v3.21.2
Stockholders' Equity - Additional Information (Detail)
$ / shares in Units, $ in Billions
1 Months Ended 12 Months Ended
Sep. 30, 2021
USD ($)
Sep. 30, 2020
Sep. 30, 2020
shares
Sep. 30, 2021
USD ($)
preferredStockSeries
$ / shares
shares
Sep. 30, 2020
USD ($)
$ / shares
Sep. 30, 2019
USD ($)
$ / shares
Oct. 22, 2021
$ / shares
Jan. 31, 2021
USD ($)
Jan. 31, 2020
USD ($)
Class of Stock [Line Items]                  
Stock repurchase program, authorized amount | $               $ 8.0 $ 9.5
Stock repurchase plan, remaining authorized funds | $ $ 4.8     $ 4.8          
Dividends, paid | $       $ 2.8 $ 2.7 $ 2.3      
Dividends declared, quarterly, per share (in dollars per share) | $ / shares       $ 0.32 $ 0.30 $ 0.25      
Dividends paid, quarterly, per share (in dollars per share) | $ / shares       $ 0.32 $ 0.30 $ 0.25      
Number of series of preferred stock acquired | preferredStockSeries       3          
Subsequent Event                  
Class of Stock [Line Items]                  
Dividends declared, quarterly, per share amount (in dollars per share) | $ / shares             $ 0.375    
Series A convertible participating preferred stock                  
Class of Stock [Line Items]                  
Issuance of series A preferred stock (in shares) | shares     374,819            
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       141,000,000