Leases (Schedule Of Supplemental Cash Flow And Other Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 01, 2020
Leases [Abstract]
Operating cash flows from operating leases	$ 37.3	$ 33.5
Operating cash flows from finance leases	0.6	0.7
Financing cash flows from finance leases	2.2	2.1
Right-of-use assets obtained in exchange for lease liabilities, Operating leases	35.3	55.9
Right-of-use assets obtained in exchange for lease liabilities, Finance leases	0.3	2.0
Finance Lease, Right-of-Use Asset, before Accumulated Amortization	14.6	18.3
Finance Lease, Right-of-Use Asset, Accumulated Amortization	$ 8.1	$ 9.9
Operating leases acquired			$ 1.6