Financial Instruments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2011 Customer Vendor	Sep. 24, 2011 Vendor
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturities of long-term marketable securities, minimum	1 year
Maturities of long-term marketable securities, maximum	5 years
Net deferred gain associated with cash flow hedges	$ 223	$ 290
Cash collateral received, derivative instruments	$ 526	$ 288
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 generally up to six months.
Hedged transactions, expected occurrence	6 months
Number of customers representing a significant portion of trade receivables	1
Number of vendors representing a significant portion of trade receivables	2	2
Customer One Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade receivables from customer, percentage of total trade receivables	12.00%
Total Cellular Network Carriers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade receivables from customer, percentage of total trade receivables	61.00%	52.00%
Vendor One
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vendor non-trade receivables, as percentage of total non-trade receivable	59.00%	53.00%
Vendor Two
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vendor non-trade receivables, as percentage of total non-trade receivable	20.00%	29.00%