DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES - Schedule of Gains/(Losses) by Hedge Designation (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivatives not designated as hedging instruments	$ (119)	$ (647)	$ (521)
Interest rate contracts \| Derivatives not designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivatives not designated as hedging instruments	(48)	(85)	37
Interest rate contracts \| Fair value hedges \| Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net interest settlements and accruals on hedging instruments	(162)	(361)	(507)
Fair value changes on hedging instruments	548	(220)	196
Fair value changes on hedged debt	(530)	182	(260)
Interest rate contracts \| Cross-currency interest rate swap contracts \| Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net interest settlements and accruals on hedging instruments	(79)	(133)	(79)
Fair value changes on hedging instruments	474	(134)	96
Fair value changes on hedged debt	(463)	108	(96)
Foreign currency exchange contracts \| Derivatives not designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivatives not designated as hedging instruments	(135)	268	(35)
Cross-currency interest rate swap contracts \| Derivatives not designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivatives not designated as hedging instruments	$ 276	$ (272)	$ 127

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.

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Loss relating to components of the gain (loss) on the fair value hedging instrument excluded from the assessment of fair value hedge effectiveness. Recognized in earnings.

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