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Commitments and Contingencies - Schedule of Unions Representing Employees and the Expiration Date for Agreements (Detail)
 12 Months Ended
Dec. 29, 2018
Norfolk Virginia [Member]  
Commitments And Contingencies [Line Items]  
Union Locals IBT 822
Expiration Dates 2019-04
Columbus Georgia [Member]  
Commitments And Contingencies [Line Items]  
Union Locals IBT 528
Expiration Dates 2019-09
Grand Rapids Michigan [Member]  
Commitments And Contingencies [Line Items]  
Union Locals IBT 406
Expiration Dates 2019-10
Landover Maryland [Member]  
Commitments And Contingencies [Line Items]  
Union Locals IBT 639
Expiration Dates 2021-02
Lima Ohio [Member]  
Commitments And Contingencies [Line Items]  
Union Locals IBT 908
Expiration Dates 2022-01
Bellefontaine Ohio GTL Truck Lines Inc [Member]  
Commitments And Contingencies [Line Items]  
Union Locals IBT 908
Expiration Dates 2022-02
Bellefontaine Ohio General Merchandise Service Division [Member]  
Commitments And Contingencies [Line Items]  
Union Locals IBT 908
Expiration Dates 2022-02