v3.19.1

Revenue (Additional Information) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 27, 2019 | Apr. 27, 2019 | Jul. 29, 2018 | Jul. 28, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Payment terms |  | 30 days |  |
Accounts receivable, net | $ 3,795 | $ 3,795 | $ 5,450 | $ 5,554
Total deferred revenue | 17,456 | 17,456 |  | 19,685
Revenue recognized | 2,000 | 8,000 |  |
Remaining performance obligation | 23,000 | 23,000 |  |
Total deferred sales commissions | 705 | 705 |  | 644
Amortization of sales commissions, expense | 124 | 349 |  |
Unbilled Contract Revenue |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Remaining performance obligation | 5,500 | 5,500 |  |
Accounting Standards Update 2014-09 |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Accounts receivable, net |  |  | (104) |
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Total deferred revenue | 2,800 | 2,800 | $ 2,800 |
Software and Service Agreements |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Total contract assets | $ 637 | $ 637 |  | $ 122

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