Income Taxes (Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Intangibles	$ (159.9)	$ (127.5)
Depreciation expense	(8.8)	(11.4)
Operating lease right-of-use assets	(11.8)	(14.8)
Operating lease liabilities	12.2	15.6
Allowance for doubtful accounts	1.3	1.5
Employee-related accruals	21.0	20.5
Stock-based compensation	11.1	10.0
Payroll tax deferral	0.0	10.5
Other	5.7	6.6
Deferred Tax Liabilities, net of deferred tax assets and valuation allowance	$ (129.2)	$ (89.0)