Income Taxes - Additional Information (Detail) (USD $)	Dec. 28, 2013	Sep. 28, 2013
Income Taxes [Line Items]
Gross unrecognized tax benefits	$ 3,000,000,000	$ 2,700,000,000
Unrecognized tax benefits that would affect effective tax rate, if recognized	1,500,000,000	1,400,000,000
Unrecognized tax benefits, gross interest and penalties accrued	643,000,000	590,000,000
Reasonably possible reduction in unrecognized tax benefits in the next 12 months, minimum		140,000,000
Reasonably possible reduction in unrecognized tax benefits in the next 12 months, maximum		$ 160,000,000