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Income Taxes - Income (Loss) Before Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2023
Sep. 24, 2022
Sep. 25, 2021
Income Tax Disclosure [Abstract]      
Domestic $ 861.4 $ 1,340.3 $ 2,267.8
Foreign (185.3) 247.9 93.3
Income before income taxes $ 676.1 $ 1,588.2 $ 2,361.1