Financial Instruments, Long-term Debt (Details) - USD ($)	3 Months Ended		12 Months Ended
	Sep. 24, 2016	Sep. 26, 2015	Jun. 25, 2016	Dec. 28, 2013	Mar. 30, 2013
Debt Instrument [Line Items]
Long-term debt	$ 1,250,000,000		$ 1,250,000,000
Short-term Debt, Fair Value	250,000,000		250,000,000
Long-term debt, current portion	(249,788,000)		(249,717,000)
Debt Issuance Cost	(9,527,000)	$ (10,193,000)
Long-term debt, excluding current portion	990,685,000		$ 990,090,000
Stated interest rate of the notes			1.69%
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed			101.00%
Interest expense relating to the Notes	9,100,000	7,300,000
Estimated fair value of long-term debt	1,028,000,000
Interest Expense	9,800,000	$ 8,200,000
Fixed Rate Note Due November 2018 at 2 Point 50 Percent [Member]
Debt Instrument [Line Items]
Long-term debt	$ 500,000,000		$ 500,000,000	$ 500,000,000
Stated interest rate of the notes	2.50%			2.50%
Effective interest rate of the Notes				2.60%
Net Proceeds From Issuance of Long Term Debt 4				$ 494,500,000
Fixed Rate Note Due March 2023 at 3 Point 375 Percent [Member]
Debt Instrument [Line Items]
Long-term debt	$ 500,000,000		$ 500,000,000		$ 500,000,000
Stated interest rate of the notes	3.375%				3.375%
Effective interest rate of the Notes					3.50%
Net Proceeds From Issuance of Long Term Debt 4					$ 490,000,000