Employee Retirement and Profit Sharing Plans - Schedule of Information Regarding Participation in Multiemployer Pension Plans Footnotes (Detail)	12 Months Ended
	Dec. 31, 2014 Agreement
Western Conference of Teamsters Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Collective bargaining agreements	18
Percentage of agreements representing total employee participants	25.00%
Central States Southeast And Southwest Areas Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Collective bargaining agreements	21
Central States Southeast And Southwest Areas Pension Plan | Agreements Expiring in 2015
Defined Benefit Plan Disclosure [Line Items]
Percentage of agreements representing total employee participants	17.00%
Central States Southeast And Southwest Areas Pension Plan | Agreements Expiring in 2016
Defined Benefit Plan Disclosure [Line Items]
Percentage of agreements representing total employee participants	69.00%
Central States Southeast And Southwest Areas Pension Plan | Agreements Expiring in 2017
Defined Benefit Plan Disclosure [Line Items]
Percentage of agreements representing total employee participants	14.00%
Retail Wholesale Department Store International Union And Industry Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Collective bargaining agreements	8
Retail Wholesale Department Store International Union And Industry Pension Fund | Agreements Expiring in 2015
Defined Benefit Plan Disclosure [Line Items]
Percentage of agreements representing total employee participants	50.00%
Retail Wholesale Department Store International Union And Industry Pension Fund | Agreements Expiring in 2016
Defined Benefit Plan Disclosure [Line Items]
Percentage of agreements representing total employee participants	4.00%
Retail Wholesale Department Store International Union And Industry Pension Fund | Agreements Expiring in 2017
Defined Benefit Plan Disclosure [Line Items]
Percentage of agreements representing total employee participants	46.00%
Dairy Industry Union Pension Plan For Philadelphia Vicinity
Defined Benefit Plan Disclosure [Line Items]
Collective bargaining agreements	4
Dairy Industry Union Pension Plan For Philadelphia Vicinity | Maximum
Defined Benefit Plan Disclosure [Line Items]
Percentage of agreements representing total employee participants	69.00%