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Commitments and Contingencies - Future Minimum Annual Rental Income Payments Under Sublease Agreements (Details)
$ in Millions
Sep. 29, 2018
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
Fiscal 2019 $ 2.5
Fiscal 2020 1.8
Fiscal 2021 0.6
Fiscal 2022 0.6
Fiscal 2023 0.6
Thereafter 1.2
Total $ 7.3