Summary Of Significant Accounting Policies - Additional Information1 (Detail)							3 Months Ended						4 Months Ended		12 Months Ended
	Feb. 12, 2025 USD ($)	Jan. 07, 2025 USD ($)	Feb. 17, 2023 USD ($)	Mar. 09, 2021 USD ($)	Sep. 28, 2016 USD ($)	Apr. 03, 2012	Dec. 30, 2023 USD ($)	Oct. 07, 2023 USD ($)	Dec. 31, 2022 USD ($) Aircraft	Oct. 08, 2022 USD ($)	Jul. 16, 2022 USD ($)	Apr. 03, 2022 USD ($)	Apr. 20, 2024 USD ($)	Apr. 23, 2022 USD ($)	Dec. 28, 2024 USD ($) Segment	Dec. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jul. 15, 2023 USD ($)
Significant Accounting Policies [Line Items]
Lessee, operating lease, residual value guarantees, description															Additionally, these contracts do not contain residual value guarantees, and there are no other restrictions or covenants in the contracts.
Lessee, operating lease, existence of residual value guarantees															false
Financing ROU assets							$ 130,000								$ 166,000	$ 130,000
Financing right-of-use lease liabilities															$ 95,000
Number of operating segments | Segment															1
Asset impairment and equipment relocation charges															$ 10,310,000	9,611,000	$ 3,897,000
Recovery related to the sale of equipment															2,140,000	2,312,000	7,681,000
Restructuring and related impairment charges																0
Impairment charge														$ 1,000,000
Goodwill impairment loss															0	0	0
Advertising and marketing costs															89,100,000	99,300,000	74,600,000
Capitalized software development costs							106,500,000								99,100,000	106,500,000
Amortization expense of capitalized software development costs															18,100,000	14,200,000	10,200,000
Debt instrument face amount							900,000,000								900,000,000	900,000,000
Research and development costs															5,100,000	5,900,000	6,100,000
Business process improvement costs															4,529,000	21,521,000	33,169,000
Proceeds from sale of assets held for sale								$ 1,300,000				$ 1,200,000			700,000
Acquisition related costs										$ 11,600,000					2,008,000	3,712,000	12,518,000
Realized foreign currency exchange losses										8,400,000
Investment in unconsolidated affiliate							5,481,000								1,481,000	5,481,000
Fair value of investment in unconsolidated affiliate															1,500,000
Investment impairment loss							5,500,000						$ 4,000,000
Severance and lease termination charges											$ 1,700,000
Number of aircrafts sold | Aircraft									2
Gain on sale of aircraft									$ 6,100,000
Subsequent Event
Significant Accounting Policies [Line Items]
Impairment charges assets held for sale	$ 6,000,000
Severance costs	$ 8,000,000
Initial Investment
Significant Accounting Policies [Line Items]
Fair value of investment in unconsolidated affiliate											$ 9,000,000
Second Investment
Significant Accounting Policies [Line Items]
Fair value of investment in unconsolidated affiliate																		$ 2,000,000
Papa Pita
Significant Accounting Policies [Line Items]
Total cash purchase price			$ 270,258,000
Business acquisition consideration amount			$ 274,755,000
Acquisition related costs																3,700,000	$ 900,000
Simple Mills
Significant Accounting Policies [Line Items]
Acquisition related costs															2,000,000
Simple Mills | Subsequent Event
Significant Accounting Policies [Line Items]
Total cash purchase price		$ 795,000,000
2031 Notes
Significant Accounting Policies [Line Items]
Debt instrument face amount				$ 500,000,000			500,000,000								500,000,000	500,000,000
Debt instrument discount and issuance cost amortization period				10 years
2026 Notes
Significant Accounting Policies [Line Items]
Debt instrument face amount					$ 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 discount and issuance cost amortization period						10 years
Selling, Distribution and Administrative Expenses
Significant Accounting Policies [Line Items]
Impairment charge																$ 2,300,000
Holsum Bakery
Significant Accounting Policies [Line Items]
Impairment charges assets held for sale										3,800,000
Severance costs										1,700,000
Multi-employer pension plan withdrawal costs										$ 1,300,000			$ 1,400,000
Warehouse Classified as Held for Sale
Significant Accounting Policies [Line Items]
Impairment charge							$ 1,800,000	$ 1,800,000				$ 1,000,000
Bakery Equipment
Significant Accounting Policies [Line Items]
Lessee, operating lease term															less than a year up to five years
Transportation Equipment
Significant Accounting Policies [Line Items]
Lessee, operating lease term															less than one year up to seven years
Baton Rouge, Louisiana Bakery
Significant Accounting Policies [Line Items]
Asset impairment and equipment relocation charges															$ 2,400,000
Severance costs															1,100,000
Cake Distribution Territories Classified as Held for Sale
Significant Accounting Policies [Line Items]
Impairment charge															$ 1,400,000
Certain Equipment and IT Equipment
Significant Accounting Policies [Line Items]
Lessee, operating lease term															shorter than a year
Buildings and Land
Significant Accounting Policies [Line Items]
Lessee, operating lease, residual value guarantees, description															Additionally, these contracts do not contain residual value guarantees, and there are no other restrictions or covenants in the contracts.
Lessee, operating lease, existence of residual value guarantees															false
Short Term Leases
Significant Accounting Policies [Line Items]
Lessee, operating lease, residual value guarantees, description															do not contain residual value guarantees, and there are no other restrictions or covenants in the leases.
Lessee, operating lease, existence of residual value guarantees															false
Lessee, operating lease, option to extend, description															There are no purchase options present, however, there generally are renewals that could extend lease terms for additional periods.
Lessee, operating lease, purchase options															false
ERP Related Software
Significant Accounting Policies [Line Items]
Asset impairment and equipment relocation charges															$ 2,700,000
Recovery related to the sale of equipment															$ 1,300,000
Maximum
Significant Accounting Policies [Line Items]
Lessee, operating lease term															22 years
Lessee, operating lease renewal term															10 years
Finite-lived intangible asset amortization periods															40 years
Maximum | Bakery Equipment
Significant Accounting Policies [Line Items]
Lessee, operating lease term															5 years
Maximum | Transportation Equipment
Significant Accounting Policies [Line Items]
Lessee, operating lease term															7 years
Maximum | Short Term Leases
Significant Accounting Policies [Line Items]
Lessee, operating lease term															12 months
Maximum | Capitalized Software Development Costs
Significant Accounting Policies [Line Items]
Estimated useful life, years															8 years
Minimum
Significant Accounting Policies [Line Items]
Lessee, operating lease term															1 year
Lessee, operating lease renewal term															1 month
Finite-lived intangible asset amortization periods															2 years
Minimum | Short Term Leases
Significant Accounting Policies [Line Items]
Lessee, operating lease term															1 month
Minimum | Capitalized Software Development Costs
Significant Accounting Policies [Line Items]
Estimated useful life, years															3 years