Restructuring (Restructuring Reserve) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring (gain) charges, net	$ (1.2)	$ 2.9
2017 Repositioning
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	12.7
Restructuring (gain) charges, net	(1.5)
Payments for restructuring	(0.1)
Restructuring reserve, ending balance	11.3
2017 Repositioning | Fluid Handling
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	10.3
Restructuring (gain) charges, net	0.0
Payments for restructuring	1.1
Restructuring reserve, ending balance	9.2
2017 Repositioning | Fluid Handling | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	10.3
Restructuring (gain) charges, net	0.0
Payments for restructuring	(1.1)
Restructuring reserve, ending balance	9.2
2017 Repositioning | Fluid Handling | Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	0.0
Restructuring (gain) charges, net	0.0
Payments for restructuring	0.0
Restructuring reserve, ending balance	0.0
2017 Repositioning | Payment & Merchandising Technologies
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	1.6
Restructuring (gain) charges, net	(1.5)
Payments for restructuring	(1.5)
Restructuring reserve, ending balance	1.6
2017 Repositioning | Payment & Merchandising Technologies | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	1.6
Restructuring (gain) charges, net	0.0
Payments for restructuring	0.0
Restructuring reserve, ending balance	1.6
2017 Repositioning | Payment & Merchandising Technologies | Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	0.0
Restructuring (gain) charges, net	(1.5)
Payments for restructuring	1.5
Restructuring reserve, ending balance	0.0
2017 Repositioning | Aerospace & Electronics
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	0.8
Restructuring (gain) charges, net	0.0
Payments for restructuring	(0.3)
Restructuring reserve, ending balance	0.5
2017 Repositioning | Aerospace & Electronics | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	0.6
Restructuring (gain) charges, net	0.0
Payments for restructuring	(0.1)
Restructuring reserve, ending balance	0.5
2017 Repositioning | Aerospace & Electronics | Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	0.2
Payments for restructuring	(0.2)
Restructuring reserve, ending balance	$ 0.0