Subsequent Events	12 Months Ended
Sep. 30, 2015
Subsequent Events [Abstract]
Subsequent Events	Note 21—Subsequent Events On November 2, 2015, the Company and Visa Europe entered into a transaction agreement, pursuant to which the Company and Visa Europe agreed on the terms and conditions of the Company’s acquisition of 100% of the share capital of Visa Europe. See Note 2—Visa Europe. In October 2015 , the Company's board of directors authorized a new $5.0 billion share repurchase program. See Note 14—Stockholders' Equity. In October 2015, the Company’s board of directors declared a dividend in the aggregate amount of $0.14 per share of class A common stock (determined in the case of class B and class C common stock on an as-converted basis). See Note 14—Stockholders' Equity.

Subsequent Events

12 Months Ended

Sep. 30, 2015

Note 21—Subsequent Events

On November 2, 2015, the Company and Visa Europe entered into a transaction agreement, pursuant to which the Company and Visa Europe agreed on the terms and conditions of the Company’s acquisition of 100% of the share capital of Visa Europe. See Note 2—Visa Europe.

In October 2015 , the Company's board of directors authorized a new $5.0 billion share repurchase program. See Note 14—Stockholders' Equity.

In October 2015, the Company’s board of directors declared a dividend in the aggregate amount of $0.14 per share of class A common stock (determined in the case of class B and class C common stock on an as-converted basis). See Note 14—Stockholders' Equity.