Equity - Additional Information (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended			9 Months Ended
	Jun. 27, 2015	Dec. 27, 2014	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014	Jan. 30, 2015	Sep. 27, 2014
Equity [Abstract]
Dividend, declaration date	Jun. 24, 2015	Dec. 03, 2014
Dividends declared per share	$ 0.66	$ 1.15	$ 0.00	$ 1.81	$ 0.86
Dividend declared	$ 1,100	$ 1,900			$ 1,500
Dividend, record date	Jul. 06, 2015	Dec. 15, 2014
Dividend, payment date	Jul. 29, 2015	Jan. 08, 2015
Common stock repurchases, shares				29
Common stock repurchases	$ 1,035		$ 1,833	$ 2,823	$ 5,087
Remaining shares authorized for repurchase	386			386		400
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	$ 30			$ 30			$ 55