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Related Party Transactions - Additional Information (Detail) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 30, 2017
Sep. 29, 2018
Secondary Offerings      
Related Party Transaction [Line Items]      
Expenses related to shares sold $ 4,000,000    
FMR LLC | Amended and Restated 2016 Term Loan      
Related Party Transaction [Line Items]      
Principal amount     $ 55,000,000
FMR LLC | US Foods Holding Corp      
Related Party Transaction [Line Items]      
Percentage of company's outstanding common stock     10.00%
Sponsor | Follow-on Offerings      
Related Party Transaction [Line Items]      
Proceeds from common stock sales   $ 0