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Leases - Schedule of minimum lease payments for operating leases under ASC 840 expiring subsequent to June 30, 2019 (Details)
$ in Millions
Jun. 30, 2019
USD ($)
Leases [Abstract]  
2020 $ 12.7
2021 10.4
2022 8.3
2023 6.6
2024 5.0
Thereafter 23.5
Total future minimum lease payments $ 66.5