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LOANS AND LEASES - Summary of Loans and Leases Portfolio (Details) - USD ($) | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | $ 116,838,000,000 | $ 116,660,000,000
Loans receivable held for sale | 2,200,000,000 | 1,300,000,000
SBA Loans Serviced For Others | Banking and Other Subsidiaries |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 18,000,000 | 0
Mortgage loans serviced for others | Banking and Other Subsidiaries |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 72,500,000,000 | 69,600,000,000
Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 56,963,000,000 | 56,783,000,000
Commercial | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 41,156,000,000 | 40,857,000,000
Commercial | Commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 13,123,000,000 | 13,023,000,000
Commercial | Leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 2,684,000,000 | 2,903,000,000
Retail |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 59,875,000,000 | 59,877,000,000
Retail | Residential mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 19,192,000,000 | 18,978,000,000
Retail | Home equity loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 938,000,000 | 1,073,000,000
Retail | Home equity lines of credit |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 12,266,000,000 | 12,710,000,000
Retail | Home equity loans serviced by others |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 348,000,000 | 399,000,000
Retail | Home equity lines of credit serviced by others |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 88,000,000 | 104,000,000
Retail | Automobile |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 12,000,000,000 | 12,106,000,000
Retail | Education |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 9,305,000,000 | 8,900,000,000
Retail | Credit cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 2,046,000,000 | 1,991,000,000
Retail | Other retail |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | $ 3,692,000,000 | $ 3,616,000,000

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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
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