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MORTGAGE BANKING AND OTHER SERVICED LOANS - Other Serviced Loans (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Education |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Other serviced loans | $ 502 | $ 602
Commercial and Industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Other serviced loans | $ 94 | $ 91

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- Definition Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481260/860-50-45-2 + Details
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