Quarterly Financial Summary (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 26, 2020	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Net Sales	$ 489.6	$ 477.2	$ 397.4	$ 375.9	$ 417.2	$ 418.1	$ 475.3	$ 487.3	$ 1,740.1	$ 1,797.9	$ 2,069.7
Gross Profit	334.1	325.1	263.9	246.2	263.7	276.6	320.7	326.1	1,169.3	1,187.1	1,377.5
Net income	$ 21.8	$ 34.4	$ 63.8	$ (7.8)	$ (71.7)	$ 7.8	$ 39.4	$ 36.9	$ 112.2	$ 12.4	$ 155.9
Basic earnings per share	$ 0.45	$ 0.70	$ 1.30	$ (0.16)	$ (1.47)	$ 0.16	$ 0.81	$ 0.76	$ 2.29	$ 0.26	$ 3.12
Diluted earnings per share	0.41	0.65	1.30	(0.16)	(1.47)	0.16	0.81	0.76	$ 2.14	0.25	3.11
Cash dividend declared, per share	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0.27	$ 0.27	$ 0.27		$ 0.81	$ 2.72
Goodwill, impairment charge									$ 0.0	$ 17.5
Impairment of trade names									0.0	22.5
Impairment expense		$ 19.7							0.0	40.0	$ 0.0
Restructuring Charges [Member]
Re-engineering and impairment charges	$ 5.8	3.2	$ 23.2	$ 3.9	$ 18.8	$ 7.5	$ 4.1	$ 4.3
Fuller Mexico
Goodwill, impairment charge		17.5
Argentina and Venezuela [Member]
Foreign Currency Transaction Gain (Loss), before Tax	(2.2)	(2.2)	$ (0.3)	$ 0.3	$ (0.5)	$ (0.7)	$ (0.1)	$ (0.3)	$ (4.5)	$ (1.6)
Fuller [Member] | Trademarks and Trade Names
Impairment expense	$ 20.3
Nutrimetics [Member] | Trademarks and Trade Names
Impairment of trade names		$ 2.2