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Financial Results that Impact Comparability by Quarter (Detail) - USD ($) $ in Thousands	3 Months Ended					4 Months Ended		12 Months Ended
	Jan. 01, 2022	Oct. 09, 2021	Jan. 02, 2021	Oct. 03, 2020	Jul. 11, 2020	Apr. 24, 2021	Apr. 18, 2020	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Quarterly Financial Information Disclosure [Abstract]
Loss (recovery) on inferior ingredients	$ 1,772	$ (950)	$ 107			$ 122		$ 944	$ 107	$ (37)
Multi-employer pension plan withdrawal costs		$ 3,300						3,300
Restructuring and related impairment charges			4,848	$ 20,100	$ 10,535				35,483	$ 23,524
Pension plan settlement and curtailment loss (gain)	$ 403		$ (297)	$ (7,153)			$ 116,207	$ 403	$ 108,757

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- Definition

Loss (recovery) on inferior ingredients.

+ References

No definition available.

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- Definition

Total costs to withdrawal from multi-employer pension plan.

+ References

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- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit from settlement and curtailment.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)(7)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)(7)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 45
-Paragraph 3A
-URI http://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919

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- Definition

Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

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