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VARIABLE INTEREST ENTITIES - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Variable Interest Entity [Line Items] |  |  |
Loans and leases | [1],[2] | $ 116,660,000,000 | $ 110,617,000,000
LIHTC Investments |  |  |
Variable Interest Entity [Line Items] |  |  |
Net impairment losses recognized in earnings |  | 0 | 0
Commercial | Special Purpose Entities |  |  |
Variable Interest Entity [Line Items] |  |  |
Loans and leases |  | 613,000,000 | $ 0
Undrawn commitments to extend credit | Special Purpose Entities |  |  |
Variable Interest Entity [Line Items] |  |  |
Undrawn commitments to extend credit |  | $ 584,000,000 |
[1] | Excluded from the table above are loans held for sale totaling $1.3 billion and $718 million as of December 31, 2018 and 2017, respectively.
[2] | Mortgage loans serviced for others by the Company’s subsidiaries are not included above, and amounted to $69.6 billion and $20.3 billion at December 31, 2018 and 2017, respectively.

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