Condensed Consolidated Statements of Income (Loss) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 17, 2021	Jul. 11, 2020	Jul. 17, 2021	Jul. 11, 2020
Income Statement [Abstract]
Sales	$ 1,017,309	$ 1,025,861	$ 2,319,477	$ 2,375,305
Materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately below)	504,062	506,033	1,147,638	1,176,906
Selling, distribution and administrative expenses	407,707	396,904	909,680	918,939
Depreciation and amortization	31,619	33,180	73,005	77,843
Loss on inferior ingredients			122
Restructuring and related impairment charges		10,535		10,535
Income from operations	73,921	79,209	189,032	191,082
Interest expense	6,556	9,001	18,237	20,640
Interest income	(5,486)	(6,132)	(12,966)	(14,457)
Loss on extinguishment of debt			16,149
Pension plan settlement and curtailment loss				116,207
Other components of net periodic pension and postretirement benefits (credit) expense	(93)	(72)	(218)	71
Income before income taxes	72,944	76,412	167,830	68,621
Income tax expense	16,586	18,493	39,817	16,474
Net income	$ 56,358	$ 57,919	$ 128,013	$ 52,147
Basic:
Net income per common share	$ 0.27	$ 0.27	$ 0.60	$ 0.25
Weighted average shares outstanding	211,932	211,780	211,908	211,766
Diluted:
Net income per common share	$ 0.26	$ 0.27	$ 0.60	$ 0.25
Weighted average shares outstanding	213,056	212,284	212,897	212,192
Cash dividends paid per common share	$ 0.2100	$ 0.2000	$ 0.4100	$ 0.3900