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LOANS AND LEASES - Summary of Loans and Leases Portfolio (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | $ 156,662 | $ 128,163
Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 82,180 | 60,350
Commercial | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 51,836 | 44,500
Commercial | Commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 28,865 | 14,264
Commercial | Leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 1,479 | 1,586
Retail |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 74,482 | 67,813
Retail | Residential mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 29,921 | 22,822
Retail | Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 14,043 | 12,015
Retail | Automobile |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 12,292 | 14,549
Retail | Education |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 12,808 | 12,997
Retail | Other retail |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | $ 5,418 | $ 5,430

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