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Leases - Narrative (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Sep. 30, 2019
Lessee, Lease, Description [Line Items]    
Operating lease assets $ 123.0  
2020   $ 16.8
2021   10.3
2022   6.6
2023   5.8
2024   5.4
Thereafter   $ 38.9
Embedded Lease Agreement    
Lessee, Lease, Description [Line Items]    
Operating lease assets 34.0  
North America Headquarters    
Lessee, Lease, Description [Line Items]    
Operating lease assets $ 17.0