Pension And Other Benefit Plans - Components of Net Periodic Benefit Cost Reflected in the Consolidated Condensed Statement of Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Service cost	$ (7.3)	$ (9.7)	$ (8.5)
Other net periodic pension costs:
Other income (expense)	2.6	(0.3)	2.1
Net periodic pension cost	$ (4.7)	$ (10.0)	$ (6.4)