Equity - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Dec. 31, 2011	Apr. 02, 2011	Jan. 01, 2011
Stockholders Equity Note [Line Items]
Dividend declared, amount	$ 1,100
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
Dividend paid, per share		$ 0.40
Common stock repurchases (in shares)	23
Common stock repurchases	800		797
Remaining additional shares authorized to repurchase	282
Total par value of outstanding common stock	$ 28