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Business Combinations - Pro Forma Financial Information (Details) - Credit Karma - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
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Jul. 31, 2021 | Jul. 31, 2020
Business Acquisition [Line Items] |  |
Total revenue | $ 9,876 | $ 8,549
Net income | $ 1,977 | $ 1,319
Basic net income per share (in dollars per share) | $ 7.21 | $ 4.85
Diluted net income per share (in dollars per share) | $ 7.11 | $ 4.80

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- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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