Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands		3 Months Ended	12 Months Ended
	Apr. 30, 2008 shares	Apr. 02, 2017	Dec. 30, 2018 USD ($)	Dec. 31, 2017 USD ($) Segment Benefit_Plan Vote shares	Jan. 01, 2017 USD ($) shares	Jan. 03, 2016 USD ($) shares
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Bottle and can volume to retail customers				93.00%
Number of operating segments | Segment				4
Number of additional operating segments that do not meet quantitative thresholds for separate reporting | Segment				3
Period of collection of trade account receivable				30 days
Amortization expenses of internal-use software				$ 11,900	$ 10,900	$ 9,300
Percentage of maximum tax benefit				50.00%
Cost of marketing programs and sales incentives				$ 137,300	$ 117,000	$ 71,400
Number of votes per share | Vote				1
Percentage control of total voting power				86.00%
Class B Common Stock is convertible into Common Stock Ratio				one-for-one per share
Anti-dilutive shares | shares				0	0	0
ASU 2017-07 [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Reclassification of service cost from income from operations to other income (expense), net				$ 5,400	$ 3,300
Class B Common Stock [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Performance units authorized | shares	400,000
Common B stock per performance unit | shares	1
Term of performance unit award agreement	10 years
Maximum overall goal achievement factor	100.00%
Annual performance units granted | shares	40,000
Number of votes per share | Vote				20
Selling, Delivery and Administrative Expenses [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Shipping and handling costs				$ 550,900	395,400	$ 277,900
Nonalcoholic Beverages [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Percentage of service revenue				1.00%
Delivery fees in net sales				$ 5,700	6,000	6,300
All Other [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Number of operating segments | Segment				3
Percentage of third party freight revenue				2.00%
Pension Plans [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Number of company-sponsored pension plans | Benefit_Plan				2
Expected service cost				$ 2,553	$ 461	$ 116
Non-service Cost Components of Net Periodic Benefit Cost [Member] | ASU 2017-07 [Member] | Scenario Forecast [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Expected service cost			$ 7,700
Non-service Cost Components of Other Benefit Plan Charges [Member] | ASU 2017-07 [Member] | Scenario Forecast [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Expected service cost			$ 2,700
Distribution Rights [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life		40 years
Minimum [Member] | Distribution Rights [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life				20 years
Minimum [Member] | Customer Relationships [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life				12 years
Maximum [Member] | Distribution Rights [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life				40 years
Maximum [Member] | Customer Relationships [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life				20 years