Segment Information - Revenue by Service/Product Solution (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue from External Customer [Line Items]
Net sales	$ 858.1	$ 829.8
Service [Member]
Revenue from External Customer [Line Items]
Net sales	516.4	526.2
Product [Member]
Revenue from External Customer [Line Items]
Net sales	341.7	303.6
Global Retail [Member]
Revenue from External Customer [Line Items]
Net sales	260.4	261.7
Global Retail [Member] | Operating Segments [Member]
Revenue from External Customer [Line Items]
Net sales	260.4	261.7
Global Retail [Member] | Service [Member]
Revenue from External Customer [Line Items]
Net sales	133.2	140.0
Global Retail [Member] | Product [Member]
Revenue from External Customer [Line Items]
Net sales	127.2	121.7
Global Banking
Revenue from External Customer [Line Items]
Net sales	592.9	562.7
Global Banking | Operating Segments [Member]
Revenue from External Customer [Line Items]
Net sales	592.9	562.7
Global Banking | Service [Member]
Revenue from External Customer [Line Items]
Net sales	381.1	383.7
Global Banking | Product [Member]
Revenue from External Customer [Line Items]
Net sales	211.8	179.0
Other Segments
Revenue from External Customer [Line Items]
Net sales	4.8	5.4
Other Segments | Service [Member]
Revenue from External Customer [Line Items]
Net sales	2.1	2.5
Other Segments | Product [Member]
Revenue from External Customer [Line Items]
Net sales	$ 2.7	$ 2.9