Quarterly Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Jan. 02, 2021		Sep. 26, 2020		Jun. 27, 2020		Mar. 28, 2020		Dec. 28, 2019		Sep. 28, 2019		Jun. 29, 2019		Mar. 30, 2019		Jan. 02, 2021		Dec. 28, 2019		Dec. 29, 2018
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 729,296		$ 634,525		$ 471,977		$ 677,459		$ 787,626		$ 724,014		$ 761,004		$ 686,802		$ 2,513,257		$ 2,959,446		$ 2,722,931
Gross Profit	255,983		222,749		153,126		250,190		289,678		270,028		286,479		257,312		882,048		1,103,497		1,004,140
Income from operations	93,227		86,672		39,118		105,414		152,030		121,345		139,607		101,061		324,431	[1],[2]	514,043	[1],[2]	445,966	[2]
Net earnings	$ 51,837		$ 60,516		$ 21,162		$ 73,779		$ 108,997		$ 82,020		$ 92,210		$ 69,013		$ 207,294		$ 352,240		$ 317,152
Basic earnings per share (usd per share)	$ 0.94	[3]	$ 1.10	[3]	$ 0.39	[3]	$ 1.33	[3]	$ 1.96	[3]	$ 1.47	[3]	$ 1.66	[3]	$ 1.24	[3]	$ 3.76		$ 6.33	[3]	$ 5.71
Diluted earnings per share (usd per share)	$ 0.94	[3]	$ 1.10	[3]	$ 0.39	[3]	$ 1.33	[3]	$ 1.96	[3]	$ 1.47	[3]	$ 1.66	[3]	$ 1.24	[3]	$ 3.76		$ 6.33	[3]	$ 5.70

[1] Gain on litigation settlement is included in Residential Kitchen and gain on sale of plant is included in Commercial Foodservice.

[2] Restructuring expenses and impairments are included in operating income of the segment to which they pertain. See note 3(f) and 13 for further details.

[3] Sum of quarters may not equal the total for the year due to changes in the number of shares outstanding during the year.