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Fair Value Measurements (Tables)
 6 Months Ended
Jan. 31, 2025
Fair Value Disclosures [Abstract]  
Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis
The following table summarizes financial assets and financial liabilities that we measured at fair value on a recurring basis at the dates indicated, classified in accordance with the fair value hierarchy described above.
January 31, 2025July 31, 2024
(In millions)Level 1Level 2Total
Fair Value		Level 1Level 2Total
Fair Value
Assets:      
Cash equivalents, primarily money market funds
$1,193 $— $1,193 $2,538 $— $2,538 
Available-for-sale debt securities:      
Corporate notes— 159 159 — 456 456 
U.S. agency securities— 15 15 — 159 159 
Total available-for-sale debt securities— 174 174 — 615 615 
Total assets measured at fair value on a recurring basis$1,193 $174 $1,367 $2,538 $615 $3,153 
Schedule of Cash Equivalents and Available-for-sale Debt and Equity Securities
The following table summarizes our cash equivalents and available-for-sale debt securities by balance sheet classification and level in the fair value hierarchy at the dates indicated.
January 31, 2025July 31, 2024
(In millions)Level 1Level 2Total
Fair Value		Level 1Level 2Total
Fair Value
Cash equivalents:      
In cash and cash equivalents$1,171 $— $1,171 $2,538 $— $2,538 
In funds receivable and amounts held for customers22 — 22 — — — 
Total cash equivalents$1,193 $— $1,193 $2,538 $— $2,538 
Available-for-sale debt securities:      
In investments$— $24 $24 $— $465 $465 
In funds receivable and amounts held for customers— 150 150 — 150 150 
Total available-for-sale debt securities$— $174 $174 $— $615 $615