DERIVATIVE FINANCIAL INSTRUMENTS - Cash Flow Hedges (Details) - USD ($) $ in Millions |
12 Months Ended | |
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Dec. 31, 2020 |
Dec. 31, 2019 |
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| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Notional value | $ 33,327 | $ 25,927 |
| Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness | 234 | 23 |
| Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | 37 | |
| Cash Flow Hedging | ||
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Notional value | 17,375 | 18,387 |
| Loans | ||
| Derivative Instruments, Gain (Loss) [Line Items] | ||
| Notional value | $ 18,646 | $ 18,375 |
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- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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 Nominal or face amount used to calculate payment on derivative. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The net gain (loss) during the reporting period due to ineffectiveness in interest rate cash flow hedges. Recognized in earnings. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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