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Cash and Cash Equivalents, Investments, and Funds Receivable and Amounts Held for Customers - Schedule of Investment Category Type of Issue (Details) - USD ($)
$ in Millions
Apr. 30, 2025
Jul. 31, 2024
Apr. 30, 2024
Jul. 31, 2023
Cash and Cash Equivalents Items [Line Items]        
Funds receivable and funds held for customers not measured or recorded at fair value $ 330 $ 281    
Total cash, cash equivalents, restricted cash, and restricted cash equivalents, amortized cost 10,184 7,099 $ 6,481 $ 2,852
Available-for-sale debt securities:        
Available-for-sale debt securities, amortized cost 880 615    
Available-for-sale debt securities, fair value 881 615    
Total cash, cash equivalents, restricted cash, restricted cash equivalents, and investments, amortized cost 11,064 7,714    
Total cash, cash equivalents, restricted cash, restricted cash equivalents, and investments, fair value 11,065 7,714    
Total cash, cash equivalents, restricted cash, and restricted cash equivalents        
Cash and Cash Equivalents Items [Line Items]        
Total cash, cash equivalents, restricted cash, and restricted cash equivalents, amortized cost 10,184 7,099    
Total cash, cash equivalents, restricted cash, and restricted cash equivalents, fair value 10,184 7,099    
Corporate notes        
Available-for-sale debt securities:        
Available-for-sale debt securities, amortized cost 528 456    
Available-for-sale debt securities, fair value 529 456    
U.S. agency securities        
Available-for-sale debt securities:        
Available-for-sale debt securities, amortized cost 352 159    
Available-for-sale debt securities, fair value $ 352 $ 159