Lease Accounting (Cash Flow Information) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash paid for amounts included in the measurement of liabilities
Operating cash flows from operating leases	$ 11.4	$ 10.2
Operating cash flows from finance leases	0.1	0.1
Financing cash flows from finance leases	$ 1.1	$ 1.1