Financial Instruments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 28, 2013 Customer Vendor	Sep. 28, 2013 Vendor Customer
Financial Instruments [Line Items]
Maturities of long-term marketable securities, minimum	1 year
Maturities of long-term marketable securities, maximum	5 years
Range of time hedged in cash flow hedge	The Company typically hedges portions of its forecasted foreign currency exposure associated with revenue and inventory purchases, typically for up to 12 months.
Hedged transactions, expected occurrence	12 months
Hedged interest rate transactions, expected occurrence	5 years
Cash collateral posted, derivative instruments		$ 164
Cash collateral received, derivative instruments	165
Reduction to derivative assets by rights of set-off associated with derivative contracts	356	333
Reduction to derivative liabilities by rights of set-off associated with derivative contracts	356	333
Net derivative liability	$ 66	$ 57
Number of customers representing a significant portion of trade receivables	0	2
Customers representing a significant portion of trade receivables, description	There were no customers that accounted for 10% or more of the Company's trade receivables as of December 28, 2013.	As of September 28, 2013, the Company had two customers that represented 10% or more of total trade receivables, one of which accounted for 13% and the other 10%.
Number of vendors representing a significant portion of non-trade receivables	2	3
Customer One
Financial Instruments [Line Items]
Trade receivables from customer, percentage of total trade receivables		13.00%
Customer Two
Financial Instruments [Line Items]
Trade receivables from customer, percentage of total trade receivables		10.00%
Total Cellular Network Carriers
Financial Instruments [Line Items]
Trade receivables from customer, percentage of total trade receivables	48.00%	68.00%
Vendor One
Financial Instruments [Line Items]
Vendor non-trade receivables, as percentage of total non-trade receivable	62.00%	47.00%
Vendor Two
Financial Instruments [Line Items]
Vendor non-trade receivables, as percentage of total non-trade receivable	15.00%	21.00%
Vendor Three
Financial Instruments [Line Items]
Vendor non-trade receivables, as percentage of total non-trade receivable		15.00%