Equity - Additional Information (Detail) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Apr. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Stockholders Equity Note [Line Items]
Dividend declared, amount				$ 1,100,000,000
Dividend declared, per share				$ 0.60
Dividend, declared date				Nov. 30, 2011
Dividend, record date				Dec. 16, 2011
Dividend, payment date				Jan. 18, 2012
Dividend paid			756,000,000	1,076,000,000	756,000,000
Dividend paid, per share			$ 0.40
Common stock repurchases (in shares)				53
Common stock repurchases	373,000,000	1,427,000,000		2,042,000,000	3,029,000,000
Remaining additional shares authorized to repurchase	251			251
Total par value of outstanding common stock	$ 28,000,000			$ 28,000,000