Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Apr. 01, 2012	Dec. 30, 2012
Debt Instrument [Line Items]
Carrying Cost	$ 1,394,387	$ 1,400,942	$ 1,396,421
Fair Value	1,567,818	1,516,036	1,600,212
Principal Amount	1,384,895	1,384,895	1,384,895
Interest Rate Swap 6.125% Note Due 2014 [Member]
Derivative [Line Items]
Interest rate swap notional amount		400,000
Interest rate swap maturity date		2014
Fair value, interest rate swap		16,047
Gain from interest rate swap		70
Notes 6.125% Due 2014 [Member]
Debt Instrument [Line Items]
Carrying Cost	434,492	441,047	436,526
Fair Value	449,395	461,678	455,175
Principal Amount	425,000	425,000	425,000
Maturity Date	2014	2014	2014
Interest Rate	6.125%	6.125%	6.125%
Adjustments included in carrying costs related to interest rate swaps	9,492	16,047	11,526
Notes 6.30% Due 2017 [Member]
Debt Instrument [Line Items]
Carrying Cost	350,000	350,000	350,000
Fair Value	407,085	400,260	399,700
Principal Amount	350,000	350,000	350,000
Maturity Date	2017	2017	2017
Interest Rate	6.30%	6.30%	6.30%
Debentures 6.60% Due 2028 [Member]
Debt Instrument [Line Items]
Carrying Cost	109,895	109,895	109,895
Fair Value	126,588	118,148	129,687
Principal Amount	109,895	109,895	109,895
Maturity Date	2028	2028	2028
Interest Rate	6.60%	6.60%	6.60%
Notes 6.35% Due 2040 [Member]
Debt Instrument [Line Items]
Carrying Cost	500,000	500,000	500,000
Fair Value	584,750	535,950	615,650
Principal Amount	$ 500,000	$ 500,000	$ 500,000
Maturity Date	2040	2040	2040
Interest Rate	6.35%	6.35%	6.35%