Long-Term Obligations and Commitments - Other Long-Term Obligations (Details) - USD ($) $ in Millions	Apr. 30, 2021	Jul. 31, 2020
Debt Disclosure [Abstract]
Long-term income tax liabilities	$ 28	$ 10
Total dividend payable	16	12
Long-term deferred revenue	7	13
Other	16	17
Total long-term obligations	67	52
Less current portion (included in other current liabilities)	(11)	(10)
Long-term obligations due after one year	56	$ 42
Non-cancellable contractual commitments	$ 318

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Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due beyond one year or the operating cycle, whichever is longer. Alternate captions include income taxes payable, noncurrent.

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Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

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Amount of the recorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

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