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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
Oct. 31, 2025
Jul. 31, 2025
Oct. 31, 2024
Jul. 31, 2024
Cash and Cash Equivalents Items [Line Items]        
Funds receivable and funds held for customers not measured or recorded at fair value $ 331 $ 329    
Total cash, cash equivalents, restricted cash, and restricted cash equivalents, amortized cost 6,943 9,481 $ 8,034 $ 7,099
Available-for-sale debt securities:        
Available-for-sale debt securities, amortized cost 338 1,817    
Available-for-sale debt securities, fair value 340 1,818    
Total cash, cash equivalents, restricted cash, restricted cash equivalents, and investments, amortized cost 7,281 11,298    
Total cash, cash equivalents, restricted cash, restricted cash equivalents, and investments, fair value 7,283 11,299    
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 6,943 9,481    
Total cash, cash equivalents, restricted cash, and restricted cash equivalents, fair value 6,943 9,481    
Corporate notes        
Available-for-sale debt securities:        
Available-for-sale debt securities, amortized cost 333 502    
Available-for-sale debt securities, fair value 335 502    
U.S. agency securities        
Available-for-sale debt securities:        
Available-for-sale debt securities, amortized cost 5 1,315    
Available-for-sale debt securities, fair value $ 5 $ 1,316