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Leases - Schedule of Lease Assets and Lease Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Leases [Abstract]    
Operating lease assets $ 28.0 $ 25.8
Finance lease assets $ 6.1 $ 6.6
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] us-gaap:PropertyPlantAndEquipmentNet us-gaap:PropertyPlantAndEquipmentNet
Total lease assets $ 34.1 $ 32.4
Operating lease liabilities, current $ 4.5 $ 3.9
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:OtherAccruedLiabilitiesCurrent us-gaap:OtherAccruedLiabilitiesCurrent
Finance lease liabilities, current $ 1.3 $ 1.2
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:OtherAccruedLiabilitiesCurrent us-gaap:OtherAccruedLiabilitiesCurrent
Operating lease liabilities, noncurrent $ 27.0 $ 25.2
Finance lease liabilities, noncurrent $ 4.8 $ 5.4
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] us-gaap:OtherLiabilitiesNoncurrent us-gaap:OtherLiabilitiesNoncurrent
Total lease liabilities $ 37.6 $ 35.7