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		6 Months Ended
	Jul. 03, 2020	Jun. 28, 2019	Jul. 03, 2020	Jun. 28, 2019
Retirement Benefits [Abstract]
Service cost:	$ (2.6)	$ (2.3)	$ (5.2)	$ (4.6)
Other net periodic pension costs:
Nonoperating income (expense)	0.1	1.3	0.2	1.4
Net periodic pension cost	$ (2.5)	$ (1.0)	$ (5.0)	$ (3.2)