Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease ROU assets - non-current	$ 42.7	$ 44.3
Operating lease liabilities - current	14.8	15.5
Operating lease liabilities - non-current	28.3	30.6
Total operating lease liabilities	$ 43.1	$ 46.1
Weighted average remaining lease term in years - operating leases	3 years 7 months 6 days	3 years 8 months 12 days
Weighted average discount rate - operating leases	2.80%	2.80%