Defined 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
	Sep. 28, 2018	Sep. 29, 2017	Sep. 28, 2018	Sep. 29, 2017
Defined Benefit Plan Disclosure [Line Items]
Total service cost	$ (9.8)	$ (10.1)	$ (31.9)	$ (29.9)
Other income, net	9.1	8.3	25.2	22.2
Net periodic pension benefit (cost)	(0.7)	(1.8)	(6.7)	(7.7)
Cost of sales
Defined Benefit Plan Disclosure [Line Items]
Total service cost	(1.6)	(2.1)	(7.0)	(6.2)
Selling, general and administrative expenses
Defined Benefit Plan Disclosure [Line Items]
Total service cost	$ (8.2)	$ (8.0)	$ (24.9)	$ (23.7)