Financing Arrangements (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2014	Dec. 29, 2013
Short-term borrowings [Abstract]
Maximum aggregate principal amount of commercial paper notes issuable by the Company	$ 700,000
Maturities of the notes, maximum (in days)	397 days
Commercial paper program, notes outstanding	239,976	0
Commercial paper program, weighted average interest rate	0.44%
Unsecured Committed [Member]
Short-term borrowings [Abstract]
Maturity Date, Line of credit facility	Oct. 01, 2017
Line of credit facility, available borrowing capacity	700,000
Commitment fee based on unused portion of line of credit facility (in hundredths)	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	$ 108,000
Weighted average interest rates of outstanding borrowings (in hundredths)	3.80%	5.25%