Strategic Arrangement - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Mar. 29, 2013	Mar. 29, 2013
Strategic Alliance And Collaboration [Line Items]
Fixed fee committed	$ 10	$ 10
License fee committed	20	20
Strategic Global Partnership
Strategic Alliance And Collaboration [Line Items]
Accrual of fixed fees during the period	1
Siemens | Strategic Global Partnership
Strategic Alliance And Collaboration [Line Items]
Payment due for accrued fixed fees	$ 2	$ 2
Accrued fixed fees, due date for first installment	Sep. 30, 2013	Sep. 30, 2013