Segment Information - Revenue by Service/Product Solution (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue from External Customer [Line Items]
Net Sales			100.00%	100.00%
Net sales	$ 995.2	$ 1,078.8	$ 2,796.4	$ 3,257.1
Eurasia Banking
Revenue from External Customer [Line Items]
Net sales	364.2	405.2	1,012.4	1,218.0
Americas Banking Segment [Member]
Revenue from External Customer [Line Items]
Net sales	368.5	403.7	1,044.6	1,186.3
Retail
Revenue from External Customer [Line Items]
Net sales	262.5	269.9	739.4	852.8
Service [Member]
Revenue from External Customer [Line Items]
Net sales	588.9	643.0	1,736.4	1,931.0
Service [Member] | Eurasia Banking
Revenue from External Customer [Line Items]
Net sales	198.5	241.8	597.1	740.0
Service [Member] | Americas Banking Segment [Member]
Revenue from External Customer [Line Items]
Net sales	247.8	252.6	721.7	746.0
Service [Member] | Retail
Revenue from External Customer [Line Items]
Net sales	142.6	148.6	417.6	445.0
Product [Member]
Revenue from External Customer [Line Items]
Net sales	406.3	435.8	1,060.0	1,326.1
Product [Member] | Eurasia Banking
Revenue from External Customer [Line Items]
Net sales	165.7	163.4	415.3	478.0
Product [Member] | Americas Banking Segment [Member]
Revenue from External Customer [Line Items]
Net sales	120.7	151.1	322.9	440.3
Product [Member] | Retail
Revenue from External Customer [Line Items]
Net sales	$ 119.9	$ 121.3	$ 321.8	$ 407.8
Transferred at Point in Time [Member]
Revenue from External Customer [Line Items]
Net Sales			38.00%	41.00%
Transferred over Time [Member]
Revenue from External Customer [Line Items]
Net Sales			62.00%	59.00%