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Fair Value Measurements (Tables)
 9 Months Ended
Apr. 30, 2024
Fair Value Disclosures [Abstract]  
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.
April 30, 2024July 31, 2023
(In millions)Level 1Level 2Total
Fair Value		Level 1Level 2Total
Fair Value
Assets:      
Cash equivalents, primarily money market funds
$3,174 $— $3,174 $1,888 $— $1,888 
Available-for-sale debt securities:      
Corporate notes— 470 470 — 805 805 
U.S. agency securities— 143 143 — 209 209 
Total available-for-sale debt securities— 613 613 — 1,014 1,014 
Total assets measured at fair value on a recurring basis$3,174 $613 $3,787 $1,888 $1,014 $2,902 
Liabilities:
Senior unsecured notes (1)
$— $5,286 $5,286 $— $1,309 $1,309 
(1) Carrying values on our condensed consolidated balance sheets at April 30, 2024 and July 31, 2023 were $5.45 billion and $1.49 billion, respectively. See Note 6, “Debt,” for more information.
Cash equivalents and available-for-sale debt and equity securities by balance sheet classification and level in the fair value hierarchy
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.
April 30, 2024July 31, 2023
(In millions)Level 1Level 2Total
Fair Value		Level 1Level 2Total
Fair Value
Cash equivalents:      
In cash and cash equivalents$3,174 $— $3,174 $1,888 $— $1,888 
Available-for-sale debt securities:      
In investments$— $463 $463 $— $814 $814 
In funds receivable and amounts held for customers— 150 150 — 200 200 
Total available-for-sale debt securities$— $613 $613 $— $1,014 $1,014