Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Income Statement [Abstract]
Sales	$ 4,123,974	$ 3,951,852	$ 3,920,733
Materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately below)	2,155,709	2,066,828	2,009,473
Selling, distribution and administrative expenses	1,575,122	1,507,256	1,510,015
Depreciation and amortization	144,228	144,124	146,719
Restructuring and related impairment charges	23,524	9,767	104,130
Gain on divestiture			(28,875)
(Recovery) loss on inferior ingredients	(37)	3,212
Multi-employer pension plan withdrawal costs		2,322	18,268
Impairment of assets		5,999
Income from operations	225,428	212,344	161,003
Interest expense	38,847	35,686	36,557
Interest income	(27,750)	(27,755)	(22,938)
Pension plan settlement loss	0	7,781	4,649
Other components of net periodic pension and postretirement benefits expense (credit)	2,248	(529)	(6,558)
Income before income taxes	212,083	197,161	149,293
Income tax expense (benefit)	47,545	40,001	(827)
Net income	$ 164,538	$ 157,160	$ 150,120
Basic:
Net income per common share	$ 0.78	$ 0.74	$ 0.72
Weighted average shares outstanding	211,606	211,016	209,573
Diluted:
Net income per common share	$ 0.78	$ 0.74	$ 0.71
Weighted average shares outstanding	211,974	211,632	210,435
Cash dividends paid per common share	$ 0.7500	$ 0.7100	$ 0.6700