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Commitments and Contingencies - Additional Information (Detail)
6 Months Ended 12 Months Ended
Jun. 30, 2019
USD ($)
Product
Jul. 01, 2018
Product
Dec. 30, 2018
USD ($)
Loss Contingencies [Line Items]      
Letters of credit totaled $ 35,600,000   $ 35,600,000
Long-term marketing contractual arrangements $ 198,000,000.0    
Southeastern [Member]      
Loss Contingencies [Line Items]      
Purchase requirements of plastic bottles 80.00%    
SAC [Member]      
Loss Contingencies [Line Items]      
Cases of finished product obligated to purchase on an annual basis | Product 17,500,000    
Purchased number of cases finished product from SAC | Product 14,300,000 15,000,000.0  
Debt guarantee for related party $ 23,900,000   23,900,000
Guaranteed portion of SAC's and Southeastern's debt, collateral held The Company holds no assets as collateral against the SAC guarantee    
Impairment of investments $ 0   $ 0