Defined Benefit Plans (Components of Net Periodic Benefit Cost Reflected in the Consolidated Condensed Statement of Earnings) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2018	Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Total service cost	$ (10.9)	$ (9.8)
Other income, net	7.8	6.9
Net periodic benefit cost	(3.1)	(2.9)
Cost of sales
Defined Benefit Plan Disclosure [Line Items]
Total service cost	(2.1)	(2.0)
Selling, general and administrative expenses
Defined Benefit Plan Disclosure [Line Items]
Total service cost	$ (8.8)	$ (7.8)