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Cover Page - USD ($)
$ in Billions
 12 Months Ended
Sep. 30, 2025
Oct. 30, 2025
Mar. 31, 2025
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Sep. 30, 2025    
Current Fiscal Year End Date --09-30    
Document Transition Report false    
Entity File Number 001-33977    
Entity Registrant Name VISA INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 26-0267673    
Entity Address, Address Line One P.O. Box 8999    
Entity Address, City or Town San Francisco,    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 94128-8999    
City Area Code 650    
Local Phone Number 432-3200    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 601.1
Documents Incorporated by Reference
Portions of the Registrant’s Proxy Statement for the 2026 Annual Meeting of Shareholders are incorporated herein by reference in Part III of this Annual Report on Form 10-K to the extent stated herein. Such Proxy Statement will be filed with the Securities and Exchange Commission within 120 days of the Registrant’s fiscal year ended September 30, 2025.
    
Entity Central Index Key 0001403161    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Amendment Flag false    
Class A common stock      
Document Information [Line Items]      
Title of 12(b) Security Class A Common Stock, par value $0.0001 per share    
Trading Symbol V    
Security Exchange Name NYSE    
Entity Common Stock, Shares Outstanding   1,687,629,770  
2026 Notes      
Document Information [Line Items]      
Title of 12(b) Security 1.500% Senior Notes due 2026    
Trading Symbol V26    
Security Exchange Name NYSE    
2028 Notes      
Document Information [Line Items]      
Title of 12(b) Security 2.250% Senior Notes due 2028    
Trading Symbol V28    
Security Exchange Name NYSE    
2029 Notes      
Document Information [Line Items]      
Title of 12(b) Security 2.000% Senior Notes due 2029    
Trading Symbol V29    
Security Exchange Name NYSE    
2033 Notes      
Document Information [Line Items]      
Title of 12(b) Security 3.125% Senior Notes due 2033    
Trading Symbol V33    
Security Exchange Name NYSE    
2034 Notes      
Document Information [Line Items]      
Title of 12(b) Security 2.375% Senior Notes due 2034    
Trading Symbol V34    
Security Exchange Name NYSE    
2037 Notes      
Document Information [Line Items]      
Title of 12(b) Security 3.500% Senior Notes due 2037    
Trading Symbol V37    
Security Exchange Name NYSE    
2044 Notes      
Document Information [Line Items]      
Title of 12(b) Security 3.875% Senior Notes due 2044    
Trading Symbol V44    
Security Exchange Name NYSE    
Class B-1 common stock      
Document Information [Line Items]      
Title of 12(g) Security Class B-1 common stock, par value $0.0001 per share    
Entity Common Stock, Shares Outstanding   4,835,384  
Class B-2 common stock      
Document Information [Line Items]      
Title of 12(g) Security Class B-2 common stock, par value $0.0001 per share    
Entity Common Stock, Shares Outstanding   120,338,948  
Class C common stock      
Document Information [Line Items]      
Title of 12(g) Security Class C common stock, par value $0.0001 per share    
Entity Common Stock, Shares Outstanding   8,938,707