Leases Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Millions	Mar. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Right-of-use assets operating leases	$ 17.2
Right-of-use assets finance lease	6.6
Operating lease liabilities	19.9	$ 20.8
Finance lease liabilities	$ 7.9
Operating lease, weighted average remaining lease term (years)	5 years 2 months
Finance lease, weighted average remaining lease term (years)	9 years 3 months
Operating lease, weighted average discount rate, percent	4.70%
Finance lease, weighted average discount rate, percent	5.90%