Employee Retirement and Profit Sharing Plans - Summary of Assumptions Used to Determine Net Periodic Benefit Cost (Detail) - Pension Plan	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Effective discount rate for benefit obligations	4.53%	4.08%	4.90%
Effective rate for interest on benefit obligations	3.76%	4.08%	4.90%
Effective discount rate for service cost	4.67%	4.08%	4.90%
Effective rate for interest on service cost	4.14%	4.08%	4.90%
Expected return on assets	6.75%	7.00%	7.00%
Rate of compensation increase	4.00%	4.00%	4.00%