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Loans and Related Allowance for Credit Losses (Aging Analysis) (Details) $ in Millions | Sep. 30, 2023 USD ($)
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Financing Receivable [Line Items] |
Financing receivable, aging analysis | $ 1,946
Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 1,595
30-59 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 5
60-89 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 3
90 Days or More Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 9
Nonperforming Loans |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 334
Total commercial |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 1,782
Total commercial | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 1,556
Total commercial | 60-89 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis |
Total commercial | 90 Days or More Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 3
Total commercial | Nonperforming Loans |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 223
Total commercial | Commercial and industrial |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 960
Total commercial | Commercial and industrial | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 801
Total commercial | Commercial and industrial | 60-89 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis |
Total commercial | Commercial and industrial | 90 Days or More Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 3
Total commercial | Commercial and industrial | Nonperforming Loans |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 156
Total commercial | Commercial real estate |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 822
Total commercial | Commercial real estate | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 755
Total commercial | Commercial real estate | Nonperforming Loans |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 67
Total consumer |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 164
Total consumer | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 39
Total consumer | 30-59 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 5
Total consumer | 60-89 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 3
Total consumer | 90 Days or More Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 6
Total consumer | Nonperforming Loans |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 111
Total consumer | Residential real estate |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 93
Total consumer | Residential real estate | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 4
Total consumer | Residential real estate | 30-59 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 1
Total consumer | Residential real estate | Nonperforming Loans |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 88
Total consumer | Home equity |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 22
Total consumer | Home equity | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 1
Total consumer | Home equity | Nonperforming Loans |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 21
Total consumer | Credit card |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 45
Total consumer | Credit card | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 31
Total consumer | Credit card | 30-59 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 4
Total consumer | Credit card | 60-89 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 3
Total consumer | Credit card | 90 Days or More Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 6
Total consumer | Credit card | Nonperforming Loans |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 1
Total consumer | Education |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 3
Total consumer | Education | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 3
Total consumer | Other consumer |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 1
Total consumer | Other consumer | Nonperforming Loans |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | $ 1

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