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Allowance For Credit Losses (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing receivable no allowance | $ 151 | $ 280
Loans, net of unearned income | 97,009 | 98,379
Commercial Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned income | 56,306 | 56,033
Total Investor Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned income | 8,379 | 8,850
Consumer Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned income | 32,324 | 33,496
Collateral Dependent Member | Commercial Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned income | 162 | 220
Collateral Dependent Member | Total Investor Real Estate [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned income |  | 92
residential real estate and home equity loan and lines | Collateral Dependent Member | Consumer Portfolio Segment [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, net of unearned income | 105 | 93
Consumer Unsecured Loans sold in period |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Financing Receivables, book balance sold in period | 1,200 | 284
Allowance for loan losses, related to loans sold prior to sale | 94 | 27
Financing Receiable, Allowance for Credit loss, writeoff on loans sold | 63 | 35
Allowance for loans sold | $ 31 |
Loss on sale of loans recorded through provision expense |  | $ 8

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- Definition Amount of reduction of allowance reserve for credit loss arising from sale of loan and lease portfolios. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-15 + Details
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- Definition Amortized cost of financing receivable on nonaccrual status with no allowance for credit loss. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-16 + Details
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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481990/310-10-45-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-4 + Details
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