DERIVATIVE FINANCIAL INSTRUMENTS - Schedule of Derivative Instruments Fair Value Hedges (Details) - Qualifying Hedges - Interest rate contracts - Fair Value Hedges - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net loss on fair value hedges	$ (2)	$ (1)	$ 0
Deposits
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Recognized on derivatives	0	0	0
Recognized on hedged item	(1)	0	0
Borrowings
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Recognized on derivatives	(4)	4	0
Recognized on hedged item	$ 3	$ (5)	$ 0

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.

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

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Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

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Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (a)
-Publisher FASB
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