Shareholders' Equity and Share-based Compensation - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 26, 2011	Mar. 31, 2012	Mar. 26, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares authorized	5,000,000		5,000,000
Fair value of vested RSUs as of the vesting date	$ 625,000,000	$ 69,000,000	$ 1,600,000,000	$ 728,000,000
Total intrinsic value of options at the time of exercise	719,000,000	875,000,000	1,200,000,000	1,800,000,000
Shares reserved for future issuance under the Company's stock plans (in shares)	39,100,000		39,100,000
Options assumed	41,000		41,000
Weighted-average grant date fair value	$ 400.79		$ 400.79
Weighted-average fair value of stock purchase rights per share	$ 105.25	$ 68.95	$ 96.83	$ 65.15
Income tax benefit related to share-based compensation expense	156,000,000	140,000,000	301,000,000	236,000,000
Total unrecognized compensation cost on stock options and RSUs expected to vest	4,400,000,000		4,400,000,000
Total unrecognized compensation cost on stock options and RSUs expected to vest, weighted-average recognition period (in years)			3 years 175 days
Quarterly dividends per share declared, beginning in the fourth quarter of 2012			$ 2.65
Maximum amount authorized for the repurchase of common stock			$ 10,000,000,000
Number of years expected to execute the repurchase program			3 years