Other Income and Expense (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 24, 2011
Other Income Expense [Line Items]
Interest and dividend income	$ 1,616	$ 1,088	$ 519
Interest expense	(136)	0	0
Other expense, net	(324)	(566)	(104)
Total other income/(expense), net	$ 1,156	$ 522	$ 415