Leases Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jan. 01, 2019
Leases [Abstract]
Right-of-use assets operating leases	$ 16.4
Right-of-use assets finance lease	6.4
Operating lease liabilities	19.1	$ 20.8
Finance lease liabilities	$ 7.8
Operating lease, weighted-average remaining lease term (years)	4 years 10 months 25 days
Finance lease, weighted-average remaining lease term (years)	9 years 1 month
Operating lease, weighted-average discount rate, percent	4.69%
Finance lease, weighted-average discount rate, percent	5.89%