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Cash and Cash Equivalents, Investments, and Funds Held for Customers - Classified by the Stated Maturity Date (Details) - USD ($)
$ in Millions
Apr. 30, 2022
Jul. 31, 2021
Amortized Cost    
Due within one year $ 220 $ 551
Due within two years 311 550
Due within three years 51 398
Due after three years 1 5
Total available-for-sale debt securities 583 1,504
Fair Value    
Due within one year 218 553
Due within two years 305 551
Due within three years 49 398
Due after three years 1 6
Total available-for-sale debt securities $ 573 $ 1,508