Segment Information - Revenue by Service/Product Solution (Details) - USD ($) $ in Millions	1 Months Ended	2 Months Ended	3 Months Ended	7 Months Ended	9 Months Ended
	Aug. 11, 2023	Sep. 30, 2023	Sep. 30, 2022	Aug. 11, 2023	Sep. 30, 2022
Revenue from External Customer [Line Items]
Net sales	$ 351.6	$ 591.8	$ 810.4	$ 2,131.9	$ 2,491.9
Service [Member]
Revenue from External Customer [Line Items]
Net sales	240.6	305.5	514.3	1,295.0	1,565.9
Product
Revenue from External Customer [Line Items]
Net sales	111.0	286.3	296.1	836.9	926.0
Global Retail [Member]
Revenue from External Customer [Line Items]
Net sales	97.2	181.1	225.0	610.0	742.4
Global Retail [Member] | Operating Segments [Member]
Revenue from External Customer [Line Items]
Net sales	97.2	181.1	225.0	610.0	742.4
Global Retail [Member] | Service [Member]
Revenue from External Customer [Line Items]
Net sales	66.7	76.0	130.4	335.2	405.6
Global Retail [Member] | Product
Revenue from External Customer [Line Items]
Net sales	30.5	105.1	94.6	274.8	336.8
Global Banking
Revenue from External Customer [Line Items]
Net sales	253.2	409.0	580.3	1,511.0	1,733.3
Global Banking | Operating Segments [Member]
Revenue from External Customer [Line Items]
Net sales	253.2	409.0	580.3	1,511.0	1,733.3
Global Banking | Service [Member]
Revenue from External Customer [Line Items]
Net sales	173.0	228.4	379.9	954.3	1,152.9
Global Banking | Product
Revenue from External Customer [Line Items]
Net sales	80.2	180.6	200.4	556.7	580.4
Other Segments
Revenue from External Customer [Line Items]
Net sales	1.2	1.7	5.1	10.9	16.2
Other Segments | Service [Member]
Revenue from External Customer [Line Items]
Net sales	0.9	1.1	4.0	5.5	7.4
Other Segments | Product
Revenue from External Customer [Line Items]
Net sales	$ 0.3	$ 0.6	$ 1.1	$ 5.4	$ 8.8