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Summary of Significant Accounting Policies - Summary of Cumulative Effect of the Changes Made to Consolidated Balance Sheet for the Adoption of New Accounting Standard Updates (Details) - USD ($) $ in Millions | Jul. 27, 2019 | Jul. 29, 2018 | Jul. 28, 2018
--- | --- | --- | ---
ASSETS |  |  |
Accounts receivable, net | $ 5,491 | $ 5,450 | $ 5,554
Inventories | 1,383 | 1,544 | 1,846
Other current assets | 2,373 | 3,286 | 2,940
Deferred tax assets | 4,065 | 3,995 | 3,219
Other assets | 2,496 | 1,954 | 1,582
TOTAL ASSETS | 97,793 | 109,872 | 108,784
LIABILITIES AND EQUITY |  |  |
Income taxes payable | 1,149 | 1,015 | 1,004
Deferred revenue | 10,668 | 9,788 | 11,490
Other current liabilities | 4,424 | 4,446 | 4,413
Deferred revenue | 7,799 | 7,114 | 8,195
Other long-term liabilities | 1,309 | 1,532 | 1,434
(Accumulated deficit) Retained earnings | (5,903) | 5,130 | 1,233
Accumulated other comprehensive income (loss) | (792) | (1,017) | (849)
TOTAL LIABILITIES AND EQUITY | 97,793 | 109,872 | 108,784
Total deferred revenue | 18,467 |  | 19,685
Product |  |  |
LIABILITIES AND EQUITY |  |  |
Total deferred revenue | 6,758 |  | $ 8,254
Accounting Standards Update 2014-09 |  |  |
ASSETS |  |  |
Accounts receivable, net |  | (104) |
Inventories |  | (302) |
Other current assets |  | 371 |
Deferred tax assets |  | (624) |
Other assets |  | 327 |
TOTAL ASSETS |  | (332) |
LIABILITIES AND EQUITY |  |  |
Income taxes payable |  | 0 |
Deferred revenue |  | (1,702) |
Other current liabilities |  | 33 |
Deferred revenue |  | (1,081) |
Other long-term liabilities |  | 85 |
(Accumulated deficit) Retained earnings |  | 2,333 |
Accumulated other comprehensive income (loss) |  | 0 |
TOTAL LIABILITIES AND EQUITY |  | (332) |
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606 |  |  |
LIABILITIES AND EQUITY |  |  |
(Accumulated deficit) Retained earnings |  | 2,300 |
Total deferred revenue | $ 2,800 | 2,800 |
Accounting Standards Update 2014-09 | Product | Difference between Revenue Guidance in Effect before and after Topic 606 |  |  |
LIABILITIES AND EQUITY |  |  |
Total deferred revenue |  | 2,600 |
Accounting Standards Update 2014-09 | Recurring software and subscription offers | Difference between Revenue Guidance in Effect before and after Topic 606 |  |  |
LIABILITIES AND EQUITY |  |  |
Total deferred revenue |  | 1,300 |
Accounting Standards Update 2014-09 | Two-tier distribution | Difference between Revenue Guidance in Effect before and after Topic 606 |  |  |
LIABILITIES AND EQUITY |  |  |
Total deferred revenue |  | 600 |
Accounting Standards Update 2016-01 |  |  |
ASSETS |  |  |
Accounts receivable, net |  | 0 |
Inventories |  | 0 |
Other current assets |  | 0 |
Deferred tax assets |  | (15) |
Other assets |  | 136 |
TOTAL ASSETS |  | 121 |
LIABILITIES AND EQUITY |  |  |
Income taxes payable |  | 0 |
Deferred revenue |  | 0 |
Other current liabilities |  | 0 |
Deferred revenue |  | 0 |
Other long-term liabilities |  | 13 |
(Accumulated deficit) Retained earnings |  | 283 |
Accumulated other comprehensive income (loss) |  | (175) |
TOTAL LIABILITIES AND EQUITY |  | 121 |
Accounting Standards Update 2016-16 |  |  |
ASSETS |  |  |
Accounts receivable, net |  | 0 |
Inventories |  | 0 |
Other current assets |  | (25) |
Deferred tax assets |  | 1,415 |
Other assets |  | (91) |
TOTAL ASSETS |  | 1,299 |
LIABILITIES AND EQUITY |  |  |
Income taxes payable |  | 11 |
Deferred revenue |  | 0 |
Other current liabilities |  | 0 |
Deferred revenue |  | 0 |
Other long-term liabilities |  | 0 |
(Accumulated deficit) Retained earnings |  | 1,281 |
Accumulated other comprehensive income (loss) |  | 7 |
TOTAL LIABILITIES AND EQUITY |  | $ 1,299 |

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