Segment Information - Revenue by Service/Product Solution (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue from External Customer [Line Items]
Net sales	$ 922.2	$ 851.7	$ 1,780.3	$ 1,681.5
Service [Member]
Revenue from External Customer [Line Items]
Net sales	538.0	525.4	1,054.4	1,051.6
Product [Member]
Revenue from External Customer [Line Items]
Net sales	384.2	326.3	725.9	629.9
Global Retail [Member]
Revenue from External Customer [Line Items]
Net sales	252.4	255.8	512.8	517.5
Global Retail [Member] | Operating Segments [Member]
Revenue from External Customer [Line Items]
Net sales	252.4	255.8	512.8	517.5
Global Retail [Member] | Service [Member]
Revenue from External Customer [Line Items]
Net sales	135.3	135.3	268.5	275.2
Global Retail [Member] | Product [Member]
Revenue from External Customer [Line Items]
Net sales	117.1	120.5	244.3	242.3
Global Banking
Revenue from External Customer [Line Items]
Net sales	664.9	590.2	1,257.8	1,152.9
Global Banking | Operating Segments [Member]
Revenue from External Customer [Line Items]
Net sales	664.9	590.2	1,257.8	1,152.9
Global Banking | Service [Member]
Revenue from External Customer [Line Items]
Net sales	400.2	389.3	781.3	772.9
Global Banking | Product [Member]
Revenue from External Customer [Line Items]
Net sales	264.7	200.9	476.5	380.0
Other Segments
Revenue from External Customer [Line Items]
Net sales	4.9	5.7	9.7	11.1
Other Segments | Service [Member]
Revenue from External Customer [Line Items]
Net sales	2.5	0.8	4.6	3.4
Other Segments | Product [Member]
Revenue from External Customer [Line Items]
Net sales	$ 2.4	$ 4.9	$ 5.1	$ 7.7