Allocation of Plan Assets (Detail) - Europe	Dec. 31, 2016	Dec. 26, 2015
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	100.00%	100.00%
Cash
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	9.00%
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	21.00%	50.00%
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	70.00%	50.00%