FAIR VALUES OF FINANCIAL INSTRUMENTS - Schedule of Financial Instruments Disclosed but Not Carried at Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Financial assets
Credit card and other loans, net	$ 18,466	$ 18,747
Total	18,466	18,747
Financial liabilities
Deposits	15,480	13,928
Debt issued by consolidated VIEs	2,322	3,442
Long-term and other debt	827	931
Total	18,629	18,301
Level 1
Financial assets
Credit card and other loans, net	0	0
Total	0	0
Financial liabilities
Deposits	0	0
Debt issued by consolidated VIEs	0	0
Long-term and other debt	0	0
Total	0	0
Level 2
Financial assets
Credit card and other loans, net	0	0
Total	0	0
Financial liabilities
Deposits	15,480	13,928
Debt issued by consolidated VIEs	2,322	3,442
Long-term and other debt	827	931
Total	18,629	18,301
Level 3
Financial assets
Credit card and other loans, net	18,466	18,747
Total	18,466	18,747
Financial liabilities
Deposits	0	0
Debt issued by consolidated VIEs	0	0
Long-term and other debt	0	0
Total	$ 0	$ 0

Financial Assets Without Readily Determinable Fair Value, Amount

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Financial Liabilities Without Readily Determinable Fair Value, Amount

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Financing Receivable, after Allowance for Credit Loss, Fair Value Disclosure

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents non-recourse borrowings of consolidated securitization entities.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

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