Income Taxes (Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Intangibles	$ (112.7)	$ (90.8)
Depreciation expense	(13.3)	(15.0)
Deferred Tax Assets Leasing liabilities	25.7	0.0
Deferred Tax Liability Leasing Asset	(24.8)	0.0
Allowance for doubtful accounts	1.8	1.6
Employee related accruals	12.0	9.6
Stock-based compensation	9.2	9.5
Other	3.4	5.3
Net operating loss carryforwards - foreign	0.8	1.0
Valuation allowance	(0.8)	(1.0)
Total deferred income tax assets (liabilities)	$ (98.7)	$ (79.8)