Debt (Senior Notes) (Details) (USD $)	0 Months Ended	3 Months Ended		6 Months Ended		0 Months Ended		0 Months Ended	6 Months Ended
	Sep. 25, 2013	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013	Jan. 31, 2013 3.85% Senior Notes Due February 1,2023 [Member]	Jun. 28, 2014 3.85% Senior Notes Due February 1,2023 [Member]	Jan. 17, 2006 6.125% Notes, Payable January 15, 2016 [Member]	Jun. 29, 2013 6.125% Notes, Payable January 15, 2016 [Member]	Jun. 28, 2014 6.125% Notes, Payable January 15, 2016 [Member]	Jul. 15, 2014 6.125% Notes, Payable January 15, 2016 [Member] Subsequent Event [Member]
Debt Instrument [Line Items]
Aggregate principal amount of debts						$ 600,000,000		$ 900,000,000
Interest rate percentage						3.85%	3.85%	6.125%		6.125%
Payment of financing costs	1,836,000					6,000,000
Increase in interest rate from rating agency downgrade									0.25%
Maximum increase in interest rate per agency from rating agency downgrade									1.00%
Increase in interest expense per quarter for .25% increase in notes per $100,000 of outstanding notes		20,702,000	25,312,000	42,798,000	44,468,000				63,000
Incremental increase in outstanding notes								100,000,000
Amount of outstanding notes to be redeemed											$ 200,000,000