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Goodwill and Other Intangible Assets - Estimated Future Amortization Expense (Details) - USD ($)
$ in Millions
Sep. 29, 2018
Jun. 30, 2018
Fiscal Years    
Remainder of 2019 $ 2.2  
2020 2.9  
2021 0.5  
2022 0.5  
Thereafter 0.2  
Net $ 6.3 $ 7.0