v3.19.1

Recent Accounting Pronouncements (Additional Information) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 27, 2019 | Apr. 28, 2018 | Apr. 27, 2019 | Apr. 28, 2018 | Jul. 29, 2018 | Jul. 28, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Revenue, total | $ 12,958 | $ 12,463 | $ 38,476 | $ 36,486 |  |
Benefit for provision for income taxes | (571) | $ (562) | (1,452) | $ (13,140) |  |
Increase in retained earnings | (2,877) |  | (2,877) |  | $ 5,130 | $ 1,233
Total contract assets noncurrent | 383 |  | 383 |  |  |
Total capitalized contract acquisition costs | 705 |  | 705 |  |  | 644
Capitalized contract acquisition costs, current | 390 |  | 390 |  |  |
Capitalized contract acquisition costs, noncurrent | 315 |  | 315 |  |  |
Accounting Standards Update 2014-09 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Increase in retained earnings |  |  |  |  | 2,333 |
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Revenue, total | 146 |  | 662 |  |  |
Benefit for provision for income taxes | 152 |  | 152 |  |  |
Increase in retained earnings |  |  |  |  | $ 2,300 |
Software and Service Agreements |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Total contract assets | 637 |  | 637 |  |  | $ 122
Total contract assets, current | $ 254 |  | $ 254 |  |  |

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