Loans - Credit Card Loan Portfolio, Financial Effects of FDMs (Details) - Credit card - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Modified [Line Items]
Fixed payment plan period	60 months
Amortized cost basis	$ 2,084	$ 926	$ 648
Term extension and interest rate reduction
Financing Receivable, Modified [Line Items]
Amortized cost basis	$ 1,800	$ 926	$ 648
% of loan modifications to total retained credit card loans	0.73%	0.40%	0.31%
Weighted average contractual interest rate before modification	22.88%	23.64%	23.19%
Weighted average contractual interest rate after modification	3.48%	3.20%	3.64%
Other
Financing Receivable, Modified [Line Items]
Amortized cost basis	$ 284
% of loan modifications to total retained credit card loans	0.11%
Weighted average contractual interest rate before modification	22.75%
Weighted average contractual interest rate after modification	8.09%

Financing Receivable, Modified, Weighted-Average Interest Rate After Modification, During Period

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- Definition

Financing Receivable, Modified, Weighted-Average Interest Rate Before Modification, During Period

+ References

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- Definition

The duration period for placing customers on a fixed payment plan as a result of a credit card loan modification program.

+ References

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- Definition

Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty.

+ References

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- Definition

Percentage, excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables.

+ References

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- Definition

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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