Postretirement Plans - Additional Information (Detail) (USD $)	12 Months Ended									12 Months Ended			12 Months Ended									12 Months Ended					12 Months Ended		12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011	Dec. 29, 2012 Discretionary	Dec. 29, 2012 Maximum	Dec. 31, 2011 Maximum	Jan. 01, 2011 Maximum	Dec. 29, 2012 Minimum	May 20, 2011 Tasty Qualified Plan	Dec. 31, 2011 Tasty Nonqualified Plan	Dec. 29, 2012 Common Stock	Dec. 31, 2011 Common Stock	Dec. 29, 2012 Net Periodic Pension Cost	Dec. 31, 2011 Net Periodic Pension Cost	Jan. 01, 2011 Net Periodic Pension Cost	Dec. 29, 2012 Projected Benefit Obligation	Dec. 31, 2011 Projected Benefit Obligation	Dec. 29, 2012 Accumulated Benefit Obligations	Dec. 31, 2011 Accumulated Benefit Obligations	Dec. 29, 2012 Fair Value Of Plan Assets	Dec. 31, 2011 Fair Value Of Plan Assets	Dec. 29, 2012 Net Periodic Pension Cost	Dec. 29, 2012 Red Zone	Dec. 29, 2012 Yellow Zone	Dec. 29, 2012 Green Zone	Dec. 29, 2012 Qualified Pension Plans	Dec. 29, 2012 Qualified Pension Plans Required	Dec. 29, 2012 Non Qualified Pension Plans	Dec. 29, 2012 Non Qualified Pension Plans Required	Dec. 29, 2012 Multiemployer Plans	Dec. 31, 2011 Multiemployer Plans	Jan. 01, 2011 Multiemployer Plans	Feb. 02, 2012 Multiemployer Plans
Pension and Other Postretirement Benefits Disclosure [Line Items]
Unfunded liability at acquisition									$ 29,000,000
Settlement cost										200,000				768,000
Expected pension income for fiscal 2013	1,700,000
Actual return on plan assets	41,900,000	100,000	27,000,000										41,891,000	67,000
Amortization from accumulated other comprehensive income into net periodic benefit cost													6,200,000									(1,100,000)
Accumulated benefit obligation and projected benefit obligation in excess of plan assets																514,600,000	472,800,000	513,400,000	471,700,000	365,700,000	330,100,000
Expected long-term rate of return on plan assets	8.00%												8.00%	8.00%	8.00%							8.00%
Average annual return on the plan assets over the last 15 years	7.70%
Defined benefit plan equity securities included in common stock											2,020,242	2,020,242
Percentage of total plan assets	100.00%	100.00%									12.90%	11.60%
Equity securities, amount											47,000,000	38,300,000
Contribution of company to company pension plans				9,100,000									18,579,000	13,314,000													9,000,000		400,000
Expected company contribution	867,000																									15,700,000		400,000
Contributions by participants	400,000	400,000	400,000
Expense under plans	1,570,000	222,000	1,842,000																											1,700,000	4,200,000	3,100,000
Defined Benefit Pension Plan, Liabilities																														0			2,500,000
Contribution of pension fund in excess of total contribution					5.00%	5.00%	5.00%
Percentage of funded under multi employer plans								0.00%
Percentage of funded under multi employer plans																							Less than 65 percent	Between 65 and less than 80 percent	At least 80 percent
Total cost and employer contributions	$ 20,300,000	$ 18,200,000	$ 17,200,000
Date of acquisition	May 20, 2011