Goodwill and Other Intangible Assets - Changes in Goodwill by Segment (Details) $ in Thousands	9 Months Ended
	Sep. 29, 2019 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 1,309,167	[1],[2]
2019 Acquisitions	43,722
Foreign currency translation	(7,403)
Other	(215)
Goodwill, ending balance	1,345,271
Consumer Packaging
Goodwill [Roll Forward]
Goodwill, beginning balance	617,332
2019 Acquisitions	0
Foreign currency translation	(3,717)
Other	(2,461)
Goodwill, ending balance	611,154
Display and Packaging
Goodwill [Roll Forward]
Goodwill, beginning balance	203,414
2019 Acquisitions	0
Foreign currency translation	0
Other	0
Goodwill, ending balance	203,414
Paper and Industrial Converted Products
Goodwill [Roll Forward]
Goodwill, beginning balance	256,947
2019 Acquisitions	43,722
Foreign currency translation	(3,374)
Other	2,246
Goodwill, ending balance	299,541
Protective Solutions
Goodwill [Roll Forward]
Goodwill, beginning balance	231,474
2019 Acquisitions	0
Foreign currency translation	(312)
Other	0
Goodwill, ending balance	$ 231,162

[1] The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America.

[2] The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America.