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Summary Of Significant Accounting Policies - Additional Information (Detail)			3 Months Ended										4 Months Ended				12 Months Ended
	Sep. 28, 2016 USD ($)	Apr. 03, 2012 USD ($)	Dec. 29, 2018 USD ($)	Oct. 06, 2018 USD ($)	[1]	Jul. 14, 2018 USD ($)	[1]	Dec. 30, 2017 USD ($)	Oct. 07, 2017 USD ($)	[1]	Jul. 15, 2017 USD ($)	[1]	Apr. 21, 2018 USD ($)	[1]	Apr. 22, 2017 USD ($)	[1]	Dec. 29, 2018 USD ($) Segment	Dec. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Significant Accounting Policies [Line Items]
Sales			$ 880,667,000	$ 923,449,000		$ 941,283,000		$ 873,623,000	$ 932,822,000		$ 926,639,000		$ 1,206,453,000		$ 1,187,649,000		$ 3,951,852,000	$ 3,920,733,000	$ 3,926,885,000
Deferred gain on sale of assets held for sale			35,700,000					34,700,000									35,700,000	34,700,000
Net gain on sale of distribution rights																	4,400,000	3,300,000	3,100,000
Equipment held under capital leases			35,400,000					42,800,000									35,400,000	42,800,000
Total accumulated depreciation for assets held under capital leases			13,400,000					15,700,000									13,400,000	15,700,000
Capitalized interest			0					0									0	$ 0	0
Impairment charge of long-lived assets held for use																	7,300,000		9,900,000
Asset impairment charges																	200,000
Finite-lived intangible asset amortization periods																		30 years
Impairment charge of indefinite intangible assets																		$ 18,500,000
Goodwill impairment loss																	$ 0	0	0
Number of operating segments | Segment																	2
Advertising and marketing costs																	$ 40,500,000	33,800,000	33,900,000
Capitalized software development costs			23,500,000					30,500,000									23,500,000	30,500,000
Amortization expense of capitalized software development costs																	$ 8,000,000	$ 4,100,000	$ 3,300,000
Corporate income tax rate																	21.00%	35.00%	35.00%
Reclassify the stranded income tax effects from AOCI to retained earnings																	$ 18,800,000
Plan asset amortization conditional percentage																	10.00%
Debt instrument face amount			808,750,000					812,500,000									$ 808,750,000	$ 812,500,000
Research and development costs																	4,900,000	2,400,000	$ 3,000,000
3.5% Senior Notes Due 2026
Significant Accounting Policies [Line Items]
Debt instrument face amount	$ 400,000,000		400,000,000					400,000,000									400,000,000	400,000,000
Debt instrument discount and issuance cost amortization period	10 years
4.375% Senior Notes Due 2022
Significant Accounting Policies [Line Items]
Debt instrument face amount		$ 400,000,000	400,000,000					$ 400,000,000									$ 400,000,000	400,000,000
Debt instrument discount and issuance cost amortization period		10 years
Selling, Distribution, and Administrative Expense
Significant Accounting Policies [Line Items]
Hedge ineffectiveness																			100,000
Trademarks
Significant Accounting Policies [Line Items]
Finite-lived intangible asset amortization periods																	40 years
Restructuring impairment charges of indefinite intangible assets																		66,200,000
Impairment charge of indefinite intangible assets																	$ 15,000,000		15,000,000
Property, Plant and Equipment
Significant Accounting Policies [Line Items]
Asset impairment charges																	$ 3,516,000
Minimum
Significant Accounting Policies [Line Items]
Finite-lived intangible asset amortization periods																	2 years
Minimum | Capitalized Software Development Costs
Significant Accounting Policies [Line Items]
Estimated useful life, years																	3 years
Minimum | Trademarks
Significant Accounting Policies [Line Items]
Finite-lived intangible asset amortization periods																	30 years
Maximum
Significant Accounting Policies [Line Items]
Finite-lived intangible asset amortization periods																	40 years
Maximum | Capitalized Software Development Costs
Significant Accounting Policies [Line Items]
Estimated useful life, years																	8 years
Maximum | Trademarks
Significant Accounting Policies [Line Items]
Finite-lived intangible asset amortization periods																	40 years
Direct Financing To Distributor | Maximum
Significant Accounting Policies [Line Items]
Notes receivable maturity period																	10 years
Shipping costs
Significant Accounting Policies [Line Items]
Shipping costs																	$ 975,100,000	888,100,000	855,100,000
DSD Segment
Significant Accounting Policies [Line Items]
Sales																	3,340,047,000	3,318,563,000	3,284,177,000
Impairment charge of indefinite intangible assets																		18,500,000
DSD Segment | Bakery Closing | Brattleboro, Vermont
Significant Accounting Policies [Line Items]
Impairment charge of long-lived assets held for use			500,000
DSD Segment | Bakery Closing | Property, Plant and Equipment | Brattleboro, Vermont
Significant Accounting Policies [Line Items]
Facility closure cost			2,500,000
Warehouse Segment
Significant Accounting Policies [Line Items]
Sales																	$ 611,805,000	602,170,000	$ 642,708,000
Warehouse Segment | Facility Closing
Significant Accounting Policies [Line Items]
Asset impairment charges			700,000
Warehouse Segment | Facility Closing | Winston-Salem, North Carolina
Significant Accounting Policies [Line Items]
Facility closure cost																		4,400,000
Warehouse Segment | Facility Closing | Winston-Salem, North Carolina | Spare Parts
Significant Accounting Policies [Line Items]
Facility closure cost			200,000
Warehouse Segment | Facility Closing | Property, Plant and Equipment | Winston-Salem, North Carolina
Significant Accounting Policies [Line Items]
Asset impairment charges																		$ 3,400,000
Customer Concentration Risk | Outstanding Trade Receivables | Wal-Mart/Sam's Club
Significant Accounting Policies [Line Items]
Concentration risk percentage																	17.80%	17.50%
Customer Concentration Risk | Total year to date sales | Top 10 Customers
Significant Accounting Policies [Line Items]
Concentration risk percentage																	50.30%	48.50%	46.80%
Customer Concentration Risk | Total year to date sales | Wal-Mart/Sam's Club
Significant Accounting Policies [Line Items]
Concentration risk percentage																	20.30%	20.00%	19.60%
Customer Concentration Risk | Total year to date sales | Wal-Mart/Sam's Club | DSD Segment
Significant Accounting Policies [Line Items]
Concentration risk percentage																	17.90%	17.60%	17.00%
Customer Concentration Risk | Total year to date sales | Wal-Mart/Sam's Club | Warehouse Segment
Significant Accounting Policies [Line Items]
Concentration risk percentage																	2.40%	2.40%	2.60%
Scan-Based Trading
Significant Accounting Policies [Line Items]
Sales			$ 1,700,000,000															$ 1,400,000,000	$ 1,300,000,000
[1] As disclosed in Note 4, Financial Statement Revisions, the company reported cash receipts and payments for the repurchase and sale of territories and cash paid at issuance of notes receivable at net when these transactions should have been disaggregated. We concluded that the errors were not material to any of these prior periods that were impacted. The error resulted in an understatement of cash flows from operating activities and cash flows used in investing activities of $5.9 million, $12.1 million and $12.8 million, respectively, for the sixteen, twenty-eight, and forty-week amounts included in the first, second, and third quarters of fiscal 2017, respectively.  These amounts were revised upon subsequent presentation of these financial statements.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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Expenses recognized in the period that are directly related to the selling and distribution of products or services.

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