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Goodwill and Other Intangible Assets - Changes in Goodwill by Segment (Details) $ in Thousands	3 Months Ended
	Apr. 04, 2021 USD ($)
Goodwill [Roll Forward]
Goodwill at December 31, 2020	$ 1,389,255	[1]
Dispositions	(53,039)
Foreign currency translation	(9,514)
Measurement period adjustments	1,512
Goodwill at April 4, 2021	1,328,214
Consumer Packaging
Goodwill [Roll Forward]
Goodwill at December 31, 2020	592,310
Dispositions	0
Foreign currency translation	(4,536)
Goodwill at April 4, 2021	589,286
Industrial Paper Packaging
Goodwill [Roll Forward]
Goodwill at December 31, 2020	317,958
Dispositions	0
Foreign currency translation	(4,286)
Measurement period adjustments	0
Goodwill at April 4, 2021	313,672
All Other
Goodwill [Roll Forward]
Goodwill at December 31, 2020	478,987
Dispositions	(53,039)
Foreign currency translation	(692)
Measurement period adjustments	0
Goodwill at April 4, 2021	$ 425,256
[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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