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Allowance For Credit Losses (TDRs on Financing Receivables) (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($) obligor | Dec. 31, 2021 USD ($) obligor
Financing Receivable, Modifications [Line Items] |  |
Number of Obligors | obligor | 1,360 | 755
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 385 | $ 301
Increase in Allowance at Modification | $ 10 | $ 8
Commercial And Industrial [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Obligors | obligor | 50 | 65
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 174 | $ 116
Increase in Allowance at Modification | $ 0 | $ 0
Commercial Real Estate Mortgage - Owner-Occupied [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Obligors | obligor | 11 | 28
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 5 | $ 11
Increase in Allowance at Modification | $ 0 | $ 0
Commercial Real Estate Construction - Owner-Occupied [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Obligors | obligor | 0 | 2
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 3 | $ 2
Increase in Allowance at Modification | $ 0 | $ 0
Commercial investor real estate mortgage [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Obligors | obligor | 5 | 8
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 48 | $ 77
Increase in Allowance at Modification | $ 0 | $ 0
Commercial Investor Real Estate Construction [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Obligors | obligor | 0 | 0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 0 | $ 0
Increase in Allowance at Modification | $ 0 | $ 0
Residential First Mortgage [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Obligors | obligor | 983 | 492
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 135 | $ 85
Increase in Allowance at Modification | $ 6 | $ 8
Home Equity Lines of Credit[Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Obligors | obligor | 94 | 7
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 6 | $ 1
Increase in Allowance at Modification | $ 4 | $ 0
Home Equity Loan [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Obligors | obligor | 208 | 72
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 14 | $ 6
Increase in Allowance at Modification | $ 0 | $ 0
Consumer Credit Card Financing Receivable [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Obligors | obligor | 4 | 1
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 0 | $ 0
Increase in Allowance at Modification | $ 0 | $ 0
Other consumer- exit portfolios |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Obligors | obligor | 0 | 0
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 0 | $ 0
Increase in Allowance at Modification | $ 0 | $ 0
Indirect-vehicles and other consumer [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Obligors | obligor | 5 | 80
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 0 | $ 3
Increase in Allowance at Modification | $ 0 | $ 0
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Obligors | obligor | 61 | 95
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 182 | $ 129
Increase in Allowance at Modification | $ 0 | $ 0
Total Investor Real Estate [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Obligors | obligor | 5 | 8
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 48 | $ 77
Increase in Allowance at Modification | $ 0 | $ 0
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Obligors | obligor | 1,294 | 652
Financing Receivable, Modifications, Post-Modification Recorded Investment | $ 155 | $ 95
Increase in Allowance at Modification | $ 10 | $ 8

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- Definition Amount of other addition (reduction) in allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524 + Details
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