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Summary of Significant Accounting Policies - Schedule of Estimated Amortization Expense (Detail)
$ in Millions
Sep. 25, 2021
USD ($)
Accounting Policies [Abstract]  
Fiscal 2022 $ 326.5
Fiscal 2023 231.3
Fiscal 2024 222.3
Fiscal 2025 208.9
Fiscal 2026 $ 178.1