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Basic and Diluted Earnings Per Share (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]        
Net loss attributable to Visa Inc. $ 1,225 [1],[2] $ (1,839) [1],[2] $ 3,788 [1],[2] $ 482 [1],[2]
Class A common stock
        
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]        
Income Allocation (A) 973 [1],[2] (1,437) [1],[2] 3,014 [1],[2] 372 [1],[2]
Weighted- Average Shares Outstanding (B) 515 [1] 525 [1] 524 [1] 523 [1]
Earnings per Share (A)/(B) $ 1.89 [1] $ (2.74) [1] $ 5.76 [1] $ 0.71 [1]
Income Allocation (A) 1,225 [1],[2] (1,839) [1],[2] 3,788 [1],[2] 482 [1],[2]
Weighted- Average Shares Outstanding (B) 651 [1],[3] 672 [1],[3] 660 [1],[3] 681 [1],[3]
Earnings per Share (A)/(B) $ 1.88 [1] $ (2.74) [1] $ 5.74 [1] $ 0.71 [1]
Class B common stock
        
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]        
Income Allocation (A) 194 [1],[2] (286) [1],[2] 594 [1],[2] 78 [1],[2]
Weighted- Average Shares Outstanding (B) 245 [1] 245 [1] 245 [1] 245 [1]
Earnings per Share (A)/(B) $ 0.79 [1] $ (1.16) [1] $ 2.42 [1] $ 0.32 [1]
Income Allocation (A) 194 [1],[2] (286) [1],[2] 592 [1],[2] 78 [1],[2]
Weighted- Average Shares Outstanding (B) 245 [1] 245 [1] 245 [1] 245 [1]
Earnings per Share (A)/(B) $ 0.79 [1] $ (1.16) [1] $ 2.41 [1] $ 0.32 [1]
Class C common stock
        
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]        
Income Allocation (A) 53 [1],[2] (109) [1],[2] 166 [1],[2] 30 [1],[2]
Weighted- Average Shares Outstanding (B) 28 [1] 40 [1] 29 [1] 43 [1]
Earnings per Share (A)/(B) $ 1.89 [1] $ (2.74) [1] $ 5.76 [1] $ 0.71 [1]
Income Allocation (A) 53 [1],[2] (109) [1],[2] 165 [1],[2] 30 [1],[2]
Weighted- Average Shares Outstanding (B) 28 [1] 40 [1] 29 [1] 43 [1]
Earnings per Share (A)/(B) $ 1.88 [1] $ (2.74) [1] $ 5.74 [1] $ 0.71 [1]
Participating securities
        
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]        
Income Allocation (A) 5 [1],[2],[4] (7) [1],[2],[4] 14 [1],[2],[4] 2 [1],[2],[4]
Income Allocation (A) $ 5 [1],[2],[4] $ (7) [1],[2],[4] $ 14 [1],[2],[4] $ 2 [1],[2],[4]
Stock Options
        
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount   7    
[1] Figures in the table may not recalculate exactly due to rounding. Earnings (loss) per share is calculated based on whole numbers, not the rounded numbers presented.
[2] Net income (loss) attributable to Visa Inc. is allocated based on proportional ownership on an as-converted basis. The weighted-average numbers of shares of as-converted class B common stock used in the income (loss) allocation were 103 million for the three and nine months ended June 30, 2013, and 104 million and 110 million for the three and nine months ended June 30, 2012, respectively.
[3] Weighted-average diluted shares outstanding are calculated on an as-converted basis, and include incremental common stock equivalents, as calculated under the treasury stock method. The computation includes 2 million common stock equivalents for the three and nine months ended June 30, 2013, and 3 million for the nine months ended June 30, 2012, because their effect would have been dilutive. The computation excludes less than 1 million common stock equivalents for the three and nine months ended June 30, 2013 and the nine months ended June 30, 2012, because their effect would have been anti-dilutive. The computation also excludes 7 million outstanding stock awards for the three months ended June 30, 2012, because their effect would have been anti-dilutive as the Company had a net loss.
[4] Participating securities are unvested share-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents, such as the Company's restricted stock awards, restricted stock units and earned performance-based shares.