Restructuring (Restructuring Reserve) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2.9	$ 0.8	$ 7.2
2017Repositioning [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	23.2
Restructuring charges	0.7
Payments for restructuring	(8.0)
Restructuring reserve, ending balance	15.9		23.2
2017Repositioning [Member] | Fluid Handling
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	12.9
Restructuring charges	0.6
Payments for restructuring	(1.4)
Restructuring reserve, ending balance	12.1		12.9
2017Repositioning [Member] | Fluid Handling | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	12.9
Restructuring charges	0.6
Payments for restructuring	(1.4)
Restructuring reserve, ending balance	12.1		12.9
2017Repositioning [Member] | Fluid Handling | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	0.0
Restructuring charges	0.0
Payments for restructuring	0.0
Restructuring reserve, ending balance	0.0		0.0
2017Repositioning [Member] | Payment & Merchandising Technologies
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	9.4
Restructuring charges	0.2
Payments for restructuring	(6.5)
Restructuring reserve, ending balance	3.1		9.4
2017Repositioning [Member] | Payment & Merchandising Technologies | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	9.4
Restructuring charges	0.0
Payments for restructuring	(6.3)
Restructuring reserve, ending balance	3.1		9.4
2017Repositioning [Member] | Payment & Merchandising Technologies | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	0.0
Restructuring charges	0.2
Payments for restructuring	(0.2)
Restructuring reserve, ending balance	0.0		0.0
2017Repositioning [Member] | Aerospace & Electronics
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	0.9
Restructuring charges	(0.1)
Payments for restructuring	(0.1)
Restructuring reserve, ending balance	0.7		0.9
2017Repositioning [Member] | Aerospace & Electronics | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	0.9
Restructuring charges	0.0
Payments for restructuring	(0.2)
Restructuring reserve, ending balance	0.7		0.9
2017Repositioning [Member] | Aerospace & Electronics | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	0.0
Restructuring charges	(0.1)
Payments for restructuring	0.1
Restructuring reserve, ending balance	$ 0.0		$ 0.0