Summary of Significant Accounting Policies	9 Months Ended
Jun. 30, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 1—Summary of Significant Accounting Policies Organization. Visa Inc. (“Visa” or the “Company”) is a global payments technology company that connects consumers, businesses, financial institutions and governments in more than 200 countries and territories to fast, secure and reliable electronic payments. Visa and its wholly-owned consolidated subsidiaries, including Visa U.S.A. Inc. (“Visa U.S.A.”), Visa International Service Association (“Visa International”), Visa Worldwide Pte. Limited, Visa Canada Corporation, Inovant LLC and CyberSource Corporation (“CyberSource”), operate one of the world’s most advanced processing networks — VisaNet — which facilitates authorization, clearing and settlement of payment transactions worldwide. VisaNet also offers fraud protection for account holders and assured payment for merchants. Visa is not a bank and does not issue cards, extend credit or set rates and fees for account holders on Visa-branded cards and payment products. In most cases, account holder and merchant relationships belong to, and are managed by, Visa's financial institution clients. Visa provides a wide variety of payment solutions that support payment products that issuers can offer to their account holders: pay now with debit, pay ahead with prepaid or pay later with credit products. Visa also offers a growing suite of innovative digital, eCommerce and mobile products and services. These services facilitate transactions on Visa's network among account holders, merchants, financial institutions and governments in mature and emerging markets globally. Consolidation and basis of presentation. The accompanying unaudited consolidated financial statements include the accounts of Visa and its consolidated entities and are presented in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The Company consolidates its majority-owned and controlled entities, including variable interest entities ("VIEs") for which the Company is the primary beneficiary. The Company’s investments in VIEs have not been material to its consolidated financial statements as of and for the periods presented. All significant intercompany accounts and transactions are eliminated in consolidation. On March 18, 2015, the Company completed a four-for-one split of its class A common stock effected in the form of a stock dividend. All per share amounts and number of shares outstanding in these unaudited consolidated financial statements and accompanying notes are presented on a post-split basis. See Note 9—Stockholders' Equity. Certain prior period amounts within the accompanying unaudited consolidated financial statements have been reclassified to conform to current period presentation. These reclassifications did not affect the Company's financial position, total operating revenues, net income, comprehensive income, or cash flows as of and for the periods presented. The accompanying unaudited consolidated financial statements are presented in accordance with the U.S. Securities and Exchange Commission ("SEC") requirements for Quarterly Reports on Form 10-Q and, consequently, do not include all of the annual disclosures required by U.S. GAAP. Reference should be made to the Visa Annual Report on Form 10-K for the year ended September 30, 2014 for additional disclosures, including a summary of the Company’s significant accounting policies. In the opinion of management, the accompanying unaudited consolidated financial statements include all normal recurring adjustments necessary for a fair presentation of the Company's financial position, results of operations and cash flows for the interim periods presented. Recently Issued and Adopted Accounting Pronouncements. In February 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2013-04, which provides guidance for the recognition, measurement and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date. The Company adopted the standard effective October 1, 2014. The adoption did not have a material impact on the consolidated financial statements. In March 2013, the FASB issued ASU 2013-05, which clarifies guidance for the release of the cumulative translation adjustment into net income when a parent either sells a part or all of its investment in a foreign entity, or no longer holds a controlling financial interest in a subsidiary or group of assets that is a nonprofit activity or a business within a foreign entity. The Company adopted the standard effective October 1, 2014. The adoption did not have a material impact on the consolidated financial statements. In July 2013, the FASB issued ASU 2013-11, which provides guidance for the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. The standard impacts presentation only. The Company adopted the standard effective October 1, 2014. The adoption did not have a material impact on the consolidated financial statements. In November 2014, the FASB issued ASU 2014-17, which permits an acquired entity to elect the option to apply pushdown accounting in its separate financial statements upon occurrence of an event in which an acquirer obtained control of the acquired entity. The Company adopted the standard prospectively effective November 18, 2014. The adoption did not have a material impact on the consolidated financial statements. In January 2015, the FASB issued ASU 2015-01, which simplifies the classification, presentation and disclosure requirements for extraordinary events and unusual transactions by eliminating the concept of extraordinary items from U.S. GAAP. The Company will adopt the standard effective October 1, 2016. The adoption is not expected to have a material impact on the consolidated financial statements. In February 2015, the FASB issued ASU 2015-02, which amends guidance relating to the assessment for determining when an entity should consolidate variable interest entities and limited partnerships. The Company will adopt the standard effective October 1, 2016. The adoption is not expected to have a material impact on the consolidated financial statements. In April 2015, the FASB issued ASU 2015-03, which simplifies the presentation of debt issuance costs by requiring that debt issuance costs be presented in the balance sheet as a direct deduction from the carrying amount of debt liability, consistent with debt discounts or premiums. The standard impacts presentation only. The Company will adopt the standard effective October 1, 2016. The adoption is not expected to have a material impact on the consolidated financial statements. In April 2015, the FASB issued ASU 2015-05, which provides guidance about a customer’s accounting for fees paid in a cloud computing arrangement. The amendment will help entities evaluate whether such an arrangement includes a software license, which should be accounted for consistent with the acquisition of other software licenses; otherwise, it should be accounted for as a service contract. The Company will adopt the standard effective October 1, 2016. The adoption is not expected to have a material impact on the consolidated financial statements.

