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Loans and Leases - Accruing And Non-Accruing Loans By Class (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current, accruing | $ 60,724 | $ 57,648
Total accruing | 60,830 | 57,786
Current, non-accruing | 228 | 160
Total non-accruing | 462 | 316
Loans and leases | 61,292 | 58,102
30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 85 | 105
Past due, non-accruing | 30 | 19
90+ Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 21 | 33
Past due, non-accruing | 204 | 137
Commercial | Commercial, financial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current, accruing | 32,416 | 31,567
Total accruing | 32,449 | 31,628
Current, non-accruing | 113 | 64
Total non-accruing | 184 | 153
Loans and leases | 32,633 | 31,781
Commercial | Commercial, financial and industrial | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 32 | 50
Past due, non-accruing | 18 | 10
Commercial | Commercial, financial and industrial | 90+ Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 1 | 11
Past due, non-accruing | 53 | 79
Commercial | Commercial, financial and industrial | C&I |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current, accruing | 30,403 | 29,309
Total accruing | 30,435 | 29,370
Current, non-accruing | 108 | 64
Total non-accruing | 179 | 153
Loans and leases | 30,614 | 29,523
Nonaccrual, no allowance | 178 | 147
Commercial | Commercial, financial and industrial | C&I | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 31 | 50
Past due, non-accruing | 18 | 10
Commercial | Commercial, financial and industrial | C&I | 90+ Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 1 | 11
Past due, non-accruing | 53 | 79
Commercial | Commercial, financial and industrial | Loans to mortgage companies |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current, accruing | 2,013 | 2,258
Total accruing | 2,014 | 2,258
Current, non-accruing | 5 | 0
Total non-accruing | 5 | 0
Loans and leases | 2,019 | 2,258
Commercial | Commercial, financial and industrial | Loans to mortgage companies | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 1 | 0
Past due, non-accruing | 0 | 0
Commercial | Commercial, financial and industrial | Loans to mortgage companies | 90+ Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 0 | 0
Past due, non-accruing | 0 | 0
Commercial | Commercial, financial and industrial | CRE |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual, no allowance | 129 | 5
Commercial | Commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 14,216 | 13,228
Commercial | Commercial real estate | CRE |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current, accruing | 14,072 | 13,208
Total accruing | 14,080 | 13,219
Current, non-accruing | 41 | 7
Total non-accruing | 136 | 9
Loans and leases | 14,216 | 13,228
Commercial | Commercial real estate | CRE | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 8 | 11
Past due, non-accruing | 0 | 0
Commercial | Commercial real estate | CRE | 90+ Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 0 | 0
Past due, non-accruing | 95 | 2
Commercial | Credit Card and Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 180 | 193
Consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 13,650 | 12,253
Consumer | Consumer real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current, accruing | 13,453 | 12,046
Total accruing | 13,510 | 12,101
Current, non-accruing | 73 | 88
Total non-accruing | 140 | 152
Loans and leases | 13,650 | 12,253
Consumer | Consumer real estate | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 40 | 37
Past due, non-accruing | 12 | 9
Consumer | Consumer real estate | 90+ Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 17 | 18
Past due, non-accruing | 55 | 55
Consumer | Consumer real estate | HELOC |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current, accruing | 2,158 | 1,967
Total accruing | 2,173 | 1,984
Current, non-accruing | 30 | 32
Total non-accruing | 46 | 44
Loans and leases | 2,219 | 2,028
Nonaccrual, no allowance | 4 | 5
Consumer | Consumer real estate | HELOC | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 11 | 12
Past due, non-accruing | 6 | 4
Consumer | Consumer real estate | HELOC | 90+ Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 4 | 5
Past due, non-accruing | 10 | 8
Consumer | Consumer real estate | Real estate installment loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current, accruing | 11,295 | 10,079
Total accruing | 11,337 | 10,117
Current, non-accruing | 43 | 56
Total non-accruing | 94 | 108
Loans and leases | 11,431 | 10,225
Nonaccrual, no allowance | 10 | 7
Consumer | Consumer real estate | Real estate installment loans | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 29 | 25
Past due, non-accruing | 6 | 5
Consumer | Consumer real estate | Real estate installment loans | 90+ Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 13 | 13
Past due, non-accruing | 45 | 47
Consumer | Credit Card and Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current, accruing | 783 | 827
Total accruing | 791 | 838
Current, non-accruing | 1 | 1
Total non-accruing | 2 | 2
Loans and leases | 793 | 840
Consumer | Credit Card and Other | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 5 | 7
Past due, non-accruing | 0 | 0
Consumer | Credit Card and Other | 90+ Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 3 | 4
Past due, non-accruing | 1 | 1
Consumer | Credit Card and Other | Credit card |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current, accruing | 271 | 287
Total accruing | 277 | 296
Current, non-accruing | 0 | 0
Total non-accruing | 0 | 0
Loans and leases | 277 | 296
Consumer | Credit Card and Other | Credit card | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 3 | 5
Past due, non-accruing | 0 | 0
Consumer | Credit Card and Other | Credit card | 90+ Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 3 | 4
Past due, non-accruing | 0 | 0
Consumer | Credit Card and Other | Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current, accruing | 512 | 540
Total accruing | 514 | 542
Current, non-accruing | 1 | 1
Total non-accruing | 2 | 2
Loans and leases | 516 | 544
Consumer | Credit Card and Other | Other | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 2 | 2
Past due, non-accruing | 0 | 0
Consumer | Credit Card and Other | Other | 90+ Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Past due, accruing | 0 | 0
Past due, non-accruing | $ 1 | $ 1

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