CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2023		1,000
Beginning balance at Dec. 31, 2023	$ 1,644,870	$ 0	$ 1,766,024	$ (139,021)	$ 17,867
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive loss	(18,136)				(18,136)
Share-based compensation	4,482		4,482
Dividend to Parent	(231,625)		(231,625)
Net loss	(602,828)			(602,828)
Ending balance (in shares) at Sep. 28, 2024		1,000
Ending balance at Sep. 28, 2024	796,763	$ 0	1,538,881	(741,849)	(269)
Beginning balance (in shares) at Jun. 29, 2024		1,000
Beginning balance at Jun. 29, 2024	1,294,252	$ 0	1,537,176	(264,815)	21,891
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive loss	(22,160)				(22,160)
Share-based compensation	1,705		1,705
Net loss	(477,034)			(477,034)
Ending balance (in shares) at Sep. 28, 2024		1,000
Ending balance at Sep. 28, 2024	$ 796,763	$ 0	1,538,881	(741,849)	(269)
Beginning balance (in shares) at Dec. 31, 2024	1,000	1,000
Beginning balance at Dec. 31, 2024	$ 204,877	$ 0	1,540,572	(1,328,431)	(7,264)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive loss	(5,068)				(5,068)
Share-based compensation	(462)		(462)
Net loss	$ (526,573)			(526,573)
Ending balance (in shares) at Sep. 27, 2025	1,000	1,000
Ending balance at Sep. 27, 2025	$ (327,226)	$ 0	1,540,110	(1,855,004)	(12,332)
Beginning balance (in shares) at Jun. 28, 2025		1,000
Beginning balance at Jun. 28, 2025	35,041	$ 0	1,538,155	(1,499,023)	(4,091)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive loss	(8,241)				(8,241)
Share-based compensation	1,955		1,955
Net loss	$ (355,981)			(355,981)
Ending balance (in shares) at Sep. 27, 2025	1,000	1,000
Ending balance at Sep. 27, 2025	$ (327,226)	$ 0	$ 1,540,110	$ (1,855,004)	$ (12,332)