Segment Information - Revenue by Service/Product Solution (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue from External Customer [Line Items]
Net sales	$ 810.4	$ 958.2	$ 2,491.9	$ 2,845.6
Service [Member]
Revenue from External Customer [Line Items]
Net sales	514.3	561.7	1,565.9	1,722.0
Product [Member]
Revenue from External Customer [Line Items]
Net sales	296.1	396.5	926.0	1,123.6
Global Retail [Member]
Revenue from External Customer [Line Items]
Net sales	225.0	288.1	742.4	897.5
Global Retail [Member] | Operating Segments [Member]
Revenue from External Customer [Line Items]
Net sales	225.0	288.1	742.4	897.5
Global Retail [Member] | Service [Member]
Revenue from External Customer [Line Items]
Net sales	130.4	147.1	405.6	466.1
Global Retail [Member] | Product [Member]
Revenue from External Customer [Line Items]
Net sales	94.6	141.0	336.8	431.4
Global Banking
Revenue from External Customer [Line Items]
Net sales	580.3	670.1	1,733.3	1,948.1
Global Banking | Operating Segments [Member]
Revenue from External Customer [Line Items]
Net sales	580.3	670.1	1,733.3	1,948.1
Global Banking | Service [Member]
Revenue from External Customer [Line Items]
Net sales	379.9	414.6	1,152.9	1,255.9
Global Banking | Product [Member]
Revenue from External Customer [Line Items]
Net sales	200.4	255.5	580.4	692.2
Other Segments
Revenue from External Customer [Line Items]
Net sales	5.1	0.0	16.2	0.0
Other Segments | Service [Member]
Revenue from External Customer [Line Items]
Net sales	4.0	0.0	7.4	0.0
Other Segments | Product [Member]
Revenue from External Customer [Line Items]
Net sales	$ 1.1	$ 0.0	$ 8.8	$ 0.0