Stock Option Activity and Related Information (Detail) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended
	Dec. 28, 2013
Number of Options
Beginning Balance	4,094
Options granted	1
Options exercised	(1,308)
Ending Balance	2,787
Exercisable at end of the period	2,768
Expected to vest after end of the period	19
Weighted-Average Exercise Price
Beginning Balance	$ 139.65
Options granted	$ 66.26
Options exercised	$ 102.86
Ending Balance	$ 156.89
Exercisable at end of the period	$ 157.56
Expected to vest after end of the period	$ 58.03
Weighted - Average Remaining Contractual Term (in years)
Ending Balance (in years)	1 year 2 months 12 days
Exercisable at end of the period (in years)	1 year 1 month 6 days
Expected to vest after end of the period (in years)	7 years 7 months 6 days
Aggregate Intrinsic Value
Ending Balance	$ 1,124
Exercisable at end of the period	1,114
Expected to vest after end of the period	$ 10