Income Tax (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 26, 2015	Jun. 27, 2014	Jun. 26, 2015	Jun. 27, 2014	Sep. 26, 2014
Income Taxes
Income tax expense	$ 100	$ 102	$ 85	$ 331
Income tax benefit associated with settlement of certain U.S. tax matters			202
Income tax penalties and interest accrued	1,069		1,069		$ 1,136
Income tax penalties and interest accrued, location income taxes	1,062		1,062		$ 1,115
Income tax penalties and interest expense (benefit)			(14)
Unrecognized income tax benefits, maximum amount that could be resolved in next twelve months	$ 70		$ 70