Leases - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
ROU lease asset	$ 34.0	$ 22.6
Operating lease liability	34.2	22.8
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
ROU lease asset	34.0	22.6	$ 23.2
Operating lease liability	$ 34.2	$ 22.8	$ 23.2