Lease Accounting (Cash Flow Information) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash paid for amounts included in the measurement of liabilities
Operating cash flows from operating leases	$ 7.5	$ 6.7
Operating cash flows from finance leases	0.1	0.1
Financing cash flows from finance leases	$ 0.7	$ 0.7