Restructuring Activities - Additional Information (Detail)			3 Months Ended		12 Months Ended
	Jul. 02, 2018 Segment	May 03, 2017 BusinessUnit	Jan. 02, 2021 USD ($)	Jul. 11, 2020 USD ($) Bakery	Dec. 31, 2022 USD ($) Segment	Jan. 01, 2022 USD ($)	Jan. 02, 2021 USD ($) Bakery
Restructuring Cost And Reserve [Line Items]
Number of operating segments | Segment					1
Project centennial costs					$ 0	$ 0	$ 15,548,000	[1]
Impairment charges assets held for sale			$ 1,300,000				$ 23,627,000
Number of closed bakeries reclassified as held for sale | Bakery				3			3
Restructuring and related impairment charges					0	$ 0	$ 23,627,000
RIF
Restructuring Cost And Reserve [Line Items]
Employee severance charges recognized							5,300,000
Bakeries
Restructuring Cost And Reserve [Line Items]
Impairment charges assets held for sale				$ 5,700,000			5,700,000
Spare Parts
Restructuring Cost And Reserve [Line Items]
Impairment charges assets held for sale				700,000			700,000
Impairment of Trademark
Restructuring Cost And Reserve [Line Items]
Impairment charge			1,300,000	4,600,000
Lease Impairment Charges
Restructuring Cost And Reserve [Line Items]
Restructuring and related impairment charges							9,397,000
Lease Termination Charges
Restructuring Cost And Reserve [Line Items]
Restructuring and related impairment charges							4,077,000
Develop Leading Capabilities
Restructuring Cost And Reserve [Line Items]
Number of operating segments | Segment	1
Line and Distribution Depot Closings
Restructuring Cost And Reserve [Line Items]
Impairment charges assets held for sale				$ 600,000
Employee Severance | Voluntary Employee Separation Incentive Plan
Restructuring Cost And Reserve [Line Items]
Employee termination benefits					$ 1,500,000		$ 2,600,000
Launch of Project Centennial
Restructuring Cost And Reserve [Line Items]
Ingredient and packaging impairments			$ 1,200,000
Launch of Project Centennial | Develop Leading Capabilities
Restructuring Cost And Reserve [Line Items]
Number of new organizational structure business units established | BusinessUnit		2

[1] Represents non-restructuring costs and are recorded in the selling, distribution, and administrative expenses line item of our Consolidated Statements of Income.