SEGMENT INFORMATION - Schedule of Revenue from External Customers by Products and Services (Details) - USD ($) $ in Millions	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2023	Aug. 12, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total Revenue	$ 1,628.6	$ 2,131.9	$ 3,460.7	$ 3,905.2
Services
Segment Reporting Information [Line Items]
Total Revenue	858.4	1,295.0	2,098.9	2,303.6
Products
Segment Reporting Information [Line Items]
Total Revenue	770.2	836.9	1,361.8	1,601.6
Banking
Segment Reporting Information [Line Items]
Total Revenue	1,157.6	1,511.0	2,422.4	2,711.1
Banking | Services
Segment Reporting Information [Line Items]
Total Revenue	626.9	954.3	1,548.1	1,681.2
Banking | Products
Segment Reporting Information [Line Items]
Total Revenue	530.7	556.7	874.3	1,029.9
Retail
Segment Reporting Information [Line Items]
Total Revenue	469.3	610.0	1,018.2	1,194.1
Retail | Services
Segment Reporting Information [Line Items]
Total Revenue	230.4	335.2	540.9	622.4
Retail | Products
Segment Reporting Information [Line Items]
Total Revenue	238.9	274.8	477.3	571.7
HFS Segment
Segment Reporting Information [Line Items]
Total Revenue	1.7	10.9	20.1	0.0
HFS Segment | Services
Segment Reporting Information [Line Items]
Total Revenue	1.1	5.5	9.9	0.0
HFS Segment | Products
Segment Reporting Information [Line Items]
Total Revenue	$ 0.6	$ 5.4	$ 10.2	$ 0.0