Cost Reduction Actions - Restructuring Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Restructuring charges:
Restructuring charges			$ 52.6
Other expense, net
Restructuring charges:
Restructuring charges	$ 10.9	$ 3.3	52.6	$ 21.5
Label and Graphic Materials | Other expense, net
Restructuring charges:
Restructuring charges	1.4	1.2	27.6	13.9
Retail Branding and Information Solutions | Other expense, net
Restructuring charges:
Restructuring charges	2.9	1.2	16.6	3.4
Industrial and Healthcare Materials | Other expense, net
Restructuring charges:
Restructuring charges	$ 6.6	$ 0.9	8.6	$ 4.2
Corporate Segment | Other expense, net
Restructuring charges:
Restructuring charges			$ (0.2)