v3.26.1
Fair Value Measurements - Schedule of cash equivalents and available-for-sale debt securities by balance sheet classification (Details) - USD ($)
$ in Millions
Jul. 31, 2026
Jul. 31, 2025
Fair Value Asset Measured on Recurring Basis [Line Items]    
Cash equivalents, primarily money market funds $ 4,705 $ 2,884
Total available-for-sale debt securities 2,645 1,818
Location, Statement of Financial Position, Balance [Axis]: us-gaap:CashAndCashEquivalentsAtCarryingValue    
Fair Value Asset Measured on Recurring Basis [Line Items]    
Cash equivalents, primarily money market funds 3,068 1,790
Location, Statement of Financial Position, Balance [Axis]: us-gaap:DebtSecuritiesAvailableForSaleExcludingAccruedInterestCurrent    
Fair Value Asset Measured on Recurring Basis [Line Items]    
Total available-for-sale debt securities 2,495 1,668
Location, Statement of Financial Position, Balance [Axis]: intu:FundsReceivableAndAmountsHeldForCustomers    
Fair Value Asset Measured on Recurring Basis [Line Items]    
Total available-for-sale debt securities 150 150
Level 1    
Fair Value Asset Measured on Recurring Basis [Line Items]    
Total available-for-sale debt securities 0 0
Level 1 | Location, Statement of Financial Position, Balance [Axis]: us-gaap:CashAndCashEquivalentsAtCarryingValue    
Fair Value Asset Measured on Recurring Basis [Line Items]    
Cash equivalents, primarily money market funds 3,068 1,790
Level 1 | Location, Statement of Financial Position, Balance [Axis]: us-gaap:DebtSecuritiesAvailableForSaleExcludingAccruedInterestCurrent    
Fair Value Asset Measured on Recurring Basis [Line Items]    
Total available-for-sale debt securities 0 0
Level 1 | Location, Statement of Financial Position, Balance [Axis]: intu:FundsReceivableAndAmountsHeldForCustomers    
Fair Value Asset Measured on Recurring Basis [Line Items]    
Total available-for-sale debt securities 0 0
Level 2    
Fair Value Asset Measured on Recurring Basis [Line Items]    
Total available-for-sale debt securities 2,645 1,818
Level 2 | Location, Statement of Financial Position, Balance [Axis]: us-gaap:CashAndCashEquivalentsAtCarryingValue    
Fair Value Asset Measured on Recurring Basis [Line Items]    
Cash equivalents, primarily money market funds 0 0
Level 2 | Location, Statement of Financial Position, Balance [Axis]: us-gaap:DebtSecuritiesAvailableForSaleExcludingAccruedInterestCurrent    
Fair Value Asset Measured on Recurring Basis [Line Items]    
Total available-for-sale debt securities 2,495 1,668
Level 2 | Location, Statement of Financial Position, Balance [Axis]: intu:FundsReceivableAndAmountsHeldForCustomers    
Fair Value Asset Measured on Recurring Basis [Line Items]    
Total available-for-sale debt securities $ 150 $ 150