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Changes in Accrued Warranties and Related Costs (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Sep. 24, 2011
Standard Product Warranty [Line Items]      
Beginning accrued warranty and related costs $ 1,638 $ 1,240 $ 761
Cost of warranty claims (3,703) (1,786) (1,147)
Accruals for product warranty 5,032 2,184 1,626
Ending accrued warranty and related costs $ 2,967 $ 1,638 $ 1,240