Basic and Diluted Net Income (Loss) Per Share - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 30, 2023
Numerator
Consolidated net income (loss)	$ (159)	$ (154)	$ 38
Denominator
Weighted average common shares outstanding - basic (in Shares)	35.5	31.8	31.8
Weighted average common shares outstanding - dilutive (in Shares)	35.5	31.8	31.8
Net income (loss) per share:
Basic (in Dollars per share)	$ (4.47)	$ (4.84)	$ 1.19
Diluted (in Dollars per share)	$ (4.47)	$ (4.84)	$ 1.19