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 $)
 3 Months Ended 6 Months Ended
Mar. 30, 2014
Mar. 31, 2013
Mar. 30, 2014
Mar. 31, 2013
Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Share-based compensation expense before income taxes $ 251,000,000 $ 268,000,000 $ 532,000,000 $ 551,000,000
Related income tax benefit (53,000,000) (48,000,000) (109,000,000) (111,000,000)
Share-based compensation expense, net of income taxes 198,000,000 220,000,000 423,000,000 440,000,000
Share-based compensation expense related to share-based awards granted during period     82,000,000 71,000,000
Net share-based awards granted during period, after forfeitures and cancelations, as a percentage of outstanding shares as of the beginning of each fiscal period     0.40% 0.40%
Total share-based awards granted during period as a percentage of outstanding shares as of the end of each fiscal period     0.50% 0.40%
Cost of equipment and services revenues [Member]
        
Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Share-based compensation expense before income taxes 13,000,000 17,000,000 25,000,000 37,000,000
Research and development [Member]
        
Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Share-based compensation expense before income taxes 163,000,000 156,000,000 336,000,000 313,000,000
Selling, general and administrative [Member]
        
Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Share-based compensation expense before income taxes 75,000,000 95,000,000 171,000,000 201,000,000
Restricted Stock Units [Member]
        
Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Unrecognized compensation expense related to nonvested restricted stock units $ 1,300,000,000   $ 1,300,000,000  
Weighted average period over which unrecognized compensation expense related to nonvested restricted stock units is expected to be recognized     1 year 10 months