Restructuring and Asset Impairments - Schedule of Restructuring and Restructuring-Related Asset Impairment Expenses by Type Incurred and by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Sep. 29, 2024	Oct. 01, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related asset impairment charges	$ 8,190	$ 18,110	$ 59,058	$ 52,981
Other asset impairments	0	0	0	0
Restructuring/Asset impairment charges	8,190	18,110	59,058	52,981
Operating Segments | Consumer Packaging
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related asset impairment charges	4,509	9,784	20,597	16,479
Operating Segments | Industrial Paper Packaging
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related asset impairment charges	3,798	6,430	34,138	32,961
All Other
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related asset impairment charges	0	270	1,362	1,188
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related asset impairment charges	(117)	1,626	2,961	2,353
Severance and termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related asset impairment charges	2,649	9,736	26,742	19,370
Asset impairments
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related asset impairment charges	2,501	6,123	22,844	26,122
Other costs
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related asset impairment charges	$ 3,040	$ 2,251	$ 9,472	$ 7,489