Credit Facility and Long-Term Debt (Debt Instruments) (Details) - USD ($)			3 Months Ended
	Oct. 29, 2013	May. 08, 2012	Jun. 26, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	$ (8,200,000)	$ (800,000)
Carrying amount			$ 1,493,406,000	$ 1,492,759,000
Proceeds from issuance of long term debt	991,800,000	499,200,000
Debt Issuance Cost	$ 5,500,000	$ 3,700,000
Debt Instrument, Redemption Price, Percentage			101.00%
Senior Notes [Member] | Two Point Five Percent Senior Notes Maturing November 15, 2018 [Member]
Debt Instrument [Line Items]
Due Date	Nov. 15, 2018
Coupon rate	2.50%
Effective interest rate	2.71%
Principal Amount	$ 600,000,000		$ 600,000,000	600,000,000
Debt Instrument, Unamortized Discount			(2,124,000)	(2,443,000)
Carrying amount			597,876,000	597,557,000
Debt Instrument, Fair Value Disclosure			610,440,000	606,564,000
Senior Notes [Member] | Four Point One Percent Senior Notes Maturing November 15, 2023 [Member]
Debt Instrument [Line Items]
Due Date	Nov. 15, 2023
Coupon rate	4.10%
Effective interest rate	4.29%
Principal Amount	$ 400,000,000		400,000,000	400,000,000
Debt Instrument, Unamortized Discount			(4,190,000)	(4,441,000)
Carrying amount			395,810,000	395,559,000
Debt Instrument, Fair Value Disclosure			416,400,000	417,480,000
Senior Notes [Member] | One Point Seven Five Percent Senior Note Maturing May 15, 2017 [Member]
Debt Instrument [Line Items]
Due Date		May 15, 2017
Coupon rate		1.75%
Effective interest rate		1.94%
Principal Amount		$ 500,000,000	500,000,000	500,000,000
Debt Instrument, Unamortized Discount			(280,000)	(357,000)
Carrying amount			499,720,000	499,643,000
Debt Instrument, Fair Value Disclosure			$ 502,320,000	$ 501,460,000