v3.26.1
Segment Information - Schedule of Reportable Segment Information (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Segment Reporting Information [Line Items]    
Net Sales $ 2,156 $ 2,120
Cost of Sales 1,850 1,675
Selling, General and Administrative 202 196
Other 85 28
Income (Loss) from Operations 19 221
Other Segment Information    
Capital Spending 140 313
Depreciation and Amortization 139 131
Operating Segments    
Segment Reporting Information [Line Items]    
Income (Loss) from Operations 128 268
Operating Segments | Americas Paperboard Packaging    
Segment Reporting Information [Line Items]    
Net Sales 1,464 1,476
Cost of Sales 1,236 1,141
Selling, General and Administrative 90 94
Other 8 13
Income (Loss) from Operations 130 228
Other Segment Information    
Capital Spending 16 19
Depreciation and Amortization 39 43
Operating Segments | International Paperboard Packaging    
Segment Reporting Information [Line Items]    
Net Sales 563 523
Cost of Sales 488 421
Selling, General and Administrative 67 61
Other 10 1
Income (Loss) from Operations (2) 40
Other Segment Information    
Capital Spending 25 24
Depreciation and Amortization 34 29
Corporate and Other    
Segment Reporting Information [Line Items]    
Net Sales 129 121
Cost of Sales 126 113
Selling, General and Administrative 45 41
Other 67 14
Income (Loss) from Operations (109) (47)
Other Segment Information    
Capital Spending 99 270
Depreciation and Amortization $ 66 $ 59