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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
Share data in Millions, unless otherwise specified
1 Months Ended 12 Months Ended
Oct. 29, 2013
Sep. 28, 2013
Sep. 28, 2013
Sep. 29, 2012
Sep. 24, 2011
Significant Accounting Policies [Line Items]          
Deliverable in arrangements   3 3    
Advertising expense     $ 1,100,000,000 $ 1,000,000,000 $ 933,000,000
Measurement of tax position, minimum likelihood of tax benefits being realized upon ultimate settlement     Greater than 50%    
Measurement of tax position, minimum likelihood of tax benefits being realized upon ultimate settlement, percentage   50.00% 50.00%    
Potentially dilutive securities excluded from computation of diluted earnings per common share because their effect would have been antidilutive     4.2 1.0 1.7
Net fair value of all derivative instruments designated as fair value hedging instruments   0 0 0 0
Depreciation and amortization expense     5,800,000,000 2,600,000,000 1,600,000,000
Goodwill impairment charges     0 0 0
Intangible asset impairment charges     0 0 0
Minimum
         
Significant Accounting Policies [Line Items]          
Estimated selling price for software upgrade right and non-software services for qualifying hardware devices (USD/unit sold)     5 5 5
iPhone and iPad estimated selling price for software upgrade rights and non-software services   15      
Anticipated Mac estimated selling price for software upgrade rights and non-software services 20        
Estimated life of hardware device   2 years 2 years 2 years 2 years
Estimated useful life of internal use software     3 years    
Amortized acquired intangible assets with definite useful lives period (in years)     3 years    
Minimum | Machinery, Equipment and Internal Use Software
         
Significant Accounting Policies [Line Items]          
Estimated useful lives of assets (Years)     2 years    
Maximum
         
Significant Accounting Policies [Line Items]          
Estimated selling price for software upgrade right and non-software services for qualifying hardware devices (USD/unit sold)     25 25 25
Increase in estimated selling price for iPhone and iPad software upgrade rights   5      
iPhone and iPad estimated selling price for software upgrade rights and non-software services   25      
Anticipated Mac estimated selling price for software upgrade rights and non-software services $ 40        
Estimated life of hardware device   4 years 4 years 4 years 4 years
Estimated useful life of internal use software     5 years    
Amortized acquired intangible assets with definite useful lives period (in years)     7 years    
Maximum | Building
         
Significant Accounting Policies [Line Items]          
Estimated useful lives of assets (Years)     30 years    
Maximum | Machinery, Equipment and Internal Use Software
         
Significant Accounting Policies [Line Items]          
Estimated useful lives of assets (Years)     5 years    
Maximum | Leasehold Improvements
         
Significant Accounting Policies [Line Items]          
Estimated useful lives of assets (Years)     10 years