Segment Information - Schedule of Revenue from External Customers by Products and Services (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting Information [Line Items]
Total revenue	$ 939.7	$ 922.2	$ 1,835.1	$ 1,780.3
Banking | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	707.4	664.9	1,356.2	1,257.8
Retail | Operating Segments
Segment Reporting Information [Line Items]
Total revenue	232.3	252.4	478.9	512.8
Services
Segment Reporting Information [Line Items]
Total revenue	540.7	538.0	1,065.5	1,054.4
Services | Banking
Segment Reporting Information [Line Items]
Total revenue	401.5	400.2	788.1	781.3
Services | Retail
Segment Reporting Information [Line Items]
Total revenue	139.2	135.3	277.4	268.5
Services | HFS Segment
Segment Reporting Information [Line Items]
Total revenue	0.0	2.5	0.0	4.6
Products
Segment Reporting Information [Line Items]
Total revenue	399.0	384.2	769.6	725.9
Products | Banking
Segment Reporting Information [Line Items]
Total revenue	305.9	264.7	568.1	476.5
Products | Retail
Segment Reporting Information [Line Items]
Total revenue	93.1	117.1	201.5	244.3
Products | HFS Segment
Segment Reporting Information [Line Items]
Total revenue	$ 0.0	$ 2.4	$ 0.0	$ 5.1