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Income Before Taxes by Fiscal Year (Detail) - USD ($) $ in Millions | 12 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
Income Tax Disclosure [Abstract] |  |  |  |
U.S. | $ 5,839 |  | $ 7,214 | $ 6,140
Non-U.S. | 2,173 |  | 1,781 | 1,584
Income before income taxes | $ 8,012 | [1] | $ 8,995 | $ 7,724
[1] | The Company did not include Visa Europe's financial results in the Company's consolidated statements of operations from the acquisition date, June 21, 2016, through June 30, 2016 as the impact was immaterial. The Company's consolidated statement of operations for the year ended September 30, 2016 includes Visa Europe's financial results for the three months ended September 30, 2016. See Note 2—Acquisition of Visa Europe.

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- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The sum of operating profit and nonoperating income (expense) before income taxes and minority interest. + References No definition available. + Details
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