Annual report pursuant to Section 13 and 15(d)

Acquisitions (Details)

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Acquisitions (Details) (USD $)
12 Months Ended
Sep. 25, 2011
Sep. 26, 2010
Sep. 27, 2009
Acquisition [Abstract]      
Effective date of Atheros acquisition 5/24/2011    
Total cash consideration, net of cash acquired $ 3,100,000,000    
Cash acquired from Atheros acquisition 233,000,000    
Assumed equity 106,000,000    
Business Acquisition, Purchase Price Allocation [Abstract]      
Acquisition cost 23,000,000    
Number of other businesses acquired 9 6 1
Cash consideration paid for other businesses acquired 466,000,000 50,000,000 17,000,000
Acquired technology-based intangible assets 150,000,000 32,000,000  
Technology-based intangible asset, weighted average useful life 5 11  
Goodwill recognized from other businesses acquired, expected to be deductible for tax purposes $ 234,000,000