Restructuring and Other Related Charges Charges Included in Statement of Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 19.0	$ 22.1	$ 24.3
Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2.0	8.1	5.9
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 17.0	$ 14.0	$ 18.4