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MORTGAGE BANKING - Narrative (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | $ 125,713 | $ 119,088
Mortgage loans serviced for others | Banking Subsidiaries |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | $ 79,900 | $ 77,500

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- Definition Amount, before allowance for credit loss, of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919230-210447 + Details
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