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		9 Months Ended
	Oct. 02, 2020	Sep. 27, 2019	Oct. 02, 2020	Sep. 27, 2019
Retirement Benefits [Abstract]
Service cost:	$ (2.6)	$ (2.2)	$ (7.8)	$ (6.8)
Other net periodic pension costs:
Nonoperating income (expense)	0.2	0.2	0.4	1.6
Net periodic pension cost	$ (2.4)	$ (2.0)	$ (7.4)	$ (5.2)