Commitments, Contingencies, Guarantees and Others - Litigation (Details) - USD ($) $ in Millions |
Jul. 30, 2025 |
Mar. 31, 2026 |
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| Loss Contingencies [Line Items] | ||
| Loss contingency, estimate of possible loss | $ 300 | |
| Discover Card Product Misclassification | ||
| Loss Contingencies [Line Items] | ||
| Gain (loss) from Litigation Settlement | $ (1,200) | |
| Savings Account and Related Attorney General Litigation | ||
| Loss Contingencies [Line Items] | ||
| Loss contingency accrual | $ 425 |
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- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of loss contingency liability. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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