Allocation of Pension Plan Assets by Category (Detail) - North America	Dec. 31, 2016	Dec. 26, 2015
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	10000.00%	10000.00%
Money Market Funds
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	300.00%	200.00%
US Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	1100.00%	900.00%
Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	5000.00%	5700.00%
Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	3600.00%	3100.00%
Other
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets		100.00%