v2.4.0.6
Employee Benefit Plans - Additional Information (Detail) (USD $)
3 Months Ended 3 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended 3 Months Ended 12 Months Ended
Oct. 27, 2012
Y
Oct. 29, 2011
Jul. 30, 2012
Jul. 27, 2012
Oct. 27, 2012
Performance Based Restricted Stock Units [Member]
Oct. 29, 2011
Performance Based Restricted Stock Units [Member]
Dec. 31, 2007
Supplemental Plan [Member]
Oct. 27, 2012
Employee Stock Purchase Plan [Member]
Nov. 12, 2009
2005 Plan [Member]
Nov. 12, 2009
2005 Plan [Member]
Employee Stock Incentive Plans [Member]
Oct. 27, 2012
2005 Plan [Member]
Employee Stock Incentive Plans [Member]
M
Y
Nov. 15, 2007
2005 Plan [Member]
Employee Stock Incentive Plans [Member]
Oct. 27, 2012
2005 Plan [Member]
Employee Stock Incentive Plans [Member]
Minimum [Member]
Oct. 27, 2012
2005 Plan [Member]
Employee Stock Incentive Plans [Member]
Maximum [Member]
Oct. 27, 2012
1996 Plan [Member]
Employee Stock Incentive Plans [Member]
M
Y
Oct. 27, 2012
1996 Plan [Member]
Employee Stock Incentive Plans [Member]
Minimum [Member]
Jul. 29, 2006
1996 Plan [Member]
Employee Stock Incentive Plans [Member]
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                  
Share Based Compensation Arrangement By Share Based Payment Award Exercisable Percentage Maximum                           25.00%     25.00%
Share Based Compensation Arrangement By Share Based Payment Award Exercisable Percentage Minimum                         20.00%     20.00%  
Reduction in number of shares available for issuance after amendment approved by shareholders                 1.5 1.5              
Unrecognized compensation cost related to unvested share-based awards $ 1,900,000,000                                
Expected period of recognition of compensation cost, years 2.3                                
Income tax benefit for employee share-based compensation expense $ 79,000,000 $ 90,000,000                              
Expiration date for stock options and stock appreciation rights, max time from grant date prior to date, in years                   nine              
Expiration date for stock options and stock appreciation rights, max time from grant date after date, in years                     10       9    
Shares reserved for issuance               471,400,000                  
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date               15.00%                  
Closing stock price       $ 17.29                          
Shares for eligible employees, offering period               Eligible employees are offered shares through a 24-month offering period, which consists of four consecutive 6-month purchase periods                  
Stock options and stock appreciation rights exercise price percentage of the fair market value of the underlying stock on the grant date                     100.00%            
Number of months in which stock options ratably exercise, minimum                     36       36    
Number of months in which stock options ratably exercise, maximum                     48       48    
Ratable vesting period, months                             60    
Stock options exercisable 438,000,000   512,000,000                            
In-the-money exercisable stock option shares 9,000,000                                
Stock options exercisable, weighted-average exercise price per share $ 23.17 $ 22.65                              
Shares reserved in employee stock incentive plan             9,000,000         559,000,000     2,500,000,000    
Shares held in Employee Stock Option Plan, Suspense Shares               87,000,000                  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period         4,000,000 1,000,000