v3.25.2
Loans and Related Allowance for Credit Losses (Aging Analysis) (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Jun. 30, 2024
Financing Receivable [Line Items]    
Financing receivable, aging analysis $ 2,487 $ 3,171
Current or Less Than 30 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 1,885 2,360
30-59 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 13 6
60-89 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 8 12
90 Days or More Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 7 8
Nonperforming Loans    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 574 785
Commercial Portfolio Segment    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 2,249 2,973
Commercial Portfolio Segment | Current or Less Than 30 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 1,829 2,296
Commercial Portfolio Segment | 30-59 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 9 1
Commercial Portfolio Segment | 60-89 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 4 8
Commercial Portfolio Segment | 90 Days or More Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 0
Commercial Portfolio Segment | Nonperforming Loans    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 407 668
Commercial Portfolio Segment | Commercial and industrial    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 1,236 1,562
Commercial Portfolio Segment | Commercial and industrial | Current or Less Than 30 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 1,117 1,318
Commercial Portfolio Segment | Commercial and industrial | 30-59 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 9 1
Commercial Portfolio Segment | Commercial and industrial | 60-89 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 4 8
Commercial Portfolio Segment | Commercial and industrial | 90 Days or More Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 0
Commercial Portfolio Segment | Commercial and industrial | Nonperforming Loans    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 106 235
Commercial Portfolio Segment | Commercial real estate    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 1,012 1,411
Commercial Portfolio Segment | Commercial real estate | Current or Less Than 30 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 711 978
Commercial Portfolio Segment | Commercial real estate | 30-59 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 0
Commercial Portfolio Segment | Commercial real estate | 60-89 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 0
Commercial Portfolio Segment | Commercial real estate | 90 Days or More Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 0
Commercial Portfolio Segment | Commercial real estate | Nonperforming Loans    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 301 433
Commercial Portfolio Segment | Equipment lease financing    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 1  
Commercial Portfolio Segment | Equipment lease financing | Current or Less Than 30 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 1  
Commercial Portfolio Segment | Equipment lease financing | 30-59 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0  
Commercial Portfolio Segment | Equipment lease financing | 60-89 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0  
Commercial Portfolio Segment | Equipment lease financing | 90 Days or More Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0  
Commercial Portfolio Segment | Equipment lease financing | Nonperforming Loans    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0  
Consumer Portfolio Segment    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 238 198
Consumer Portfolio Segment | Current or Less Than 30 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 56 64
Consumer Portfolio Segment | 30-59 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 4 5
Consumer Portfolio Segment | 60-89 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 4 4
Consumer Portfolio Segment | 90 Days or More Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 7 8
Consumer Portfolio Segment | Nonperforming Loans    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 167 117
Consumer Portfolio Segment | Residential real estate    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 142 97
Consumer Portfolio Segment | Residential real estate | Current or Less Than 30 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 5 9
Consumer Portfolio Segment | Residential real estate | 30-59 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 1 1
Consumer Portfolio Segment | Residential real estate | 60-89 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 0
Consumer Portfolio Segment | Residential real estate | 90 Days or More Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 1
Consumer Portfolio Segment | Residential real estate | Nonperforming Loans    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 136 86
Consumer Portfolio Segment | Home equity    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 33 32
Consumer Portfolio Segment | Home equity | Current or Less Than 30 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 5 3
Consumer Portfolio Segment | Home equity | 30-59 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 0
Consumer Portfolio Segment | Home equity | 60-89 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 0
Consumer Portfolio Segment | Home equity | 90 Days or More Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 0
Consumer Portfolio Segment | Home equity | Nonperforming Loans    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 28 29
Consumer Portfolio Segment | Credit card    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 55 61
Consumer Portfolio Segment | Credit card | Current or Less Than 30 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 40 45
Consumer Portfolio Segment | Credit card | 30-59 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 3 4
Consumer Portfolio Segment | Credit card | 60-89 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 4 4
Consumer Portfolio Segment | Credit card | 90 Days or More Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 7 7
Consumer Portfolio Segment | Credit card | Nonperforming Loans    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 1 1
Consumer Portfolio Segment | Education    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 4 6
Consumer Portfolio Segment | Education | Current or Less Than 30 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 4 6
Consumer Portfolio Segment | Education | 30-59 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 0
Consumer Portfolio Segment | Education | 60-89 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 0
Consumer Portfolio Segment | Education | 90 Days or More Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 0
Consumer Portfolio Segment | Education | Nonperforming Loans    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 0
Consumer Portfolio Segment | Other consumer    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 4 2
Consumer Portfolio Segment | Other consumer | Current or Less Than 30 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 2 1
Consumer Portfolio Segment | Other consumer | 30-59 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 0
Consumer Portfolio Segment | Other consumer | 60-89 Days Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 0
Consumer Portfolio Segment | Other consumer | 90 Days or More Past Due    
Financing Receivable [Line Items]    
Financing receivable, aging analysis 0 0
Consumer Portfolio Segment | Other consumer | Nonperforming Loans    
Financing Receivable [Line Items]    
Financing receivable, aging analysis $ 2 $ 1