v3.25.2
Segment Reporting - Schedule of Segment Financial Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 29, 2025
Jun. 30, 2024
Jun. 29, 2025
Jun. 30, 2024
Segment Reporting Information [Line Items]        
Sales from reportable segments $ 1,844,342 $ 1,212,758 $ 3,498,428 $ 2,417,679
Other sales 96,341 96,839 182,630 232,536
Total consolidated sales 1,910,441 1,278,801 3,619,669 2,587,437
Cost of sales (1,504,164) (993,558) (2,859,705) (2,031,029)
Segment operating profit 175,667 95,811 302,527 168,383
Other segment disclosures:        
Equity in earnings of affiliates, net of tax 2,270 2,274 4,191 3,411
Depreciation and amortization     250,967 180,045
Consumer Packaging        
Segment Reporting Information [Line Items]        
Sales from reportable segments 1,229,581 585,101 2,298,943 1,168,545
Industrial Paper Packaging        
Segment Reporting Information [Line Items]        
Sales from reportable segments 614,761 627,657 1,199,485 1,249,134
Operating Segments        
Segment Reporting Information [Line Items]        
Sales from reportable segments 1,815,272 1,183,821 3,439,574 2,358,551
Segment operating profit 241,584 140,714 453,479 265,125
Other segment disclosures:        
Equity in earnings of affiliates, net of tax 2,270 2,274 4,191 3,411
Operating Segments | Consumer Packaging        
Segment Reporting Information [Line Items]        
Sales from reportable segments 1,227,033 583,051 2,293,626 1,164,721
Total consolidated sales 1,227,033 583,051 2,293,626 1,164,721
Cost of sales (989,484) (462,567) (1,843,216) (942,057)
Other segment items (79,744) (48,778) (154,603) (94,165)
Segment operating profit 160,353 73,756 301,124 132,323
Other segment disclosures:        
Equity in earnings of affiliates, net of tax 170 35 119 47
Depreciation and amortization 52,801 25,232 101,756 50,129
Operating Segments | Industrial Paper Packaging        
Segment Reporting Information [Line Items]        
Sales from reportable segments 588,239 600,770 1,145,948 1,193,830
Total consolidated sales 588,239 600,770 1,145,948 1,193,830
Cost of sales (442,971) (466,337) (864,954) (925,471)
Other segment items (90,559) (94,362) (182,176) (190,861)
Segment operating profit 81,231 66,958 152,355 132,802
Other segment disclosures:        
Equity in earnings of affiliates, net of tax 2,100 2,239 4,072 3,364
Depreciation and amortization 29,838 28,641 58,171 57,144
Intersegment Eliminations        
Segment Reporting Information [Line Items]        
Sales from reportable segments 29,070 28,937 58,854 59,128
Total consolidated sales (30,242) (30,796) (61,389) (62,778)
Intersegment Eliminations | Consumer Packaging        
Segment Reporting Information [Line Items]        
Sales from reportable segments 2,548 2,050 5,317 3,824
Intersegment Eliminations | Industrial Paper Packaging        
Segment Reporting Information [Line Items]        
Sales from reportable segments $ 26,522 $ 26,887 $ 53,537 $ 55,304