Intangible Assets and Goodwill - Schedule of Indefinite-Lived and Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions |
Sep. 30, 2025 |
Sep. 30, 2024 |
|---|---|---|
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross | $ 476 | $ 725 |
| Accumulated Amortization | (245) | (477) |
| Net | 231 | 248 |
| Indefinite-lived Intangible Assets [Line Items] | ||
| Indefinite-lived Intangible Assets | 27,415 | 26,641 |
| Intangible Assets, Net (Excluding Goodwill) [Abstract] | ||
| Gross | 27,891 | 27,366 |
| Net | 27,646 | 26,889 |
| Customer relationships and reacquired rights | ||
| Indefinite-lived Intangible Assets [Line Items] | ||
| Indefinite-lived Intangible Assets | 23,331 | 22,557 |
| Visa trade name | ||
| Indefinite-lived Intangible Assets [Line Items] | ||
| Indefinite-lived Intangible Assets | 4,084 | 4,084 |
| Customer relationships | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross | 476 | 535 |
| Accumulated Amortization | (245) | (298) |
| Net | 231 | 237 |
| Trade names | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross | 0 | 190 |
| Accumulated Amortization | 0 | (179) |
| Net | $ 0 | $ 11 |
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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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/exampleRef
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. 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/exampleRef
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- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount before accumulated amortization of intangible assets, excluding goodwill. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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