Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jul. 13, 2019	Jul. 14, 2018	Jul. 13, 2019	Jul. 14, 2018
Income Statement [Abstract]
Sales	$ 975,759,000	$ 941,283,000	$ 2,239,654,000	$ 2,147,736,000
Materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately below)	508,552,000	488,871,000	1,160,693,000	1,113,993,000
Selling, distribution and administrative expenses	359,497,000	360,365,000	835,546,000	814,828,000
Depreciation and amortization	33,329,000	35,098,000	78,148,000	79,287,000
Loss (recovery) on inferior ingredients		3,884,000	(413,000)	3,884,000
Impairment of assets				2,483,000
Multi-employer pension plan withdrawal costs				2,322,000
Restructuring and related impairment charges	2,047,000	801,000	2,765,000	2,060,000
Income from operations	72,334,000	52,264,000	162,915,000	128,879,000
Interest expense	9,192,000	8,214,000	21,663,000	19,210,000
Interest income	(6,423,000)	(6,466,000)	(15,070,000)	(14,561,000)
Pension plan settlement loss		1,035,000	0	5,703,000
Other components of net periodic pension and postretirement benefits expense (credit)	519,000	(298,000)	1,211,000	(1,033,000)
Income before income taxes	69,046,000	49,779,000	155,111,000	119,560,000
Income tax expense	15,951,000	4,337,000	36,150,000	22,871,000
Net income	$ 53,095,000	$ 45,442,000	$ 118,961,000	$ 96,689,000
Basic:
Net income per common share	$ 0.25	$ 0.22	$ 0.56	$ 0.46
Weighted average shares outstanding	211,685	211,048	211,517	210,956
Diluted:
Net income per common share	$ 0.25	$ 0.21	$ 0.56	$ 0.46
Weighted average shares outstanding	211,957	211,507	211,924	211,443
Cash dividends paid per common share	$ 0.1900	$ 0.1800	$ 0.3700	$ 0.3500