | Commercial and Industrial | Current    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 365 149
Total commercial loans | Commercial and Industrial | 30-89 Days  Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 14 13
Total commercial loans | Commercial and Industrial | 90 and Greater Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 9 3
Total commercial loans | Total commercial real estate loans    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 120 315
Total commercial loans | Total commercial real estate loans | Current    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 76 244
Total commercial loans | Total commercial real estate loans | 30-89 Days  Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 0 50
Total commercial loans | Total commercial real estate loans | 90 and Greater Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 44 21
Total commercial loans | Commercial mortgage    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 120 281
Total commercial loans | Commercial mortgage | Current    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 76 210
Total commercial loans | Commercial mortgage | 30-89 Days  Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 0 50
Total commercial loans | Commercial mortgage | 90 and Greater Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 44 21
Total commercial loans | Construction    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months   34
Total commercial loans | Construction | Current    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months   34
Total commercial loans | Construction | 30-89 Days  Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months   0
Total commercial loans | Construction | 90 and Greater Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months   0
Total consumer loans    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 24 36
Total consumer loans | Current    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 22 33
Total consumer loans | 30-89 Days  Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 2 2
Total consumer loans | 90 and Greater Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 0 1
Total consumer loans | Real estate — residential mortgage    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 10 16
Total consumer loans | Real estate — residential mortgage | Current    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 9 14
Total consumer loans | Real estate — residential mortgage | 30-89 Days  Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 1 2
Total consumer loans | Real estate — residential mortgage | 90 and Greater Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 0 0
Total consumer loans | Home equity loans    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 9 11
Total consumer loans | Home equity loans | Current    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 8 10
Total consumer loans | Home equity loans | 30-89 Days  Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 1 0
Total consumer loans | Home equity loans | 90 and Greater Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 0 1
Total consumer loans | Other consumer loans    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 3 5
Total consumer loans | Other consumer loans | Current    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 3 5
Total consumer loans | Other consumer loans | 30-89 Days  Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 0 0
Total consumer loans | Other consumer loans | 90 and Greater Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 0 0
Total consumer loans | Credit cards    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 2 4
Total consumer loans | Credit cards | Current    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 2 4
Total consumer loans | Credit cards | 30-89 Days  Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months 0 0
Total consumer loans | Credit cards | 90 and Greater Days Past Due    
Financing Receivable, Past Due [Line Items]    
Total loans modified in last 12 months $ 0 $ 0