Employee Costs (Schedule Of Employee Compensation) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Compensation Related Costs [Abstract]
Wages, salaries and incentive compensation	$ 282.1	$ 259.7	$ 259.9
Payroll taxes	20.8	18.3	13.4
Defined contribution and defined benefit pension plan expense, net	10.4	8.5	10.0
Insurance and other benefit costs	32.5	29.9	28.2
Share-based compensation	18.8	14.3	11.3
Total	$ 364.6	$ 330.7	$ 322.8