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Goodwill and Other Intangible Assets - Changes in Goodwill by Segment (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Oct. 03, 2021	Jul. 04, 2021	Apr. 04, 2021		Oct. 03, 2021
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 1,333,400	$ 1,328,214	$ 1,389,255	[1]	$ 1,389,255	[1]
2021 Acquisitions	0	917	0
Dispositions	(1,058)	0	(53,039)
Foreign currency translation	(8,619)	4,269	(9,514)
Measurement period adjustments	0	0	1,512
Goodwill, ending balance	1,323,723	1,333,400	1,328,214		1,323,723
Goodwill at December 31, 2020, as reported
Goodwill [Roll Forward]
Goodwill, beginning balance			1,389,255		1,389,255
Adjustment to correct goodwill by segment
Goodwill [Roll Forward]
Goodwill, beginning balance			0		0
Consumer Packaging
Goodwill [Roll Forward]
Goodwill, beginning balance	580,691	578,220	581,244		581,244
2021 Acquisitions	0	0	0
Dispositions	(1,058)	0	0
Foreign currency translation	(4,744)	2,471	(4,536)
Measurement period adjustments	0	0	1,512		1,512
Goodwill, ending balance	574,889	580,691	578,220		574,889
Consumer Packaging | Goodwill at December 31, 2020, as reported
Goodwill [Roll Forward]
Goodwill, beginning balance			592,310		592,310
Consumer Packaging | Adjustment to correct goodwill by segment
Goodwill [Roll Forward]
Goodwill, beginning balance			(11,066)		(11,066)
Industrial Paper Packaging
Goodwill [Roll Forward]
Goodwill, beginning balance	367,274	365,029	369,315		369,315
2021 Acquisitions	0	917	0
Dispositions	0	0	0
Foreign currency translation	(2,911)	1,328	(4,286)
Measurement period adjustments	0	0	0
Goodwill, ending balance	364,363	367,274	365,029		364,363
Industrial Paper Packaging | Goodwill at December 31, 2020, as reported
Goodwill [Roll Forward]
Goodwill, beginning balance			317,958		317,958
Industrial Paper Packaging | Adjustment to correct goodwill by segment
Goodwill [Roll Forward]
Goodwill, beginning balance			51,357		51,357
All Other
Goodwill [Roll Forward]
Goodwill, beginning balance	385,435	384,965	438,696		438,696
2021 Acquisitions	0	0	0
Dispositions	0	0	(53,039)
Foreign currency translation	(964)	470	(692)
Measurement period adjustments	0	0	0
Goodwill, ending balance	$ 384,471	$ 385,435	384,965		384,471
All Other | Goodwill at December 31, 2020, as reported
Goodwill [Roll Forward]
Goodwill, beginning balance			478,987		478,987
All Other | Adjustment to correct goodwill by segment
Goodwill [Roll Forward]
Goodwill, beginning balance			$ (40,291)		$ (40,291)
[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.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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