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Cash and Cash Equivalents, Investments, and Funds Held for Customers - Classified by the stated maturity date (Details) - USD ($) $ in Millions | Oct. 31, 2021 | Jul. 31, 2021
--- | --- | ---
Amortized Cost |  |
Due within one year | $ 154 | $ 551
Due within two years | 300 | 550
Due within three years | 132 | 398
Due after three years | 0 | 5
Total available-for-sale debt securities | 586 | 1,504
Fair Value |  |
Due within one year | 154 | 553
Due within two years | 299 | 551
Due within three years | 131 | 398
Due after three years | 0 | 6
Total available-for-sale debt securities | $ 584 | $ 1,508

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