Note 1—Summary of Significant Accounting Policies

Organization. Visa Inc. (“Visa” or the “Company”) is a global payments technology company that connects consumers, businesses, financial institutions and governments in more than 200 countries and territories to fast, secure and reliable electronic payments. Visa and its wholly-owned consolidated subsidiaries, including Visa U.S.A. Inc. (“Visa U.S.A.”), Visa International Service Association (“Visa International”), Visa Worldwide Pte. Limited, Visa Canada Corporation, Inovant LLC and CyberSource Corporation (“CyberSource”), operate one of the world’s most advanced processing networks — VisaNet — which facilitates authorization, clearing and settlement of payment transactions worldwide. VisaNet also offers fraud protection for account holders and assured payment for merchants. Visa is not a bank and does not issue cards, extend credit or set rates and fees for account holders on Visa-branded cards and payment products. In most cases, account holder and merchant relationships belong to, and are managed by, Visa's financial institution clients. Visa provides a wide variety of payment solutions that support payment products that issuers can offer to their account holders: pay now with debit, pay ahead with prepaid or pay later with credit products. Visa also offers a growing suite of innovative digital, eCommerce and mobile products and services. These services facilitate transactions on Visa's network among account holders, merchants, financial institutions and governments in mature and emerging markets globally.

Consolidation and basis of presentation. The accompanying unaudited consolidated financial statements include the accounts of Visa and its consolidated entities and are presented in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The Company consolidates its majority-owned and controlled entities, including variable interest entities ("VIEs") for which the Company is the primary beneficiary. The Company’s investments in VIEs have not been material to its consolidated financial statements as of and for the periods presented. All significant intercompany accounts and transactions are eliminated in consolidation.

On March 18, 2015, the Company completed a four-for-one split of its class A common stock effected in the form of a stock dividend. All per share amounts and number of shares outstanding in these unaudited consolidated financial statements and accompanying notes are presented on a post-split basis. See Note 9—Stockholders' Equity.

Certain prior period amounts within the accompanying unaudited consolidated financial statements have been reclassified to conform to current period presentation. These reclassifications did not affect the Company's financial position, total operating revenues, net income, comprehensive income, or cash flows as of and for the periods presented.

The accompanying unaudited consolidated financial statements are presented in accordance with the U.S. Securities and Exchange Commission ("SEC") requirements for Quarterly Reports on Form 10-Q and, consequently, do not include all of the annual disclosures required by U.S. GAAP. Reference should be made to the Visa Annual Report on Form 10-K for the year ended September 30, 2014 for additional disclosures, including a summary of the Company’s significant accounting policies.

In the opinion of management, the accompanying unaudited consolidated financial statements include all normal recurring adjustments necessary for a fair presentation of the Company's financial position, results of operations and cash flows for the interim periods presented.

Recently Issued and Adopted Accounting Pronouncements.

In February 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2013-04, which provides guidance for the recognition, measurement and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date. The Company adopted the standard effective October 1, 2014. The adoption did not have a material impact on the consolidated financial statements.

In March 2013, the FASB issued ASU 2013-05, which clarifies guidance for the release of the cumulative translation adjustment into net income when a parent either sells a part or all of its investment in a foreign entity, or no longer holds a controlling financial interest in a subsidiary or group of assets that is a nonprofit activity or a business within a foreign entity. The Company adopted the standard effective October 1, 2014. The adoption did not have a material impact on the consolidated financial statements.

In July 2013, the FASB issued ASU 2013-11, which provides guidance for the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. The standard impacts presentation only. The Company adopted the standard effective October 1, 2014. The adoption did not have a material impact on the consolidated financial statements.

In November 2014, the FASB issued ASU 2014-17, which permits an acquired entity to elect the option to apply pushdown accounting in its separate financial statements upon occurrence of an event in which an acquirer obtained control of the acquired entity. The Company adopted the standard prospectively effective November 18, 2014. The adoption did not have a material impact on the consolidated financial statements.

In January 2015, the FASB issued ASU 2015-01, which simplifies the classification, presentation and disclosure requirements for extraordinary events and unusual transactions by eliminating the concept of extraordinary items from U.S. GAAP. The Company will adopt the standard effective October 1, 2016. The adoption is not expected to have a material impact on the consolidated financial statements.

In February 2015, the FASB issued ASU 2015-02, which amends guidance relating to the assessment for determining when an entity should consolidate variable interest entities and limited partnerships. The Company will adopt the standard effective October 1, 2016. The adoption is not expected to have a material impact on the consolidated financial statements.

In April 2015, the FASB issued ASU 2015-03, which simplifies the presentation of debt issuance costs by requiring that debt issuance costs be presented in the balance sheet as a direct deduction from the carrying amount of debt liability, consistent with debt discounts or premiums. The standard impacts presentation only. The Company will adopt the standard effective October 1, 2016. The adoption is not expected to have a material impact on the consolidated financial statements.

In April 2015, the FASB issued ASU 2015-05, which provides guidance about a customer’s accounting for fees paid in a cloud computing arrangement. The amendment will help entities evaluate whether such an arrangement includes a software license, which should be accounted for consistent with the acquisition of other software licenses; otherwise, it should be accounted for as a service contract. The Company will adopt the standard effective October 1, 2016. The adoption is not expected to have a material impact on the consolidated financial statements.