v3.26.1
Fair Value Measurements - Schedule of financial assets and liabilities measured at fair value (Details) - USD ($)
$ in Millions
Jul. 31, 2026
Jul. 31, 2025
Assets:    
Cash equivalents, primarily money market funds $ 3,068 $ 1,790
Total available-for-sale debt securities 2,645 1,818
Total assets measured at fair value on a recurring basis 5,713 3,608
Corporate notes    
Assets:    
Total available-for-sale debt securities 869 502
U.S. agency securities    
Assets:    
Total available-for-sale debt securities 1,776 1,316
Level 1    
Assets:    
Cash equivalents, primarily money market funds 3,068 1,790
Total available-for-sale debt securities 0 0
Total assets measured at fair value on a recurring basis 3,068 1,790
Level 1 | Corporate notes    
Assets:    
Total available-for-sale debt securities 0 0
Level 1 | U.S. agency securities    
Assets:    
Total available-for-sale debt securities 0 0
Level 2    
Assets:    
Cash equivalents, primarily money market funds 0 0
Total available-for-sale debt securities 2,645 1,818
Total assets measured at fair value on a recurring basis 2,645 1,818
Level 2 | Corporate notes    
Assets:    
Total available-for-sale debt securities 869 502
Level 2 | U.S. agency securities    
Assets:    
Total available-for-sale debt securities $ 1,776 $ 1,316