Stockholders' Equity Share Repurchase Program (Details) - USD ($) $ in Billions	6 Months Ended
	Mar. 27, 2016	Mar. 29, 2015	Mar. 09, 2015
Share Repurchase Program [Line Items]
Authorized amount			$ 15.0
Stock repurchased and retired during period, Shares	68,335,000	50,699,000
Stock repurchased and retired during period, Value before commissions	$ 3.6	$ 3.6
Remaining authorized amount	$ 3.3