Finance Receivables - Schedule of Finance Charges and Fees Reversed on Credit Cards (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Credit Cards \| Nonperforming Financial Instruments
Financing Receivable, Modified [Line Items]
Net accrued finance charges and fees reversed	$ 21	$ 17	$ 67	$ 51

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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