Basis of Presentation (Details)	Nov. 04, 2024
Magnera Corporation | Treasure Shareholders
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Ownership interest	90.00%
Magnera Corporation | Glatfelter Shareholders
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Ownership interest	10.00%
Treasure Holdco, Inc. | Berry Global Group, Inc.
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Ownership interest	0.00%