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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. 28, 2019 USD ($) | Oct. 05, 2019 USD ($) | Jul. 13, 2019 USD ($) | Dec. 29, 2018 USD ($) | Oct. 06, 2018 USD ($) | Jul. 14, 2018 USD ($) | Apr. 20, 2019 USD ($) | Apr. 21, 2018 USD ($) | Dec. 28, 2019 USD ($) | Dec. 29, 2018 USD ($) Segment | Dec. 30, 2017 USD ($)
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  | $ 917,759,000 | $ 966,561,000 | $ 975,759,000 | $ 880,667,000 | $ 923,449,000 | $ 941,283,000 | $ 1,263,895,000 | $ 1,206,453,000 | $ 4,123,974,000 | $ 3,951,852,000 | $ 3,920,733,000
Deferred gain on sale of assets held for sale |  |  | 30,200,000 |  |  | 35,700,000 |  |  |  |  | 30,200,000 | 35,700,000 |
Net gain on sale of distribution rights |  |  |  |  |  |  |  |  |  |  | 4,100,000 | 4,400,000 | 3,300,000
Equipment held under capital leases |  |  |  |  |  | 35,400,000 |  |  |  |  |  | 35,400,000 |
Total accumulated depreciation for assets held under capital leases |  |  |  |  |  | 13,400,000 |  |  |  |  |  | 13,400,000 |
Capitalized interest |  |  | 0 |  |  | 0 |  |  |  |  | $ 0 | 0 | 0
Lessee, operating lease, existence of residual value guarantees |  |  |  |  |  |  |  |  |  |  | false |  |
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. |  |
Increase in lease assets and liabilities, net |  |  |  |  |  |  |  |  |  |  | $ 9,100,000 |  |
Finance lease modifications |  |  |  |  |  |  |  |  |  |  | 0 |  |
Financing ROU assets |  |  | 22,829,000 |  |  |  |  |  |  |  | 22,829,000 |  |
Financing right-of-use lease liabilities |  |  | 27,566,000 |  |  |  |  |  |  |  | 27,566,000 |  |
Property, plant and equipment, net |  |  | 717,822,000 |  |  | 743,847,000 |  |  |  |  | 717,822,000 | $ 743,847,000 |
Number of operating segments | Segment |  |  |  |  |  |  |  |  |  |  |  | 2 |
Impairment charges |  |  |  |  |  |  |  |  |  |  | $ 21,062,000 | $ 5,593,000 | $ 69,601,000
Asset impairment charges |  |  |  |  |  |  |  |  |  |  |  | 5,999,000 |
Finite-lived intangible asset amortization periods |  |  |  |  |  |  |  |  |  |  | 33 years |  | 30 years
Goodwill impairment loss |  |  |  |  |  |  |  |  |  |  | $ 0 | 0 | $ 0
Advertising and marketing costs |  |  |  |  |  |  |  |  |  |  | 48,200,000 | 40,500,000 | 33,800,000
Capitalized software development costs |  |  | 29,600,000 |  |  | 23,500,000 |  |  |  |  | 29,600,000 | 23,500,000 |
Amortization expense of capitalized software development costs |  |  |  |  |  |  |  |  |  |  | $ 10,200,000 | $ 8,000,000.0 | $ 4,100,000
Corporate income tax rate |  |  |  |  |  |  |  |  |  |  | 21.00% | 21.00% | 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 |  |  | 803,750,000 |  |  | 808,750,000 |  |  |  |  | $ 803,750,000 | $ 808,750,000 |
Research and development costs |  |  |  |  |  |  |  |  |  |  | 4,300,000 | 4,900,000 | $ 2,400,000
3.5% Senior Notes Due 2026 |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face amount | $ 400,000,000.0 |  | 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 |  | $ 400,000,000.0 | 400,000,000 |  |  | 400,000,000 |  |  |  |  | 400,000,000 | 400,000,000 |
Debt instrument discount and issuance cost amortization period |  | 10 years |  |  |  |  |  |  |  |  |  |  |
Trademarks |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring impairment charges of indefinite intangible assets |  |  |  |  |  |  |  |  |  |  | $ 15,400,000 | 0 | 66,200,000
Property, Plant and Equipment |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  |  |  |  |  |  |  |  |  | 3,516,000 |
Facility Closing |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  |  |  | 700,000 |  |  |  |  |  |  |
Manufacturing Lines |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment charges |  |  |  |  |  |  |  |  | $ 400,000 |  |  |  |
Closed Plant |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of assets held for sale |  |  |  | 1,900,000 |  |  |  |  |  |  |  |  |
Gain at time of sale |  |  |  | 800,000 |  |  |  |  |  |  |  |  |
Winston-Salem, North Carolina | Closed Plant |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment charges |  |  |  |  | $ 1,300,000 |  |  |  |  |  |  |  |
Additional impairment charge of spare parts write-offs |  |  |  | 200,000 |  |  |  |  |  |  |  |  |
Opelika, Alabama | Closed Plant |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment charges |  |  |  | 3,900,000 |  |  |  |  |  |  |  |  |
Brattleboro, Vermont | Bakery Closing |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment charge of long-lived assets held for use |  |  |  |  |  | 500,000 |  |  |  |  |  |  |
Brattleboro, Vermont | Bakery Closing | Property, Plant and Equipment |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Facility closure cost |  |  |  |  |  | 2,500,000 |  |  |  |  |  |  |
Brattleboro, Vermont | Spare Parts | Bakery Closing |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Facility closure cost |  |  |  |  |  | 200,000 |  |  |  |  |  |  |
Winston-Salem, North Carolina | Facility Closing |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Facility closure cost |  |  |  |  |  |  |  |  |  |  |  |  | 4,400,000
