Equity - Additional Information (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Mar. 30, 2013	Mar. 31, 2012
Stockholders Equity Note [Line Items]
Dividend declared			$ 1,300,000,000
Dividend declared, per share			$ 0.75
Dividend, declaration date			Nov. 28, 2012
Dividend, record date			Dec. 10, 2012
Dividend, payment date			Dec. 28, 2012
Dividend paid			1,324,000,000	1,076,000,000
Dividend paid, per share				$ 0.60
Common stock repurchases	$ 850,000,000	$ 869,000,000	$ 1,894,000,000	$ 1,669,000,000
Common stock repurchases, shares			37
Remaining shares authorized for repurchase	195		195