Segment Information - Revenue by Service/Product Solution (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue from External Customer [Line Items]
Net Sales			100.00%	100.00%
Net sales	$ 890.5	$ 1,150.2	$ 1,801.2	$ 2,178.3
Eurasia Banking
Revenue from External Customer [Line Items]
Net sales	337.7	430.2	648.2	812.8
Americas Banking Segment [Member]
Revenue from External Customer [Line Items]
Net sales	331.4	419.9	676.1	782.6
Retail
Revenue from External Customer [Line Items]
Net sales	221.4	300.1	476.9	582.9
Service [Member]
Revenue from External Customer [Line Items]
Net sales	559.7	659.3	1,147.5	1,288.0
Service [Member] | Eurasia Banking
Revenue from External Customer [Line Items]
Net sales	192.6	251.2	398.6	498.2
Service [Member] | Americas Banking Segment [Member]
Revenue from External Customer [Line Items]
Net sales	234.4	252.6	473.9	493.4
Service [Member] | Retail
Revenue from External Customer [Line Items]
Net sales	132.7	155.5	275.0	296.4
Product [Member]
Revenue from External Customer [Line Items]
Net sales	330.8	490.9	653.7	890.3
Product [Member] | Eurasia Banking
Revenue from External Customer [Line Items]
Net sales	145.1	179.0	249.6	314.6
Product [Member] | Americas Banking Segment [Member]
Revenue from External Customer [Line Items]
Net sales	97.0	167.3	202.2	289.2
Product [Member] | Retail
Revenue from External Customer [Line Items]
Net sales	$ 88.7	$ 144.6	$ 201.9	$ 286.5
Transferred at Point in Time [Member]
Revenue from External Customer [Line Items]
Net Sales			36.00%	41.00%
Transferred over Time [Member]
Revenue from External Customer [Line Items]
Net Sales			64.00%	59.00%