Segment Reporting - Segment Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Oct. 01, 2023	Oct. 02, 2022	Oct. 01, 2023	Oct. 02, 2022
Segment Reporting Information [Line Items]
Net sales	$ 1,710,419	$ 1,890,216	$ 5,145,492	$ 5,574,530
Operating profit	162,937	181,942	580,444	548,480
Restructuring/Asset impairment charges	(18,110)	(20,652)	(52,981)	(43,357)
Amortization of Intangible Assets	(21,379)	(20,690)	(63,082)	(60,361)
Other operating income/(charges), net	(10,120)	(1,807)	59,602	(83,838)
Intersegment sales
Segment Reporting Information [Line Items]
Net sales	7,726	38,131	91,749	114,016
Operating Segments \| Consumer Packaging
Segment Reporting Information [Line Items]
Net sales	938,407	1,030,549	2,771,290	2,888,630
Operating profit	112,038	127,859	299,083	440,889
Operating Segments \| Consumer Packaging \| Intersegment sales
Segment Reporting Information [Line Items]
Net sales	2,794	1,663	7,269	5,189
Operating Segments \| Industrial Paper Packaging
Segment Reporting Information [Line Items]
Net sales	580,035	661,452	1,781,033	2,087,981
Operating profit	75,006	81,859	256,413	248,721
Operating Segments \| Industrial Paper Packaging \| Intersegment sales
Segment Reporting Information [Line Items]
Net sales	3,032	33,936	77,163	101,072
All Other
Segment Reporting Information [Line Items]
Net sales	191,977	198,215	593,169	597,919
Operating profit	25,502	15,373	81,409	46,426
All Other \| Intersegment sales
Segment Reporting Information [Line Items]
Net sales	$ 1,900	$ 2,532	$ 7,317	$ 7,755

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The net result for the period of deducting operating expenses from operating revenues.

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