Restructuring (Summary of Restructuring Charges) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Restructuring Cost and Reserve [Line Items]
Severance	$ 0.0	$ (0.4)
Other	0.0	12.7
Total	0.0	(13.1)
Process Flow Technologies
Restructuring Cost and Reserve [Line Items]
Total	0.0	(12.6)
Payment & Merchandising Technologies
Restructuring Cost and Reserve [Line Items]
Total	0.0	(0.5)
2020 Repositioning Actions
Restructuring Cost and Reserve [Line Items]
Severance	0.0	(0.5)
Other	0.0	0.0
Total	0.0	(0.5)
2020 Repositioning Actions | Payment & Merchandising Technologies
Restructuring Cost and Reserve [Line Items]
Severance	0.0	(0.5)
Other	0.0	0.0
Total	0.0	(0.5)
2019 Repositioning Actions
Restructuring Cost and Reserve [Line Items]
Severance	0.0	0.1
Other	0.0	0.0
Total	0.0	0.1
2019 Repositioning Actions | Process Flow Technologies
Restructuring Cost and Reserve [Line Items]
Severance	0.0	0.1
Other	0.0	0.0
Total	0.0	0.1
2017 Repositioning Actions
Restructuring Cost and Reserve [Line Items]
Severance	0.0	0.0
Other	0.0	12.7
Total	0.0	(12.7)
2017 Repositioning Actions | Process Flow Technologies
Restructuring Cost and Reserve [Line Items]
Severance	0.0	0.0
Other	0.0	12.7
Total	$ 0.0	$ (12.7)