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VARIABLE INTEREST ENTITIES - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Variable Interest Entity |  |  |  |  |
Lending to special purpose entities included in loans and leases | $ 123,318,000,000 |  | $ 123,318,000,000 |  | $ 123,090,000,000
LIHTC Investments |  |  |  |  |
Variable Interest Entity |  |  |  |  |
Net impairment losses recognized in earnings | 0 | $ 0 | 0 | $ 0 |
Commitments to extend credit | Special Purpose Entities |  |  |  |  |
Variable Interest Entity |  |  |  |  |
Commitment amount | 2,200,000,000 |  | 2,200,000,000 |  | 1,500,000,000
Commercial and industrial | Special Purpose Entities |  |  |  |  |
Variable Interest Entity |  |  |  |  |
Lending to special purpose entities included in loans and leases | 1,849,000,000 |  | 1,849,000,000 |  | 1,295,000,000
Retail |  |  |  |  |
Variable Interest Entity |  |  |  |  |
Lending to special purpose entities included in loans and leases | 65,363,000,000 |  | 65,363,000,000 |  | 62,297,000,000
Retail | Education |  |  |  |  |
Variable Interest Entity |  |  |  |  |
Lending to special purpose entities included in loans and leases | $ 13,000,000,000 |  | $ 13,000,000,000 |  | $ 12,308,000,000

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