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Revenue Recognition - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2025	Sep. 29, 2024	Sep. 28, 2025	Sep. 29, 2024
Disaggregation of Revenue [Line Items]
Revenue	$ 2,131,108	$ 1,354,652	$ 5,750,777	$ 3,942,089
United States
Disaggregation of Revenue [Line Items]
Revenue	973,656	950,211	2,768,455	2,709,174
EMEA
Disaggregation of Revenue [Line Items]
Revenue	978,907	214,233	2,464,220	644,059
Canada
Disaggregation of Revenue [Line Items]
Revenue	24,266	26,937	77,282	85,646
APAC
Disaggregation of Revenue [Line Items]
Revenue	62,914	80,681	184,243	240,033
Other
Disaggregation of Revenue [Line Items]
Revenue	91,365	82,590	256,577	263,177
Operating Segments | Consumer Packaging
Disaggregation of Revenue [Line Items]
Revenue	1,438,246	662,297	3,731,872	1,827,018
Operating Segments | Industrial Paper Packaging
Disaggregation of Revenue [Line Items]
Revenue	584,969	585,082	1,730,917	1,778,912
Operating Segments | United States | Consumer Packaging
Disaggregation of Revenue [Line Items]
Revenue	508,058	504,236	1,423,239	1,356,318
Operating Segments | United States | Industrial Paper Packaging
Disaggregation of Revenue [Line Items]
Revenue	374,048	355,492	1,104,974	1,073,073
Operating Segments | EMEA | Consumer Packaging
Disaggregation of Revenue [Line Items]
Revenue	873,751	107,143	2,148,101	313,823
Operating Segments | EMEA | Industrial Paper Packaging
Disaggregation of Revenue [Line Items]
Revenue	89,990	91,138	271,130	285,266
Operating Segments | Canada | Consumer Packaging
Disaggregation of Revenue [Line Items]
Revenue	4,579	3,968	12,849	12,491
Operating Segments | Canada | Industrial Paper Packaging
Disaggregation of Revenue [Line Items]
Revenue	19,687	22,969	64,433	73,155
Operating Segments | APAC | Consumer Packaging
Disaggregation of Revenue [Line Items]
Revenue	23,768	24,221	72,082	71,975
Operating Segments | APAC | Industrial Paper Packaging
Disaggregation of Revenue [Line Items]
Revenue	38,778	55,888	111,196	166,774
Operating Segments | Other | Consumer Packaging
Disaggregation of Revenue [Line Items]
Revenue	28,090	22,729	75,601	72,411
Operating Segments | Other | Industrial Paper Packaging
Disaggregation of Revenue [Line Items]
Revenue	62,466	59,595	179,184	180,644
All Other
Disaggregation of Revenue [Line Items]
Revenue	107,893	107,273	287,988	336,159
All Other | United States
Disaggregation of Revenue [Line Items]
Revenue	91,550	90,483	240,242	279,783
All Other | EMEA
Disaggregation of Revenue [Line Items]
Revenue	15,166	15,952	44,989	44,970
All Other | Canada
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
All Other | APAC
Disaggregation of Revenue [Line Items]
Revenue	368	572	965	1,284
All Other | Other
Disaggregation of Revenue [Line Items]
Revenue	$ 809	$ 266	$ 1,792	$ 10,122

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