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Segment Reporting - Segment Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2022	Apr. 04, 2021
Segment Reporting Information [Line Items]
Net sales	$ 1,770,982	$ 1,353,304
Operating profit	169,061	120,309
Restructuring/Asset impairment charges	(12,142)	(6,846)
Amortization of acquisition intangibles	(18,800)	(12,749)
Other non-base income/(charges), net	(60,790)	(12,512)
Consumer Packaging
Segment Reporting Information [Line Items]
Net sales	868,098	582,753
Industrial Paper Packaging
Segment Reporting Information [Line Items]
Net sales	699,129	565,397
All Other
Segment Reporting Information [Line Items]
Net sales	203,755	205,154
Operating Segments | Consumer Packaging
Segment Reporting Information [Line Items]
Net sales	868,098	582,753
Operating profit	173,609	81,360
Operating Segments | Industrial Paper Packaging
Segment Reporting Information [Line Items]
Net sales	699,129	565,397
Operating profit	72,660	52,299
Operating Segments | All Other
Segment Reporting Information [Line Items]
Net sales	203,755	205,154
Operating profit	14,524	18,757
Intersegment Sales
Segment Reporting Information [Line Items]
Net sales	37,750	31,574
Intersegment Sales | Consumer Packaging
Segment Reporting Information [Line Items]
Net sales	1,411	1,653
Intersegment Sales | Industrial Paper Packaging
Segment Reporting Information [Line Items]
Net sales	33,638	26,896
Intersegment Sales | All Other
Segment Reporting Information [Line Items]
Net sales	$ 2,701	$ 3,025

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