Financial Instruments, Long-term Debt (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 23, 2017	Sep. 24, 2016	Jun. 24, 2017	Dec. 28, 2013	Mar. 30, 2013
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount	$ 1,500,000		$ 1,500,000
Amortization of Debt Issuance Costs	(11,594)		(12,322)
Long-term debt, excluding current portion	1,488,406		$ 1,487,678
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed			101.00%
Interest expense relating to the Notes	12,600	$ 9,100
Estimated fair value of long-term debt	1,518,000
Interest Expense	12,600	$ 9,800
Fixed Rate Note Due June 2027 at 3 Point 45 Percent [Member]
Debt Instrument [Line Items]
Long-term debt	500,000		$ 500,000
Fixed Rate Note Due November 2018 at 2 Point 50 Percent [Member]
Debt Instrument [Line Items]
Long-term debt	$ 500,000		500,000	$ 500,000
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
Fxed Rate Note Due March 2023 at 3 Point 375 Percent [Member]
Debt Instrument [Line Items]
Long-term debt	$ 500,000		$ 500,000		$ 500,000
Effective interest rate of the Notes					3.50%
proceeds from issuance of long term debt 3					$ 490,000
FixedRateNoteDueJune2027at3Point450Percent[Member] [Member]
Debt Instrument [Line Items]
Stated interest rate of the notes			3.45%
Fixed Rate Note Due June 2027 at 3 Point 50 Percent [Member] [Domain]
Debt Instrument [Line Items]
Effective interest rate of the Notes			3.50%
Fixed Rate Note Due June 2027 at 3 Point 50 Percent [Member] [Member]
Debt Instrument [Line Items]
Net Proceeds From Issuance of Long Term Debt 5			$ 495,200
Fixed Rate Note Due March 2023 at 3 Point 375 Percent [Member]
Debt Instrument [Line Items]
Stated interest rate of the notes	3.375%				3.375%