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DERIVATIVES - Effect of Customer Derivatives and Economic Hedges on Net Income (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amounts Recognized in Noninterest Income | $ 190 | $ 57 | $ 357 | $ 100
Economic hedges | Foreign exchange and interest rate products | Customer interest rate contracts |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amounts Recognized in Noninterest Income | 196 | (84) | 850 | (363)
Economic hedges | Foreign exchange and interest rate products | Customer foreign exchange contracts |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amounts Recognized in Noninterest Income | (81) | 30 | (162) | (27)
Economic hedges | Foreign exchange and interest rate products | Derivatives transactions to hedge interest rate risk |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amounts Recognized in Noninterest Income | (182) | 97 | (809) | 403
Economic hedges | Foreign exchange and interest rate products | Derivatives transactions to hedge foreign exchange risk |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amounts Recognized in Noninterest Income | 130 | 24 | 224 | 99
Economic hedges | Mortgage banking fees | Residential loan commitments |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amounts Recognized in Noninterest Income | 6 | 6 | 22 | 6
Economic hedges | Mortgage banking fees | Forward sale contracts |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amounts Recognized in Noninterest Income | 29 | (13) | 24 | (15)
Economic hedges | Mortgage banking fees | Interest rate derivative contracts used to hedge residential MSRs |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amounts Recognized in Noninterest Income | $ 92 | $ (3) | $ 208 | $ (3)

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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