Debt (Details) (USD $)	3 Months Ended	12 Months Ended			1 Months Ended
	Dec. 29, 2013	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012	Oct. 25, 2011	Sep. 30, 2012
Early Repayment of Senior Debt		$ 0	$ 150,000,000	$ 0
Payments of Debt Extinguishment Costs	11,100,000	0	11,119,000	0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax			4,800,000
Write off of Deferred Debt Issuance Cost	200,000
Discount on senior unsecured notes		(2,305,000)
Maturities of Long-term Debt [Abstract]
2015		1,075,000
2016		1,120,000
2017		1,169,000
2018		1,367,000
2019		517,532,000
Thereafter		533,009,000
Long-term Debt Before Unamortized Discount		1,055,272,000
Total		1,052,967,000
Other Long-term Debt, Current	2,624,000	1,075,000	2,624,000
Line of Credit, Maturing January 8, 2019 [Member]
Unsecured revolving credit facility, amount		700,000,000
Unsecured revolving credit facility, expiry date		Jan. 08, 2019
Line of Credit Facility, Remaining Borrowing Capacity		171,800,000
Letters of credit issued and outstanding		12,200,000
Interest rate terms under amended senior unsecured revolving credit facility		The interest rates under the new senior unsecured revolving credit facility are based on the Eurocurrency rate or the base rate at the time of borrowing plus a margin. The base rate is the higher of (i) the rate of interest in effect for such day as publicly announced from time to time by JP Morgan Chase Bank, N.A. as its "prime rate," (ii) the Federal Funds rate plus 50 basis points or (iii) one-month Libor plus 1.00%.
Weighted average interest rates under amended senior unsecured revolving credit facility		The Eurocurrency margin as of December 28, 2014 was 108 basis points. The weighted average Eurocurrency interest rate as of December 28, 2014 was 0.18%, resulting in a weighted average effective Eurocurrency rate, including the margin, of 1.26%.
Aggregate borrowings under the amended facility		516,000,000
Payments of Financing Costs		1,800,000
Discount on senior unsecured notes		0
Maturities of Long-term Debt [Abstract]
2015		0
2016		0
2017		0
2018		0
2019		516,000,000
Thereafter		0
Long-term Debt Before Unamortized Discount		516,000,000
Total		516,000,000
Line of Credit, Maturing January 8, 2019 [Member] | Base Rate Option Three [Member]
Basis spread on variable rate		1.00%
Line of Credit, Maturing January 8, 2019 [Member] | Eurocurrency Rate [Member]
Basis spread on variable rate		1.08%
Weighted average Eurocurrency interest rate		0.18%
Weighted average effective Eurocurrency rate, including the margin		1.26%
Line of Credit, Maturing January 8, 2019 [Member] | Base Rate Option Two [Member]
Basis spread on variable rate		0.50%
Line of Credit, Maturing December 16, 2016 [Member]
Unsecured revolving credit facility, amount	700,000,000		700,000,000
Unsecured revolving credit facility, expiry date			Dec. 16, 2016
Aggregate borrowings under the amended facility	397,000,000		397,000,000
Line of Credit, Maturing December 16, 2016 [Member] | Eurocurrency Rate [Member]
Description of variable rate basis		Eurocurrency
Line of Credit, Maturing December 16, 2016 [Member] | Base Rate Option Two [Member]
Description of variable rate basis		Federal Funds
2021 Notes [Member]
Long-term Debt	497,400,000	497,700,000	497,400,000
Unsecured senior notes, interest rate percent					5.00%
Unsecured senior notes, face value		500,000,000			500,000,000
Gross proceeds from the issuance of debt instrument					496,900,000
Senior unsecured notes issuance as percentage of principal amount					99.372%
Discount on senior unsecured notes	(2,600,000)	(2,305,000)	(2,600,000)		(3,100,000)
Debt instrument maturity date					Nov. 25, 2021
Percentage of redemption of senior notes on or after August 15, 2021					100.00%
Percentage of redemption upon a change of control and a contemporaneous downgrade of the Notes					101.00%
Maturities of Long-term Debt [Abstract]
2015		0
2016		0
2017		0
2018		0
2019		0
Thereafter		500,000,000
Long-term Debt Before Unamortized Discount		500,000,000
Total		497,695,000
2021 Notes [Member] | Treasury Rate [Member]
Basis spread on variable rate		0.45%
Financing Lease Obligations [Member]
Additional Financing Lease Obligations				11,500,000
Discount on senior unsecured notes		0
Maturities of Long-term Debt [Abstract]
2015		1,075,000
2016		1,120,000
2017		1,169,000
2018		1,367,000
2019		1,532,000
Thereafter		33,009,000
Long-term Debt Before Unamortized Discount		39,272,000
Total		39,272,000
Other Long-term Debt	40,300,000	39,300,000	40,300,000			29,300,000
Other Long-term Debt, Current	2,600,000	1,100,000	2,600,000
Other Long-term Debt, Noncurrent	$ 37,700,000	$ 38,200,000	$ 37,700,000