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Summary Of Significant Accounting Policies - Additional Information1 (Detail) |  |  |  |  |  |  | 3 Months Ended | 4 Months Ended | 12 Months Ended |
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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 |  |  |

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