Weighted Average Assumptions used to Determine Benefit obligations (Detail)	Dec. 29, 2012	Dec. 31, 2011
United States Pension Plans of US Entity, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.75%	4.72%
Foreign Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Discount rate	6.09%	6.51%
Rate of compensation increase	4.69%	5.01%
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.23%	5.13%