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v3.21.2

Loans and the Allowance for Credit Losses (Loans By Class Modified In TDR) (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 USD ($) obligor | Jun. 30, 2020 USD ($) obligor | Jun. 30, 2021 USD ($) obligor | Jun. 30, 2020 USD ($) obligor
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Obligors | obligor | 202 | 120 | 462 | 244
Financing Receivable, Troubled Debt Restructuring, Postmodification | $ 120 | $ 128 | $ 194 | $ 214
Increase in Allowance at Modification | $ 2 | $ 1 | $ 5 | $ 2
Commercial And Industrial [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Obligors | obligor | 15 | 67 | 41 | 93
Financing Receivable, Troubled Debt Restructuring, Postmodification | $ 20 | $ 120 | $ 50 | $ 194
Increase in Allowance at Modification | $ 0 | $ 0 | $ 0 | $ 0
Commercial Real Estate Mortgage - Owner-Occupied [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Obligors | obligor | 8 | 5 | 14 | 10
Financing Receivable, Troubled Debt Restructuring, Postmodification | $ 2 | $ 3 | $ 3 | $ 5
Increase in Allowance at Modification | $ 0 | $ 0 | $ 0 | $ 0
Commercial Real Estate Construction - Owner-Occupied [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Obligors | obligor | 1 | 0 | 1 | 1
Financing Receivable, Troubled Debt Restructuring, Postmodification | $ 1 | $ 0 | $ 1 | $ 1
Increase in Allowance at Modification | $ 0 | $ 0 | $ 0 | $ 0
Commercial investor real estate mortgage [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Obligors | obligor | 4 | 3 | 6 | 7
Financing Receivable, Troubled Debt Restructuring, Postmodification | $ 69 | $ 0 | $ 76 | $ 1
Increase in Allowance at Modification | $ 0 | $ 0 | $ 0 | $ 0
Commercial Investor Real Estate Construction [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Obligors | obligor | 0 | 0 | 0 | 1
Financing Receivable, Troubled Debt Restructuring, Postmodification | $ 0 | $ 0 | $ 0 | $ 0
Increase in Allowance at Modification | $ 0 | $ 0 | $ 0 | $ 0
Residential First Mortgage [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Obligors | obligor | 161 | 31 | 336 | 83
Financing Receivable, Troubled Debt Restructuring, Postmodification | $ 26 | $ 4 | $ 61 | $ 11
Increase in Allowance at Modification | $ 2 | $ 1 | $ 5 | $ 2
Home Equity Line [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Obligors | obligor | 3 | 0 | 5 | 0
Financing Receivable, Troubled Debt Restructuring, Postmodification | $ 1 | $ 0 | $ 1 | $ 0
Increase in Allowance at Modification | $ 0 | $ 0 | $ 0 | $ 0
Home Equity Loan [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Obligors | obligor | 6 | 12 | 7 | 27
Financing Receivable, Troubled Debt Restructuring, Postmodification | $ 1 | $ 1 | $ 1 | $ 2
Increase in Allowance at Modification | $ 0 | $ 0 | $ 0 | $ 0
Consumer Credit Card [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Obligors | obligor | 0 | 1 | 0 | 11
Financing Receivable, Troubled Debt Restructuring, Postmodification | $ 0 | $ 0 | $ 0 | $ 0
Increase in Allowance at Modification | $ 0 | $ 0 | $ 0 | $ 0
Indirect-vehicles and other consumer [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Obligors | obligor | 4 | 1 | 52 | 11
Financing Receivable, Troubled Debt Restructuring, Postmodification | $ 0 | $ 0 | $ 1 | $ 0
Increase in Allowance at Modification | $ 0 | $ 0 | $ 0 | $ 0
Commercial Portfolio Segment [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Obligors | obligor | 24 | 72 | 56 | 104
Financing Receivable, Troubled Debt Restructuring, Postmodification | $ 23 | $ 123 | $ 54 | $ 200
Increase in Allowance at Modification | $ 0 | $ 0 | $ 0 | $ 0
Total Investor Real Estate [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Obligors | obligor | 4 | 3 | 6 | 8
Financing Receivable, Troubled Debt Restructuring, Postmodification | $ 69 | $ 0 | $ 76 | $ 1
Increase in Allowance at Modification | $ 0 | $ 0 | $ 0 | $ 0
Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of Obligors | obligor | 174 | 45 | 400 | 132
Financing Receivable, Troubled Debt Restructuring, Postmodification | $ 28 | $ 5 | $ 64 | $ 13
Increase in Allowance at Modification | $ 2 | $ 1 | $ 5 | $ 2

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