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Net (Loss) Income Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Mar. 30, 2024
Dec. 30, 2023
Sep. 30, 2023
Mar. 25, 2023
Dec. 24, 2022
Sep. 24, 2022
Mar. 30, 2024
Mar. 25, 2023
Numerator:                
Net Income (Loss) $ (18.1) $ (9.0) $ (55.6) $ 10.4 $ 22.0 $ 64.6 $ (82.7) $ 97.0
Denominator:                
Shares, basic 39.3     39.4     39.1 39.7
Effect of dilutive share-based awards and convertible notes 0     0.5     0 0.6
Shares, diluted 39.3     39.9     39.1 40.3
Net (loss) income per share:                
Basic $ (0.46)     $ 0.26     $ (2.12) $ 2.44
Diluted $ (0.46)     $ 0.26     $ (2.12) $ 2.41