Winston-Salem, North Carolina | Facility Closing | Property, Plant and Equipment |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Asset impairment charges |  |  |  |  |  |  |  |  |  |  |  |  | 3,400,000
Winston-Salem, North Carolina | Closed Plant |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Additional impairment charge of spare parts write-offs |  |  |  | $ 200,000 |  |  |  |  |  |  |  |  |
Winston-Salem, North Carolina | Spare Parts | Facility Closing |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Facility closure cost |  |  |  |  |  | 200,000 |  |  |  |  |  |  |
Bakery Equipment |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Lessee, operating lease term |  |  |  |  |  |  |  |  |  |  | less than a year up to nine years |  |
Transportation Equipment |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Lessee, operating lease term |  |  |  |  |  |  |  |  |  |  | less than one year up to eleven years |  |
IT Equipment |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Lessee, operating lease term |  |  |  |  |  |  |  |  |  |  | less than a year up to five years |  |
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, existence of residual value guarantees |  |  |  |  |  |  |  |  |  |  | false |  |
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. |  |
Short Term Leases |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Lessee, operating lease, existence of residual value guarantees |  |  |  |  |  |  |  |  |  |  | false |  |
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, purchase options |  |  |  |  |  |  |  |  |  |  | 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. |  |
Embedded Financing Truck And Trailer Leases |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Financing ROU assets |  |  | 16,100,000 |  |  |  |  |  |  |  | $ 16,100,000 |  |
Financing right-of-use lease liabilities |  |  | 20,900,000 |  |  |  |  |  |  |  | 20,900,000 |  |
Property, plant and equipment, net |  |  |  |  |  | $ 21,900,000 |  |  |  |  |  | 21,900,000 |
Embedded Financing I T Equipment |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Financing ROU assets |  |  | 5,700,000 |  |  |  |  |  |  |  | 5,700,000 |  |
Financing right-of-use lease liabilities |  |  | $ 5,800,000 |  |  |  |  |  |  |  | $ 5,800,000 |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Lessee, operating lease term |  |  | 1 year |  |  |  |  |  |  |  | 1 year |  |
Lessee, operating lease renewal term |  |  | 1 month |  |  |  |  |  |  |  | 1 month |  |
Finite-lived intangible asset amortization periods |  |  |  |  |  |  |  |  |  |  | 2 years |  |
Minimum | Trademarks |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible asset amortization periods |  |  |  |  |  |  |  |  |  |  | 30 years |  |
Minimum | Short Term Leases |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Lessee, operating lease term |  |  | 1 month |  |  |  |  |  |  |  | 1 month |  |
Minimum | Capitalized Software Development Costs |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful life, years |  |  |  |  |  |  |  |  |  |  | 3 years |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Lessee, operating lease term |  |  | 26 years |  |  |  |  |  |  |  | 26 years |  |
Lessee, operating lease renewal term |  |  | 10 years |  |  |  |  |  |  |  | 10 years |  |
Finite-lived intangible asset amortization periods |  |  |  |  |  |  |  |  |  |  | 40 years |  |
Maximum | Trademarks |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible asset amortization periods |  |  |  |  |  |  |  |  |  |  | 40 years |  |
Maximum | Bakery Equipment |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Lessee, operating lease term |  |  | 9 years |  |  |  |  |  |  |  | 9 years |  |
Maximum | Transportation Equipment |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Lessee, operating lease term |  |  | 11 years |  |  |  |  |  |  |  | 11 years |  |
Maximum | IT Equipment |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Lessee, operating lease term |  |  | 5 years |  |  |  |  |  |  |  | 5 years |  |
Maximum | Short Term Leases |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Lessee, operating lease term |  |  | 12 months |  |  |  |  |  |  |  | 12 months |  |
Maximum | Capitalized Software Development Costs |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful life, years |  |  |  |  |  |  |  |  |  |  | 8 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 |  |  |  |  |  |  |  |  |  |  | $ 1,010,500,000 | $ 975,100,000 | $ 888,100,000
Customer Concentration Risk | Outstanding Trade Receivables | Wal-Mart/Sam's Club |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  |  |  |  |  |  | 18.90% | 17.80% |
Customer Concentration Risk | Total year to date sales | Top 10 Customers |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  |  |  |  |  |  | 51.00% | 50.30% | 48.50%
Customer Concentration Risk | Total year to date sales | Wal-Mart/Sam's Club |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  |  |  |  |  |  | 21.10% | 20.30% | 20.00%
Scan-Based Trading |  |  |  |  |  |  |  |  |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Sales |  |  |  |  |  |  |  |  |  |  | $ 1,900,000,000 | $ 1,700,000,000 | $ 1,400,000,000

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