DERIVATIVE FINANCIAL INSTRUMENTS - Schedule of Fair Value Hedges (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Long-term borrowings
Fair Value, Option, Quantitative Disclosures [Line Items]
Carrying Value of Hedged Items	$ 219	$ 795
Deposits
Fair Value, Option, Quantitative Disclosures [Line Items]
Carrying Value of Hedged Items	134	335
Currently Designated \| Long-term borrowings
Fair Value, Option, Quantitative Disclosures [Line Items]
Cumulative Fair Value Hedging Adjustment Included in the Carrying Value of Hedged Items	0	2
Currently Designated \| Deposits
Fair Value, Option, Quantitative Disclosures [Line Items]
Cumulative Fair Value Hedging Adjustment Included in the Carrying Value of Hedged Items	0	1
No Longer Designated \| Long-term borrowings
Fair Value, Option, Quantitative Disclosures [Line Items]
Cumulative Fair Value Hedging Adjustment Included in the Carrying Value of Hedged Items	0	0
No Longer Designated \| Deposits
Fair Value, Option, Quantitative Disclosures [Line Items]
Cumulative Fair Value Hedging Adjustment Included in the Carrying Value of Hedged Items	$ 0	$ 0

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.

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Amount of liability hedged in fair value hedging relationship.

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Amount of cumulative increase (decrease) in fair value of hedged liability in fair value hedge, attributable to hedged risk. Excludes cumulative basis adjustment related to foreign exchange risk.

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