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Loans and Leases - Schedule Of Loans By Portfolio Segment (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases | $ 54,859 | $ 58,232 |  |
Allowance for loan and lease losses | (670) | (963) | $ (200) | $ (180)
Net loans and leases | 54,189 | 57,269 |  |
Equipment |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Property, plant, and equipment and finance leases | 792 | 587 |  |
Commercial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases | 31,068 | 33,104 |  |
Commercial | Commercial and Industrial, Excluding Loans to Mortgage Companies |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases | 26,550 | 27,700 |  |
Commercial | Loans to mortgage companies |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases | 4,518 | 5,404 |  |
Commercial | Commercial and industrial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases | 31,068 | 33,104 |  |
Allowance for loan and lease losses | (334) | (453) | (123) | (99)
Commercial | Commercial and industrial | Paycheck Protection Plan |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases | 1,000 | 4,100 |  |
Commercial | Commercial real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases | 12,109 | 12,275 |  |
Allowance for loan and lease losses | (154) | (242) | (36) | (31)
Consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases | 10,772 | 11,725 |  |
Consumer | HELOC |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases | 1,964 | 2,420 |  |
Consumer | Real estate installment loans |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases | 8,808 | 9,305 |  |
Consumer | Credit card and other |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases | 910 | 1,128 |  |
Allowance for loan and lease losses | $ (19) | $ (26) | $ (13) | $ (13)

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