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Employee Benefit Plans - Additional Information (Detail) (USD $)
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3 Months Ended | 12 Months Ended | 3 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | ||||||||||||||||
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Oct. 26, 2013
stock_incentive_plan
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Oct. 27, 2012
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Jul. 27, 2013
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Oct. 25, 2013
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Jul. 28, 2012
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Oct. 26, 2013
2005 Plan [Member]
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Nov. 19, 2013
2005 Plan [Member]
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Oct. 26, 2013
2005 Plan [Member]
Stock awards subsequent to November 12, 2009 [Member]
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Oct. 26, 2013
2005 Plan [Member]
Employee Stock Option [Member]
Minimum [Member]
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Oct. 26, 2013
2005 Plan [Member]
Employee Stock Option [Member]
Maximum [Member]
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Oct. 26, 2013
2005 Plan [Member]
Restricted Stock Units (RSUs) [Member]
Minimum [Member]
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Oct. 26, 2013
2005 Plan [Member]
Restricted Stock Units (RSUs) [Member]
Maximum [Member]
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Oct. 26, 2013
2005 Plan [Member]
Performance Shares [Member]
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Jul. 27, 2013
2005 Plan [Member]
Performance Shares [Member]
Minimum [Member]
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Jul. 27, 2013
2005 Plan [Member]
Performance Shares [Member]
Maximum [Member]
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Oct. 26, 2013
2005 Plan [Member]
Stock awards prior to November 12, 2009 [Member]
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Oct. 26, 2013
1996 Plan [Member]
M
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Oct. 26, 2013
1996 Plan [Member]
Minimum [Member]
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Oct. 26, 2013
1996 Plan [Member]
Maximum [Member]
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Oct. 26, 2013
Employee Stock [Member]
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Oct. 27, 2012
Employee Stock [Member]
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Oct. 26, 2013
Supplemental Plan [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||||||||
| Number Of Stock Incentive Plans | 5 | |||||||||||||||||||||
| Shares reserved for issuance (in shares) | 559,000,000 | 694,000,000 | 471,400,000 | 9,000,000 | ||||||||||||||||||
| Reduction in number of shares available for issuance after amendment approved by shareholders (ratio) | 1.5 | |||||||||||||||||||||
| Stock options and stock appreciation rights exercise price percentage of the fair market value of the underlying stock on the grant date (percentage) | 100.00% | 100.00% | ||||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period | 10 years | 9 years | 9 years | |||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | 25.00% | 20.00% | 25.00% | 20.00% | 0.00% | 150.00% | 25.00% | 20.00% | ||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period | 36 months | 48 months | 3 years | 36 months | 48 months | |||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | 2,500,000,000 | |||||||||||||||||||||
| Number of months in which stock options ratably exercise, nonstandard | 60 | |||||||||||||||||||||
| ESPP- offering period description | 24-month offering period, which consists of four consecutive 6-month purchase periods. | |||||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date (in percentage) | 15.00% | |||||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date | Jan. 03, 2020 | |||||||||||||||||||||
| Shares issued under employee purchase plan (in shares) | 0 | 0 | ||||||||||||||||||||
| Shares available for issuance under Employee Stock Purchase Plan (in shares) | 217,000,000 | 228,000,000 | 218,000,000 | 51,000,000 | ||||||||||||||||||
| Unrecognized compensation cost related to unvested share-based awards | $ 2,400,000,000 | |||||||||||||||||||||
| Expected period of recognition of compensation cost, years | 2 years 6 months | |||||||||||||||||||||
| Income tax benefit for employee share-based compensation expense | $ 78,000,000 | $ 79,000,000 | ||||||||||||||||||||
| Closing stock price | $ 22.46 | |||||||||||||||||||||
| In-the-money exercisable stock option (in shares) | 61,000,000 | |||||||||||||||||||||
| Stock options exercisable (in shares) | 244,000,000 | 271,000,000 | ||||||||||||||||||||
| Stock options exercisable, weighted-average exercise price per share | $ 25.08 | $ 24.84 | ||||||||||||||||||||
| Performance restricted stock units, based on operating performance goals | 50.00% | |||||||||||||||||||||
| Performance restricted stock units, based on TSR | 50.00% | |||||||||||||||||||||