Segments - Schedule of Net Sales, Net Income, and Significant Expenses (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 28, 2024	Dec. 30, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net sales		$ 5,103,487	$ 5,090,830	$ 4,805,822
Total materials, supplies, labor and other production costs (exclusive of depreciation and amortization)		2,577,220	2,632,136	2,501,995
Total selling, distribution, and administrative expenses		2,001,052	2,119,718	1,850,594
Depreciation		127,577	117,788	108,500
Amortization		31,373	32,218	31,752
Right-of-use financing lease amortization		260	1,703	1,705
Plant closure costs and impairment of assets		10,310	7,298	7,825
Restructuring charges		7,403	7,099
FASTER Act, net of recovery on inferior ingredients				236
Interest expense		37,129	36,609	28,921
Interest income		(17,506)	(20,577)	(23,644)
Other components of net periodic pension and postretirement benefits credit		(273)	(269)	(773)
Income before income taxes		328,942	157,107	298,711
Income tax expense		80,826	33,691	70,317
Net income		248,116	123,416	228,394
Ingredients
Segment Reporting Information [Line Items]
Total materials, supplies, labor and other production costs (exclusive of depreciation and amortization)		1,313,585	1,430,136	1,327,192
Workforce-related Costs
Segment Reporting Information [Line Items]
Total materials, supplies, labor and other production costs (exclusive of depreciation and amortization)		747,612	702,036	661,651
Packaging
Segment Reporting Information [Line Items]
Total materials, supplies, labor and other production costs (exclusive of depreciation and amortization)		188,481	197,748	201,878
Other
Segment Reporting Information [Line Items]
Total materials, supplies, labor and other production costs (exclusive of depreciation and amortization)	[1]	327,542	302,216	311,274
Workforce-related Costs
Segment Reporting Information [Line Items]
Total selling, distribution, and administrative expenses		616,013	562,982	520,821
Distributor Distribution Fees
Segment Reporting Information [Line Items]
Total selling, distribution, and administrative expenses		678,385	715,561	700,702
Other
Segment Reporting Information [Line Items]
Total selling, distribution, and administrative expenses	[2]	$ 706,654	$ 841,175	$ 629,071

[1] The Other line item includes utilities, repairs and maintenance, rent, and other production costs.

[2] The Other line item includes transportation, marketing, legal, consulting, rent, computer maintenance, and other overhead expenses.