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Pay vs Performance Disclosure - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 28, 2024
Sep. 28, 2024
Dec. 30, 2023
Sep. 30, 2023
Dec. 28, 2024
Dec. 30, 2023
Pay vs Performance Disclosure            
Net income (loss) $ 1.8 $ (23.1) $ (9.0) $ (55.6) $ (21.3) $ (64.6)