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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, 2020 | Jul. 31, 2020
--- | --- | ---
Amortized Cost |  |
Due within one year | $ 371 | $ 389
Due within two years | 246 | 256
Due within three years | 187 | 137
Due after three years | 9 | 18
Total available-for-sale debt securities | 813 | 800
Fair Value |  |
Due within one year | 372 | 390
Due within two years | 250 | 261
Due within three years | 188 | 139
Due after three years | 9 | 18
Total available-for-sale debt securities | 819 | 808
Long-term investments | $ 28 | $ 19

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