Debt (Schedule Of Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Principal debt outstanding	$ 590.0	$ 655.0
Unamortized debt financing costs	(3.2)	(3.9)
Less current installments of long-term debt	22.5	0.0
Long-term debt, less current installments of long-term debt	564.3	651.1
Revolving credit facility (due 2027) [Member]
Debt Instrument [Line Items]
Principal debt outstanding	140.0	205.0
Term loan A (due 2027) [Member]
Debt Instrument [Line Items]
Principal debt outstanding	450.0	450.0
Long-term Debt [Member]
Debt Instrument [Line Items]
Long-term debt	586.8	651.1
Short-term Debt [Member]
Debt Instrument [Line Items]
Less current installments of long-term debt	22.5	0.0
Long-Term Debt, Less Current Portion [Member]
Debt Instrument [Line Items]
Long-term debt, less current installments of long-term debt	$ 564.3	$ 651.1