Segment Information - Revenue by Service/Product Solution (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue from External Customer [Line Items]
Net sales	$ 851.7	$ 943.5	$ 1,681.5	$ 1,887.4
Service [Member]
Revenue from External Customer [Line Items]
Net sales	525.4	586.7	1,051.6	1,160.3
Product [Member]
Revenue from External Customer [Line Items]
Net sales	326.3	356.8	629.9	727.1
Foreign Plan [Member] | Pension Plan [Member]
Revenue from External Customer [Line Items]
Defined Benefit Plan, Service Cost	2.3	2.6	4.7	5.1
Defined Benefit Plan, Interest Cost	1.1	0.7	2.2	1.5
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(3.9)	(3.7)	(7.8)	(7.5)
Net periodic pension benefit cost	(1.1)	(1.1)	(2.0)	(0.8)
Domestic Plan [Member] | Pension Plan [Member]
Revenue from External Customer [Line Items]
Defined Benefit Plan, Service Cost	0.0	0.8	0.0	1.6
Defined Benefit Plan, Interest Cost	4.2	3.9	8.5	7.9
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(5.8)	(6.3)	(11.6)	(12.7)
Net periodic pension benefit cost	(0.1)	0.6	0.0	1.3
Global Retail [Member]
Revenue from External Customer [Line Items]
Net sales	255.8	305.0	517.5	609.4
Global Retail [Member] | Operating Segments [Member]
Revenue from External Customer [Line Items]
Net sales	255.8	305.0	517.5	609.4
Global Retail [Member] | Service [Member]
Revenue from External Customer [Line Items]
Net sales	135.3	162.7	275.2	319.1
Global Retail [Member] | Product [Member]
Revenue from External Customer [Line Items]
Net sales	120.5	142.3	242.3	290.3
Global Banking
Revenue from External Customer [Line Items]
Net sales		638.5		1,278.0
Global Banking | Operating Segments [Member]
Revenue from External Customer [Line Items]
Net sales	590.2	638.5	1,152.9	1,278.0
Global Banking | Service [Member]
Revenue from External Customer [Line Items]
Net sales	389.3	424.0	772.9	841.2
Global Banking | Product [Member]
Revenue from External Customer [Line Items]
Net sales	200.9	214.5	380.0	436.8
Other Segments | Operating Segments [Member]
Revenue from External Customer [Line Items]
Net sales	5.7	0.0	11.1	0.0
Other Segments | Service [Member]
Revenue from External Customer [Line Items]
Net sales	0.8	0.0	3.4	0.0
Other Segments | Product [Member]
Revenue from External Customer [Line Items]
Net sales	$ 4.9	$ 0.0	$ 7.7	$ 0.0