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Benefit Plans (Details) - USD ($) $ in Millions | 12 Months Ended
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Jul. 31, 2021 | Jul. 31, 2020 | Jul. 31, 2019
Defined Contribution Plan Disclosure [Line Items] |  |  |
Maximum percent of salary and bonus eligible for executive deferred compensation plan | 75.00% |  |
Executive deferred compensation plan liabilities | $ 153 | $ 123 |
Maximum percent of pre tax salary eligible for contribution to employee plan | 50.00% |  |
Additional employer contribution for next six percent of salary (in percent) | 125.00% |  |
Additional salary contributed by the employee (in percent) | 6.00% |  |
Matching contributions | $ 80 | $ 69 | $ 59
Credit Karma |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Defined contribution plan, maximum annual contributions per employee, percent | 90.00% |  |
Defined contribution plan, employer matching contribution, percent of match | 100.00% |  |
Defined contribution plan, employer matching contribution, percent of employees' gross pay | 6.00% |  |

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- Definition Matching contributions. + References No definition available. + Details
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- Details
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