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Benefit Plans (Details) - USD ($)
$ in Millions
12 Months Ended
Jul. 31, 2023
Jul. 31, 2022
Jul. 31, 2021
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 $ 171 $ 147  
Defined contribution plan, cost $ 136 $ 118 $ 80
Credit Karma 401 (k) Plan      
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%    
Intuit Inc. 401(k) Plan      
Defined Contribution Plan Disclosure [Line Items]      
Defined contribution plan, maximum annual contributions per employee, percent 50.00%    
Defined contribution plan, employer matching contribution, percent of match 125.00%    
Defined contribution plan, employer matching contribution, percent of employees' gross pay 6.00%    
Credit Karma      
Defined Contribution Plan Disclosure [Line Items]      
Defined contribution plan, employer matching contribution, percent of employees' gross pay 6.00%