Restructuring Activities - Additional Information (Detail) $ in Thousands							3 Months Ended	12 Months Ended
		Sep. 25, 2017 Employee	Sep. 07, 2017	Aug. 09, 2017	Jul. 17, 2017	May 03, 2017 BusinessUnit	Dec. 29, 2018 USD ($)	Dec. 29, 2018 USD ($)	Dec. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Restructuring Cost And Reserve [Line Items]
Number of new organizational structure business units established | BusinessUnit						2
Restructuring and related impairment charges	[1]							$ 9,767	$ 104,130
Impairment charge of long-lived assets held for use								7,300		$ 9,900
Property plant and equipment impairment								200
Severance costs									2,000
Property, Plant and Equipment
Restructuring Cost And Reserve [Line Items]
Restructuring and related impairment charges								3,817
Property plant and equipment impairment								3,516
Property, Plant and Equipment | DSD Segment
Restructuring Cost And Reserve [Line Items]
Restructuring and related impairment charges								2,952
Property, Plant and Equipment | Warehouse Segment
Restructuring Cost And Reserve [Line Items]
Restructuring and related impairment charges								865
Reorganization Costs
Restructuring Cost And Reserve [Line Items]
Restructuring and related impairment charges	[1]							$ 4,209	1,925
Bakery Closing | DSD Segment | Brattleboro, Vermont
Restructuring Cost And Reserve [Line Items]
Impairment charge of long-lived assets held for use							$ 500
Bakery Closing | Property, Plant and Equipment | DSD Segment | Brattleboro, Vermont
Restructuring Cost And Reserve [Line Items]
Facility closure cost							2,500
Facility Closing | Warehouse Segment
Restructuring Cost And Reserve [Line Items]
Property plant and equipment impairment							700
Facility Closing | Warehouse Segment | Winston-Salem, North Carolina
Restructuring Cost And Reserve [Line Items]
Facility closure cost									4,400
Closure of operations, description								On August 9, 2017, the company announced the closure of a Warehouse Segment snack cake plant in Winston-Salem, North Carolina. The bakery will close in November 2017. The closure costs were $4.4 million and consisted of $3.4 million for property, plant and equipment impairments and $1.0 million for employee termination benefits. These amounts are recorded in the restructuring and related impairment charges line item on our Consolidated Statements of Income.
Closing date of bakery				Nov. 30, 2017
Employee termination benefits									1,000
Facility Closing | Warehouse Segment | Winston-Salem, North Carolina | Spare Parts
Restructuring Cost And Reserve [Line Items]
Facility closure cost							$ 200
Facility Closing | Property, Plant and Equipment | Warehouse Segment | Winston-Salem, North Carolina
Restructuring Cost And Reserve [Line Items]
Property plant and equipment impairment									3,400
Launch of Project Centennial
Restructuring Cost And Reserve [Line Items]
Restructuring activities, expected completion year								2021
Packaging impairment charge								$ 1,500
Launch of Project Centennial | Reduce Costs to Fuel Growth
Restructuring Cost And Reserve [Line Items]
Non-restructuring consulting costs								$ 9,700	37,300	$ 6,300
Launch of Project Centennial | Develop Leading Capabilities
Restructuring Cost And Reserve [Line Items]
Number of new organizational structure business units established | BusinessUnit						2
Full implementation expected to be completed period								beginning of fiscal 2019.
Launch of Project Centennial | Employee Severance | Voluntary Employee Separation Incentive Plan
Restructuring Cost And Reserve [Line Items]
Voluntary employee separation incentive plan commencement date					Jul. 17, 2017
Election period closing date		Sep. 25, 2017
Approximate number of employees accepted offer | Employee		325
Separations beginning date			Sep. 07, 2017
Restructuring charge paid								$ 24,200	4,600
Launch of Project Centennial | Employee Severance | Restructuring Charges | Voluntary Employee Separation Incentive Plan
Restructuring Cost And Reserve [Line Items]
Aggregate employee separation charge									$ 29,700
Credit included in aggregate employee separation charge								600
Launch of Project Centennial | Reinvigorate Core Business | Restructuring Charges
Restructuring Cost And Reserve [Line Items]
Impairment charges of trademark assets								$ 66,200

[1] Presented on our Consolidated Statements of Income.