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Long-Term Obligations and Commitments - Other Long-Term Obligations (Details) - USD ($)
$ in Millions
Oct. 31, 2020
Jul. 31, 2020
Debt Disclosure [Abstract]    
Long-term income tax liabilities $ 23 $ 10
Total dividend payable 11 12
Long-term deferred revenue 9 13
Other 13 19
Total long-term obligations 56 54
Less current portion (included in other current liabilities) (6) (10)
Long-term obligations due after one year $ 50 $ 44