Income Tax Expense / (Benefit) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 27, 2014		Sep. 28, 2013		Sep. 29, 2012
Current
Federal	$ 2,932		$ 2,354		$ 1,975
State	206		98		227
Foreign	600	[1]	474	[1]	422	[1]
Current Income Tax Expense (Benefit), Total	3,738		2,926		2,624
Deferred
Federal	409		29		465
State	81		61		(2)
Foreign	14		(32)		0
Deferred Income Tax Expense (Benefit), Total	504		58		463
Income taxes	$ 4,242		$ 2,984		$ 3,087

[1] Includes foreign withholding taxes