Lease Accounting (Cash Flow Information) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash paid for amounts included in the measurement of liabilities
Operating cash flows from operating leases	$ 3.7	$ 3.3
Operating cash flows from finance leases	0.0	0.0
Financing cash flows from finance leases	$ 0.4	$ 0.4