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LOANS AND LEASES - Summary of Loans and Leases Portfolio (Details) - USD ($) $ in Millions | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | $ 127,528 | $ 119,088
Loans receivable held for sale | 3,300 | 3,300
SBA Loans Serviced For Others | CBNA and Other Subsidiaries |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 43 | 33
Mortgage loans serviced for others | CBNA and Other Subsidiaries |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 79,200 | 77,500
Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 66,032 | 57,538
Commercial | Commercial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 49,092 | 41,479
Commercial | Commercial real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 14,502 | 13,522
Commercial | Leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 2,438 | 2,537
Retail |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 61,496 | 61,550
Retail | Residential mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 18,721 | 19,083
Retail | Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 12,992 | 13,154
Retail | Automobile |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 12,157 | 12,120
Retail | Education |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 10,887 | 10,347
Retail | Other retail |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | $ 6,739 | $ 6,846

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- Definition The amount of all loans, held at fair value and otherwise, that will be sold to other entities. + References No definition available. + Details
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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=118952595&loc=d3e4428-111522 + Details
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