Segment Information - Revenue by Service/Product Solution (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue from External Customer [Line Items]
Net Sales	10920.00%
Net sales	$ 943.9	$ 910.7
Eurasia Banking
Revenue from External Customer [Line Items]
Net sales	327.8	310.5
Americas Banking Segment [Member]
Revenue from External Customer [Line Items]
Net sales	311.7	344.7
Retail
Revenue from External Customer [Line Items]
Net sales	304.4	255.5
Service [Member]
Revenue from External Customer [Line Items]
Net sales	573.6	587.8
Service [Member] | Eurasia Banking
Revenue from External Customer [Line Items]
Net sales	189.6	206.0
Service [Member] | Americas Banking Segment [Member]
Revenue from External Customer [Line Items]
Net sales	227.7	239.5
Service [Member] | Retail
Revenue from External Customer [Line Items]
Net sales	156.3	142.3
Product [Member]
Revenue from External Customer [Line Items]
Net sales	370.3	322.9
Product [Member] | Eurasia Banking
Revenue from External Customer [Line Items]
Net sales	138.2	104.5
Product [Member] | Americas Banking Segment [Member]
Revenue from External Customer [Line Items]
Net sales	84.0	105.2
Product [Member] | Retail
Revenue from External Customer [Line Items]
Net sales	$ 148.1	$ 113.2