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Stock Transactions And Stock-Based Compensation (Narrative) (Details) - USD ($)
shares in Thousands, $ in Millions
3 Months Ended 9 Months Ended
Jul. 14, 2015
Jul. 03, 2015
Oct. 02, 2015
Oct. 02, 2015
Sep. 26, 2014
Jul. 16, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares redeemed through the distribution of the Communications Business, shares held as Treasury shares       26,000    
Stock repurchase program, authorized shares to be repurchased           20,000
Stock repurchase program, remaining number of shares authorized to be repurchased     20,000 20,000    
Common shares reserved for issuance under the 2007 Stock Incentive Plan, shares     22,000 22,000    
Total number of shares withheld sufficient to fund minimum tax withholding requirements related to exercising of stock options and vesting of RSUs, shares       503    
Total value of shares withheld sufficient to fund minimum tax withholding requirements related to exercising of stock options and vesting of RSUs       $ 44    
PSUs            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period       3 years    
Share-based compensation arrangement by share-based payment award, percentage of awards granted       25.00%    
RSUs/PSUs            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement by share-based payment award, percentage of awards granted       25.00%    
Total unrecognized compensation cost     $ 187 $ 187    
Weighted average period for cost to be recognized   3 years        
Tax benefit realized related to exercise of options     13 $ 34    
Stock Options            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation arrangement by share-based payment award, percentage of awards granted       50.00%    
Total unrecognized compensation cost     141 $ 141    
Weighted average period for cost to be recognized   3 years        
Aggregate intrinsic value of options exercised       245 $ 95  
Cash receipts due to exercise of options       169 $ 79  
Tax benefit realized related to exercise of options     $ 27 $ 79    
Communications business            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares redeemed through the distribution of the Communications Business, shares held as Treasury shares 26,000     26,000