Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation Share-Based Compensation Expense (Details)

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Basis of Presentation Share-Based Compensation Expense (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Mar. 31, 2013
Mar. 25, 2012
Mar. 31, 2013
Mar. 25, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense before income taxes $ 268 $ 240 $ 551 $ 487
Related income tax benefit (48) (56) (111) (109)
Share-based compensation expense, net of income taxes 220 184 440 378
Share-based compensation expense related to share-based awards granted during period     71 82
Net share-based awards granted, after forfeitures and cancellations, as a percentage of outstanding shares as of the beginning of each fiscal period     0.40% 0.50%
Total share-based awards granted as a percentage of outstanding shares as of the end of each fiscal period     0.40% 0.60%
Cost of equipment and services revenues [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense before income taxes 17 17 37 36
Research and development [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense before income taxes 156 126 313 253
Selling, general and administrative [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense before income taxes 95 97 201 198
Stock Options [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation expense related to nonvested awards 144   144  
Weighted average period over which unrecognized compensation expense related to nonvested awards is expected to be recognized     10 months 24 days  
Restricted Stock Units [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation expense related to nonvested awards $ 1,200   $ 1,200  
Weighted average period over which unrecognized compensation expense related to nonvested awards is expected to be recognized     1 year 7 months 6 days