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Loans and Related Allowance for Credit Losses (Aging Analysis) (Details) $ in Millions | Mar. 31, 2023 USD ($)
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Financing Receivable [Line Items] |
Financing receivable, aging analysis | $ 623
Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 581
30-59 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 19
60-89 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 5
90 Days Or More Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 18
Total commercial |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 497
Total commercial | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 491
Nonaccrual, aging analysis | 49
Total commercial | 30-59 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 5
Total commercial | 60-89 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 1
Total commercial | 30 Days or More Past Due |
Financing Receivable [Line Items] |
Nonaccrual, aging analysis | 5
Total commercial | Commercial and industrial |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 224
Total commercial | Commercial and industrial | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 218
Total commercial | Commercial and industrial | 30-59 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 5
Total commercial | Commercial and industrial | 60-89 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 1
Total commercial | Commercial real estate |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 273
Total commercial | Commercial real estate | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 273
Total consumer |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 126
Total consumer | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 90
Nonaccrual, aging analysis | 18
Total consumer | 30-59 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 14
Total consumer | 60-89 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 4
Total consumer | 90 Days Or More Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 18
Total consumer | 30 Days or More Past Due |
Financing Receivable [Line Items] |
Nonaccrual, aging analysis | 23
Total consumer | Residential real estate |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 49
Total consumer | Residential real estate | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 24
Total consumer | Residential real estate | 30-59 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 10
Total consumer | Residential real estate | 60-89 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 2
Total consumer | Residential real estate | 90 Days Or More Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 13
Total consumer | Home equity |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 5
Total consumer | Home equity | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 4
Total consumer | Home equity | 90 Days Or More Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 1
Total consumer | Credit card |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 13
Total consumer | Credit card | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 7
Total consumer | Credit card | 30-59 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 2
Total consumer | Credit card | 60-89 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 2
Total consumer | Credit card | 90 Days Or More Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 2
Total consumer | Education |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 58
Total consumer | Education | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 54
Total consumer | Education | 30-59 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 2
Total consumer | Education | 90 Days Or More Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 2
Total consumer | Other consumer |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | 1
Total consumer | Other consumer | Current or Less Than 30 Days Past Due |
Financing Receivable [Line Items] |
Financing receivable, aging analysis | $ 1

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