v3.5.0.2

Employee Benefit Plans (Additional Information) (Details) $ / shares in Units, $ in Billions | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Oct. 29, 2016 USD ($) $ / shares stock_incentive_plan shares | Oct. 24, 2015 shares | Oct. 28, 2016 $ / shares | Jul. 30, 2016 $ / shares shares | Nov. 12, 2009 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of stock incentive plans | stock_incentive_plan | 3 |  |  |  |
Total compensation cost related to unvested share-based awards | $ | $ 2.7 |  |  |  |
Expected period of recognition of compensation cost, years | 2 years 6 months |  |  |  |
Closing stock price (in dollars per share) | $ / shares |  |  | $ 30.59 |  |
In-the-money exercisable stock option shares (in shares) | 8,000,000 |  |  |  |
Number Exercisable (in shares) | 8,000,000 |  |  | 64,000,000 |
Weighted- average exercise price per share (in dollars per share) | $ / shares | $ 12.43 |  |  | $ 29.66 |
2005 Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Shares reserved for issuance (in shares) | 694,000,000 |  |  |  |
Exercise price as a percentage of market value for Options | 100.00% |  |  |  |
Award requisite service period | 3 years |  |  |  |
PRSU allocation between Financial operating goals and TSR | 50.00% |  |  |  |
2005 Plan | Stock awards subsequent to November 12, 2009 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Reduction in shares available for issuance pursuant to November 12, 2009 amendment (in shares) | 1.5 |  |  |  | 1.5
2005 Plan | Stock awards subsequent to November 12, 2009 | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Expiration date for stock options and stock appreciation rights | 10 years |  |  |  |
2005 Plan | Stock awards prior to November 12, 2009 | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Expiration date for stock options and stock appreciation rights | 9 years |  |  |  |
2005 Plan | Employee Stock Option |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award vesting period | 1 year |  |  |  |
2005 Plan | Employee Stock Option | Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation award vesting rights, percentage | 20.00% |  |  |  |
Award requisite service period | 36 months |  |  |  |
2005 Plan | Employee Stock Option | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation award vesting rights, percentage | 25.00% |  |  |  |
Award requisite service period | 48 months |  |  |  |
2005 Plan | Time based stock award | Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation award vesting rights, percentage | 20.00% |  |  |  |
2005 Plan | Time based stock award | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation award vesting rights, percentage | 25.00% |  |  |  |
2005 Plan | Performance base and Market base RSU |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award requisite service period | 3 years |  |  |  |
2005 Plan | Performance based RSU based on Financial or nonFinancial operating goal [Member] | Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award requisite service period | 6 months |  |  |  |
2005 Plan | Performance based RSU based on Financial or nonFinancial operating goal [Member] | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award requisite service period | 3 years |  |  |  |
2005 Plan | PRSU based on financial performance metrics | Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation award vesting rights, percentage | 0.00% |  |  |  |
2005 Plan | PRSU based on financial performance metrics | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation award vesting rights, percentage | 150.00% |  |  |  |
2005 Plan | PRSU based on TSR | Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation award vesting rights, percentage | 0.00% |  |  |  |
2005 Plan | PRSU based on TSR | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation award vesting rights, percentage | 150.00% |  |  |  |
2005 Plan | PRSU based on nonfinancial operating goals | Minimum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation award vesting rights, percentage | 0.00% |  |  |  |
2005 Plan | PRSU based on nonfinancial operating goals | Maximum |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Share-based compensation award vesting rights, percentage | 100.00% |  |  |  |
Employee Stock Purchase Plan |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Shares reserved for issuance (in shares) | 621,000,000 |  |  |  |
Expiration date for stock options and stock appreciation rights | 24 months |  |  |  |
Shares eligible for employees purchase, percentage of discount | 15.00% |  |  |  |
Shares were issued under the Purchase Plan (in shares) | 0 | 0 |  |  |
Shares available for issuance (in shares) | 123,000,000 |  |  |  |

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