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Segment Reporting - Segment Financial Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 03, 2021 | Sep. 27, 2020 | Oct. 03, 2021 | Sep. 27, 2020
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 1,415,193 | $ 1,312,314 | $ 4,151,251 | $ 3,861,095
Operating profit | 126,512 | 106,744 | 382,112 | 340,574
Restructuring/Asset impairment charges | (3,488) | (24,149) | (8,889) | (59,633)
Other non-base income/(charges), net | 7,570 | 352 | 294 | (802)
Consumer Packaging |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 598,969 | 546,208 | 1,779,525 | 1,659,943
Industrial Paper Packaging |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 635,230 | 490,369 | 1,809,159 | 1,447,886
All Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 180,994 | 275,737 | 562,567 | 753,266
Operating Segments | Consumer Packaging |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 598,969 | 546,208 | 1,779,525 | 1,659,943
Operating profit | 60,918 | 64,370 | 196,341 | 212,575
Operating Segments | Industrial Paper Packaging |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 635,230 | 490,369 | 1,809,159 | 1,447,886
Operating profit | 53,343 | 41,035 | 161,414 | 133,871
Operating Segments | All Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 180,994 | 275,737 | 562,567 | 753,266
Operating profit | 8,169 | 25,136 | 32,952 | 54,563
Intersegment Sales |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 31,901 | 27,261 | 94,514 | 82,687
Intersegment Sales | Consumer Packaging |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 1,608 | 919 | 4,460 | 3,179
Intersegment Sales | Industrial Paper Packaging |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 27,975 | 24,528 | 82,571 | 73,538
Intersegment Sales | All Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 2,318 | $ 1,814 | $ 7,483 | $ 5,970

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