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Business Combinations - Pro Forma (Details) - Credit Karma - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 30, 2021 | Apr. 30, 2020 | Apr. 30, 2021 | Apr. 30, 2020
Business Acquisition, Pro Forma Information [Abstract] |  |  |  |
Total revenue | $ 4,173 | $ 3,242 | $ 7,315 | $ 6,623
Net income | $ 1,476 | $ 949 | $ 1,581 | $ 1,027
Basic net income per share (dollars per share) | $ 5.41 | $ 3.49 | $ 5.77 | $ 3.78
Diluted net income per share (dollars per share) | $ 5.35 | $ 3.46 | $ 5.71 | $ 3.73

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