DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES - Schedule of Fair Value of Our Derivative Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional	$ 124,863	$ 123,720
Fair Value of Assets	1,264	1,528
Fair Value of Liabilities	1,870	947
Derivative, collateral, obligation to return cash	50	5
Derivative, collateral, right to reclaim cash	139	102
Derivative asset, not offset, policy election deduction	778	610
Derivative liability, not offset, policy election deduction	778	610
Level 2 \| Fair Value, Recurring
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Assets	1,264	1,528
Fair Value of Liabilities	1,870	947
Interest rate contracts \| Derivatives not designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional	86,290	87,293
Interest rate contracts \| Derivatives not designated as hedging instruments \| Level 2 \| Fair Value, Recurring
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Assets	826	364
Fair Value of Liabilities	704	619
Interest rate contracts \| Fair value hedges \| Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional	22,167	18,582
Interest rate contracts \| Fair value hedges \| Designated as Hedging Instrument \| Level 2 \| Fair Value, Recurring
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Assets	6	374
Fair Value of Liabilities	879	220
Interest rate contracts \| Cross-currency interest rate swap contracts \| Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional	6,330	4,158
Interest rate contracts \| Cross-currency interest rate swap contracts \| Designated as Hedging Instrument \| Level 2 \| Fair Value, Recurring
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Assets	166	383
Fair Value of Liabilities	217	5
Foreign currency exchange contracts \| Derivatives not designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional	3,819	6,566
Foreign currency exchange contracts \| Derivatives not designated as hedging instruments \| Affiliated Entity
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional	0	3,500
Foreign currency exchange contracts \| Derivatives not designated as hedging instruments \| Level 2 \| Fair Value, Recurring
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Assets	75	28
Fair Value of Liabilities	0	75
Foreign currency exchange contracts \| Derivatives not designated as hedging instruments \| Level 2 \| Fair Value, Recurring \| Affiliated Entity
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Assets	0	24
Fair Value of Liabilities	0	24
Cross-currency interest rate swap contracts \| Derivatives not designated as hedging instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional	6,257	7,121
Cross-currency interest rate swap contracts \| Derivatives not designated as hedging instruments \| Level 2 \| Fair Value, Recurring
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value of Assets	191	379
Fair Value of Liabilities	$ 70	$ 28

Fair value of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and contract can be net settled by means outside contract or delivery of asset, subject to master netting arrangement or similar agreement and not elected or qualified to offset, deducted from derivative asset.

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