Income Taxes (Details 3) - USD ($) $ in Millions	12 Months Ended
	Sep. 25, 2015	Sep. 26, 2014	Sep. 27, 2013
Reconciliation between U.S. federal income taxes at the statutory rate and provision (benefit) for income taxes on continuing operations
Notional U.S. federal income tax provision at the statutory rate	$ 551	$ 616	$ 378
U.S. state income tax provision (benefit), net	11	(4)	(58)
Other (income) expense-Tax Sharing Agreement	18	(23)	64
Tax law changes	10	(1)
Tax credits	(9)	(8)	(10)
Non-U.S. net earnings	(275)	(287)	(256)
Nondeductible charges	2	3
Change in accrued income tax liabilities	(183)	112	(164)
Valuation allowance	(3)	(239)	(30)
Legal entity restructuring	211
Other	4	(23)	1
Provision (benefit) for income taxes	$ 337	$ 146	$ (75)