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Stockholders' Equity - Additional Information (Detail) $ / shares in Units, $ in Billions |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 29, 2022 shares | Sep. 30, 2022 USD ($) preferredStockSeries shares | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Oct. 31, 2022 USD ($) | Oct. 21, 2022 $ / shares | Dec. 31, 2021 USD ($) | Jan. 31, 2021 USD ($)
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  |  | $ 12.0 | $ 8.0
Stock repurchase plan, remaining authorized funds |  | $ 5.2 |  |  |  |  |  |
Dividends, paid |  | $ 3.2 | $ 2.8 | $ 2.7 |  |  |  |
Number of series of preferred stock acquired | preferredStockSeries |  | 3 |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  | $ 12.0 |  |  |
Dividends declared, quarterly, per share amount (in dollars per share) | $ / shares |  |  |  |  |  | $ 0.45 |  |
Series A convertible participating preferred stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Issuance of stock (in shares) | shares | 176,655 |  |  |  |  |  |  |
Preferred stock, conversion rate |  | 100.0000 | 100.0000 |  |  |  |  |
Visa Europe | Class A equivalent preferred stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred stock, conversion rate |  | 100 |  |  |  |  |  |
Share Repurchase Program Aggregate | Class C common stock |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Shares of class C common stock released from transfer restrictions, converted to class A common stock (in shares) | shares |  | 142,000,000 |  |  |  |  |  |

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