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Leases - Maturities of Lease Liabilities (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Oct. 01, 2019
Leases [Abstract]    
2021 $ 16.0  
2022 15.3  
2023 13.6  
2024 11.8  
2025 11.0  
After 2025 82.6  
Total lease payments 150.3  
Less: interest 31.6  
Present value of lease liabilities $ 118.7 $ 36.2