Employee Benefit Plans (Narrative) (Details) (USD $)	12 Months Ended				12 Months Ended																				12 Months Ended			12 Months Ended			12 Months Ended		1 Months Ended	12 Months Ended
	Dec. 28, 2013 plan	Dec. 29, 2012	Dec. 31, 2011	Jan. 03, 2009	Dec. 28, 2013 Minimum [Member]	Dec. 28, 2013 Maximum [Member]	Dec. 28, 2013 Hourly 401K Savings Plan [Member]	Dec. 31, 2011 Hourly 401K Savings Plan [Member]	Dec. 28, 2013 Hourly 401K Savings Plan [Member] Minimum [Member]	Dec. 28, 2013 Hourly 401K Savings Plan [Member] Maximum [Member]	Dec. 31, 2011 Hourly 401K Savings Plan [Member] Maximum [Member]	Dec. 28, 2013 Salaried 401(k) Savings Plan [Member]	Dec. 28, 2013 Salaried 401(k) Savings Plan [Member] Minimum [Member]	Dec. 31, 2011 Salaried 401(k) Savings Plan [Member] Minimum [Member]	Dec. 28, 2013 Salaried 401(k) Savings Plan [Member] Maximum [Member]	Dec. 31, 2011 Salaried 401(k) Savings Plan [Member] Maximum [Member]	Dec. 29, 2012 Salary and Hourly 401k Savings Plan [Member]	Dec. 31, 2011 Salary and Hourly 401k Savings Plan [Member]	Dec. 31, 2011 Griffins Defined Contribution Plans [Member]	Dec. 31, 2011 DICI Non-Union Plan [Member]	Dec. 28, 2013 Small Companies [Member] Minimum [Member]	Dec. 28, 2013 Small Companies [Member] Maximum [Member]	Dec. 28, 2013 Fixed Income Securities [Member]	Dec. 29, 2012 Fixed Income Securities [Member]	Dec. 28, 2013 Fixed Income Securities [Member] Domestic	Dec. 28, 2013 Equity Funds [Member]	Dec. 28, 2013 Fixed Income Funds [Member]	Dec. 28, 2013 Equity Securities, International [Member] Emerging Market [Member]	Dec. 28, 2013 Equity Securities [Member]	Dec. 29, 2012 Equity Securities [Member]	Dec. 28, 2013 Equity Securities [Member] Domestic	Dec. 28, 2013 Defined Benefit Plans Assets, Total [Member] Investment [Domain]	Jul. 31, 2005 Central States, Southeast and Southwest Areas Pension Plan [Member]	Dec. 28, 2013 Central States, Southeast and Southwest Areas Pension Plan [Member]		Dec. 29, 2012 Central States, Southeast and Southwest Areas Pension Plan [Member]		Dec. 31, 2011 Central States, Southeast and Southwest Areas Pension Plan [Member]
Employee Benefit Plans [Line Items]
Domestic Pension Plan Benefits Percentage Of The Projected Benefit Obligation	97.00%
Pension Contributions	$ 4,000,000	$ 1,900,000
Defined Contribution Plan, Employer Matching Contribution, Percent							25.00%	100.00%				25.00%
Defined Contribution Plan, Pay Period Maximum Contribution Per Employee, Percent							6.00%					6.00%
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent									2.00%	5.00%			3.00%	2.00%	6.00%	5.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum																									35.00%						20.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum																									80.00%						65.00%
Defined Contribution Plan, Employer Matching Contribution Per Pay Period, First Amount Of Participants Deferrals								10
Defined Contribution Plan, Contributions by Plan Participants											520
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Amount								520
Defined Contribution Plan, Employer Contribution Amount	8,200,000																7,200,000	2,200,000	500,000	100,000
Equity Securities	100.00%	100.00%																					48.30%	38.70%		60.00%	40.00%		51.70%	61.30%
Period of Return Of Double and Single Digit Returns	10 years
Investment Horizon of Greater Than	10 years
Expected long-term rate of return on assets	7.35%	7.35%	7.85%
Capitalization, Long-term Debt and Equity																					300,000,000	2,000,000,000
Concentration Risk, Percentage																												10.00%				1.50%
Investment Objectives Achievement Period					5 years	7 years
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	2,000,000
Multiemployer Plan, Contributions To Individual Plan, Percent						5.00%
Number Of Multiemployer Plans, Withdrawal Obligation Could Be Material	2
Multiemployer Plan, Period Contributions	3,149,000	3,200,000	3,100,000																															782,000	[1],[2]	746,000	[1],[2]	705,000	[1],[2]
Number of Multiemployer Plans, Certified Red Zone	4
Number of Multiemployer Plans, Certified Yellow Zone	3
Multiemployer Plan, Withdrawal Obligation	$ 900,000	$ 1,200,000		$ 3,200,000
Multiemployer Plans, IRS Extended Amortization Period																																	10 years

[1] In July 2005 this plan received a 10 year extension from the IRS for amortizing unfunded liabilities.

[2] The Company has several processing plants that participate in the Central States, Southeast and Southwest Areas Pension Plan under collective bargaining agreements that require minimum funding contributions. Certain of these agreements have expired and are being renegotiated with others having expiration dates through April 30, 2016.