Financing Arrangements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2015	Dec. 28, 2014
Short-term borrowings [Abstract]
Maximum aggregate principal amount of commercial paper notes issuable by the Company	$ 700,000
Maturities of the notes, maximum	397 days
Commercial paper program, notes outstanding	$ 160,000	$ 239,993
Commercial paper program, weighted average interest rate	0.61%	0.44%
Unsecured Committed [Member]
Short-term borrowings [Abstract]
Maturity Date, Line of credit facility	Mar. 30, 2020
Line of credit facility, available borrowing capacity	$ 700,000
Commitment fee based on unused portion of line of credit facility	0.15%
Interest rate under line of credit facility	Eurocurrency Rate plus 1.25%
Unsecured Uncommitted [Member]
Short-term borrowings [Abstract]
Line of credit facility, available borrowing capacity	$ 131,000
Weighted average interest rates of outstanding borrowings	3.97%	3.80%