Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)	12 Months Ended
	Sep. 24, 2011 Year Contract Country Store Vendor	Sep. 25, 2010	Sep. 26, 2009
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized acquired intangible assets with definite lives period (in years), minimum	3
Amortized acquired intangible assets with definite lives period (in years), maximum	7
Business acquisitions, net of cash acquired	$ 244,000,000	$ 638,000,000	$ 0
Business acquisitions allocated to goodwill	167,000,000	535,000,000
Business acquisitions allocated to intangible assets	77,000,000	107,000,000
Goodwill	896,000,000	741,000,000
Goodwill impairment charges	0	0	0
Amortization expense related to acquired intangible assets	192,000,000	69,000,000	53,000,000
Weighted-average amortization period for acquired intangible assets (in years)	6.2
Business acquisitions, Nortel's patent, purchase price	4,500,000,000
Business acquisitions, purchase price	$ 2,600,000,000
Business acquisitions allocated to amortizable intangible assets, amortization period	7 years