LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - Certain Loans Acquired Ending and Unpaid Balances (Details) - USD ($) $ in Millions |
Mar. 31, 2018 |
Dec. 31, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
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| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Purchased Credit Impaired, Ending Balance | $ 41 | |||
| Total ALLL balance | $ 721 | 691 | $ 673 | $ 638 |
| Commercial | ||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Total ALLL balance | $ 515 | 482 | $ 480 | $ 451 |
| Commercial | Commercial and Industrial | ||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Purchased Credit Impaired, Ending Balance | $ 39 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses). This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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