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DERIVATIVES - Schedule of Fair Value Hedges (Details) - Hedge of interest rate risk - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Interest Income, Loans Held for Sale |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Hedged Item | $ 0 | $ 0 | $ (13)
Derivative | 0 | 0 | 13
Amounts related to interest settlements on derivatives | 0 | 0 | 0
Total net interest income recognized on fair value hedges | 0 | 0 | 0
Interest Income, Investment Securities |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Hedged Item | (142) | 50 | (29)
Derivative | 147 | (48) | 29
Amounts related to interest settlements on derivatives | 107 | 10 | (3)
Total net interest income recognized on fair value hedges | 112 | 12 | (3)
Interest Expense |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Hedged Item | (8) | (10) | 68
Derivative | 8 | 10 | (69)
Amounts related to interest settlements on derivatives | (14) | (16) | 12
Total net interest income recognized on fair value hedges | $ (14) | $ (16) | $ 11

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- Definition Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 815 -SubTopic 25 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480238/815-25-50-1 + Details
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- Definition Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 815 -SubTopic 25 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480238/815-25-50-1 + Details
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- Definition Amount of gain (loss) on derivative instrument designated and qualifying as fair value hedge included in assessment of hedge effectiveness, recognized in earnings. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480627/815-20-45-1A + Details
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