Borrowings - Additional Information (Detail)	9 Months Ended
	Jul. 03, 2015 JPY (¥)	Jul. 03, 2015 USD ($)	Apr. 06, 2015 JPY (¥)	Sep. 26, 2014 USD ($)
Line Of Credit Facility [Line Items]
Short-term borrowings		$ 94,451,000		$ 0	[1]
Sumitomo Credit Facility
Line Of Credit Facility [Line Items]
Loan facility, maximum borrowing capacity | ¥			¥ 3,000,000,000
Sumitomo credit facility expiration date	Feb. 29, 2016
Credit facility accrued interest rate per annum	0.50%
Short-term borrowings	¥ 3,000,000,000	$ 24,500,000		0
Debt, weighted average interest rate	0.63%	0.63%
2013 Credit Agreement
Line Of Credit Facility [Line Items]
Date of credit agreement	Aug. 27, 2013
Percentage of voting rights pledged	65.00%
2013 Credit Agreement | 2013 Term Loan Facility
Line Of Credit Facility [Line Items]
Credit facility term	5 years
Loan facility, maximum borrowing capacity		$ 500,000,000
Loan facility maximum commitment amount		$ 100,000,000
Margin added if base rate is based on federal funds rate	0.50%	0.50%
Percentage added to Eurodollar base rate before margin	1.00%
Debt, long-term and short-term, combined amount		$ 400,000,000		$ 437,500,000
Debt, weighted average interest rate	1.31%	1.31%		1.28%
2013 Credit Agreement | 2013 Term Loan Facility | Minimum
Line Of Credit Facility [Line Items]
Line of credit, interest rate	1.00%
Line of credit, interest rate calculation (base rate margin)	0.00%
2013 Credit Agreement | 2013 Term Loan Facility | Maximum
Line Of Credit Facility [Line Items]
Line of credit, interest rate	1.25%
Line of credit, interest rate calculation (base rate margin)	0.25%
2013 Credit Agreement | Revolving Credit Facility
Line Of Credit Facility [Line Items]
Credit facility term	5 years
Loan facility, maximum borrowing capacity		$ 300,000,000
Loan facility maximum commitment amount		$ 200,000,000
Margin added if base rate is based on federal funds rate	0.50%	0.50%
Percentage added to Eurodollar base rate before margin	1.00%
2013 Credit Agreement | Revolving Credit Facility | Minimum
Line Of Credit Facility [Line Items]
Line of credit, interest rate	1.25%
Line of credit, interest rate calculation (base rate margin)	0.25%
2013 Credit Agreement | Revolving Credit Facility | Maximum
Line Of Credit Facility [Line Items]
Line of credit, interest rate	1.50%
Line of credit, interest rate calculation (base rate margin)	0.50%
2013 Credit Agreement | Revolving Credit Facility | Letter of Credit
Line Of Credit Facility [Line Items]
Loan facility, maximum borrowing capacity		$ 50,000,000
2013 Credit Agreement | Revolving Credit Facility | Swing Line Loans
Line Of Credit Facility [Line Items]
Loan facility, maximum borrowing capacity		25,000,000
2013 Revolving Credit Facility | Revolving Credit Facility
Line Of Credit Facility [Line Items]
Short-term borrowings		$ 70,000,000		$ 0
Debt, weighted average interest rate	1.56%	1.56%
2013 Revolving Credit Facility | Eurodollar | Revolving Credit Facility
Line Of Credit Facility [Line Items]
Credit facility term	30 days

[1] The condensed consolidated balance sheet as of September 26, 2014 was derived from audited financial statements as of that date, but does not include all disclosures required by accounting principles generally accepted in the United States of America.