Asset Allocation for Company-Sponsored Pension Plans and Target Allocations by Asset Category (Detail)	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Total target allocation	100.00%
Allocation of Plan Assets	100.00%	100.00%
Equities Securities | Pension Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Target allocation for 2014	65.00%
Allocation of Plan Assets	64.00%	51.00%
Debt Securities | Pension Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Target allocation for 2014	20.00%
Allocation of Plan Assets	22.00%	35.00%
Other | Pension Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Target allocation for 2014	15.00%
Allocation of Plan Assets	14.00%	14.00%