Pension And Other Benefit Plans - (Components of Net Periodic Benefit Cost Reflected in the Consolidated Condensed Statement of Earnings) (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 03, 2020	Mar. 29, 2019
Retirement Benefits [Abstract]
Service cost:	$ (2.6)	$ (2.3)
Other net periodic pension costs:
Nonoperating income (expense)	0.1	0.1
Net periodic pension cost	$ (2.5)	$ (2.2)