Annual report pursuant to Section 13 and 15(d)

The Company and Its Significant Accounting Policies Share-Based Compensation (Details)

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The Company and Its Significant Accounting Policies Share-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Sep. 27, 2015
Sep. 28, 2014
Sep. 29, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Share-based compensation expense before income taxes $ 1,026 $ 1,059 $ 1,105
Related income tax benefit (190) (203) (217)
Share-based compensation expense, net of income taxes 836 856 888
Share-based compensation expense related to share-based awards granted during the period 267 249 242
Incremental tax benefits from share-based compensation 103 280 231
Cost of equipment and services revenues [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Share-based compensation expense before income taxes 42 49 71
Research and development [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Share-based compensation expense before income taxes 659 672 643
Selling, general and administrative [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Share-based compensation expense before income taxes $ 325 $ 338 $ 391
Restricted Stock Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
RSUs granted, weighted average grant date fair value $ 68.77 $ 72.81 $ 64.21
Annual pre-vesting forfeiture Rate 3.00% 3.00% 3.00%