Segment Information Segment Information By Revenue Type (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Revenues	$ (829.8)	$ (943.9)
Eurasia Banking Segment [Member]
Segment Reporting Information [Line Items]
Revenues	(277.9)	(327.8)
Americas Banking Segment [Member]
Segment Reporting Information [Line Items]
Revenues	(284.8)	(311.7)
Retail Segment [Member]
Segment Reporting Information [Line Items]
Revenues	(267.1)	(304.4)
Service [Member]
Segment Reporting Information [Line Items]
Revenues	(526.2)	(573.6)
Service [Member] | Eurasia Banking Segment [Member]
Segment Reporting Information [Line Items]
Revenues	(159.5)	(189.6)
Service [Member] | Americas Banking Segment [Member]
Segment Reporting Information [Line Items]
Revenues	(224.2)	(227.7)
Service [Member] | Retail Segment [Member]
Segment Reporting Information [Line Items]
Revenues	(142.5)	(156.3)
Product [Member]
Segment Reporting Information [Line Items]
Revenues	(303.6)	(370.3)
Product [Member] | Eurasia Banking Segment [Member]
Segment Reporting Information [Line Items]
Revenues	(118.4)	(138.2)
Product [Member] | Americas Banking Segment [Member]
Segment Reporting Information [Line Items]
Revenues	(60.6)	(84.0)
Product [Member] | Retail Segment [Member]
Segment Reporting Information [Line Items]
Revenues	$ (124.6)	$ (148.1)