Long-Term Debt and Capital Leases - Credit Facility and Capital Lease (Details) - USD ($)	Sep. 27, 2015	Aug. 31, 2015	Dec. 28, 2014
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 750,000,000
Available borrowings capacity under letters of credit	531,100,000
Total capital leases	9,200,000		$ 10,400,000
Capital leases, current	1,300,000		$ 1,300,000
Letter of Credit
Line of Credit Facility [Line Items]
Letters of credit, outstanding	$ 16,200,000
Senior Notes | Private Placement Senior Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount		$ 125,000,000
Senior Notes | Senior Unsecured Notes 2.81% Due November 5, 2020
Line of Credit Facility [Line Items]
Debt instrument, face amount		$ 25,000,000.0
Stated interest rate		2.81%
Senior Notes | Senior Unsecured Notes 3.28% Due November 5, 2020
Line of Credit Facility [Line Items]
Debt instrument, face amount		$ 100,000,000.0
Stated interest rate		3.28%