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Summary of Significant Accounting Policies - Additional Information (Detail) |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 19, 2015 | Feb. 01, 2015 USD ($) | Sep. 30, 2016 USD ($) | Jun. 21, 2016
Significant Accounting Policies [Line Items] |  |  |  |
Number of Countries in which Entity Operates (more than) |  |  | 200 |
Number of Reportable Segments |  |  | 1 |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  | $ 0 |
Goodwill, Impairment Loss |  | $ 0 |  |
Minimum |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Acquired long-lived intangible assets useful life |  |  | 3 years |
Maximum |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Acquired long-lived intangible assets useful life |  |  | 15 years |
Furniture and Fixtures | Minimum |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful life |  |  | 2 years |
Furniture and Fixtures | Maximum |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful life |  |  | 10 years |
Building Improvements | Minimum |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful life |  |  | 3 years |
Building Improvements | Maximum |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful life |  |  | 40 years |
Building |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful life |  |  | 40 years |
Class A common stock |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Common stock split, conversion ratio | 4 |  |  |
U.S. Pension Plans |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Expected average employee future service period for United States plans (in years) |  |  | 9 years |
Non-U.S. Pension Plans |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Expected average employee future service period for United States plans (in years) |  |  | 12 years |
Visa Europe |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |
Share capital of Visa Europe acquired (percent) |  |  |  | 100.00%

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