Consolidated and Combined Statements of Changes in Stockholders’ Equity - USD ($) $ in Millions	Total	Berry Net Investment	Additional Paid-in Capital	Other Comprehensive Income (Loss) - Currency Translation	Retained Loss
Beginning balance at Sep. 30, 2023	$ 2,390	$ 2,561	$ 0	$ (171)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	6	6
Other comprehensive income (loss)	18			18
Transfers from parent, net	16	16
Ending balance at Mar. 30, 2024	2,430	2,583	0	(153)	0
Beginning balance at Dec. 30, 2023	2,416	2,548	0	(132)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	14	14
Other comprehensive income (loss)	(21)			(21)
Transfers from parent, net	21	21
Ending balance at Mar. 30, 2024	2,430	2,583	0	(153)	0
Beginning balance at Sep. 28, 2024	2,139	2,307	0	(168)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(101)				(101)
Other comprehensive income (loss)	(46)			(46)
Transfers from parent, net	(1,111)	(1,111)
October net investment	129	129
Distribution of Berry’s net investment	0	(1,325)	1,325
Acquisition of GLT	74		74
Share-based compensation	10		10
Other	(1)		(1)
Ending balance at Mar. 29, 2025	1,093	0	1,408	(214)	(101)
Beginning balance at Dec. 28, 2024	1,106	0	1,405	(239)	(60)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(41)				(41)
Other comprehensive income (loss)	25			25
Share-based compensation	4		4
Other	(1)		(1)
Ending balance at Mar. 29, 2025	$ 1,093	$ 0	$ 1,408	$ (214)	$ (101)