Segment Information Revenue By Service/Product Solution (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net Sales									100.00%	100.00%
Net sales summary by segment	$ 1,105.9	$ 995.2	$ 890.5	$ 910.7	$ 1,151.6	$ 1,078.8	$ 1,150.2	$ 1,028.1	$ 3,902.3	$ 4,408.7	$ 4,578.6
Service [Member]
Segment Reporting Information [Line Items]
Net sales summary by segment									2,364.4	2,608.0	2,789.5
Product [Member]
Segment Reporting Information [Line Items]
Net sales summary by segment									1,537.9	1,800.7	1,789.1
Eurasia Banking Segment [Member]
Segment Reporting Information [Line Items]
Net sales summary by segment									1,431.1	1,649.8	1,800.2
Eurasia Banking Segment [Member] | Service [Member]
Segment Reporting Information [Line Items]
Net sales summary by segment									819.0	993.6	1,111.8
Eurasia Banking Segment [Member] | Product [Member]
Segment Reporting Information [Line Items]
Net sales summary by segment									612.1	656.2	688.4
Americas Banking Segment [Member]
Segment Reporting Information [Line Items]
Net sales summary by segment									1,419.4	1,604.1	1,515.7
Americas Banking Segment [Member] | Service [Member]
Segment Reporting Information [Line Items]
Net sales summary by segment									962.9	1,002.5	1,025.8
Americas Banking Segment [Member] | Product [Member]
Segment Reporting Information [Line Items]
Net sales summary by segment									456.5	601.6	489.9
Retail Segment [Member]
Segment Reporting Information [Line Items]
Net sales summary by segment									1,051.8	1,154.8	1,262.7
Retail Segment [Member] | Service [Member]
Segment Reporting Information [Line Items]
Net sales summary by segment									582.6	612.0	651.9
Retail Segment [Member] | Product [Member]
Segment Reporting Information [Line Items]
Net sales summary by segment									$ 469.2	$ 542.8	$ 610.8
Transferred at Point in Time [Member]
Segment Reporting Information [Line Items]
Net Sales									39.00%	41.00%
Transferred over Time [Member]
Segment Reporting Information [Line Items]
Net Sales									61.00%	59.00%