Restructuring and Other Related Charges - Charges Included in Statement of Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 7.0	$ 18.6	$ 20.2
Cost of sales
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2.0	2.0	6.8
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 5.0	$ 16.6	$ 13.4