Piedmont Coca-Cola Bottling Partnership - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Minority Interest [Line Items]
Noncontrolling interest income	$ 6,312,000	$ 6,517,000	$ 6,042,000
Noncontrolling interest	$ 92,205,000	$ 85,893,000
Piedmont Coca-Cola Bottling Partnership [Member]
Minority Interest [Line Items]
Minority interest	22.70%
Piedmont Coca-Cola Bottling Partnership [Member] | Financing Agreement Provided from Company to Piedmont [Member]
Minority Interest [Line Items]
Finance under financial agreement	$ 100,000,000
Financial agreement expiration date	Dec. 31, 2019
Automatic renewal period of financial agreement	1 year
Period of prior written notice for cancellation	10 days
Subsidiary's intercompany interest rate over the Company's average rate	0.50%
Amounts outstanding under financing agreement with subsidiary	$ 0
Piedmont Coca-Cola Bottling Partnership [Member] | Financing Agreement Provided form Piedmont to Company [Member]
Minority Interest [Line Items]
Financial agreement expiration date	Dec. 31, 2022
Automatic renewal period of financial agreement	1 year
Financing under agreement	$ 200,000,000
Revolving loan agreement maturity period	30 days
Interest rate percentage over revolving loan agreement	1.47%
Amount outstanding under financing agreement from subsidiary	$ 111,800,000