Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Summary of Segment Information
Total revenue	$ 895.4	$ 858.1
Operating profit (loss)	23.8	(2.1)
Impairment of assets	0.0	(0.9)
Amortization of fair value assets	(24.2)	(17.7)
Restructuring and transformation expenses	(36.7)	(15.0)
Other income (expense)	(38.0)	(88.2)
Loss before taxes	(14.2)	(90.3)
Operating Segments
Summary of Segment Information
Operating profit (loss)	152.1	119.0
Segment Reconciling Items
Summary of Segment Information
Total revenue	0.0	4.8
Operating profit (loss)	0.0	(3.7)
Impairment of assets	0.0	(0.9)
Amortization of fair value assets	(22.9)	(17.7)
Restructuring and transformation expenses	(36.7)	(15.0)
Refinancing related costs	(6.9)	(14.1)
Net non-routine income (expense)	1.1	(0.7)
Corporate, Non-Segment
Summary of Segment Information
Operating profit (loss)	(62.9)	(69.0)
Consolidation, Eliminations
Summary of Segment Information
Reconciliation of operating profit (loss) from segments to consolidated	(128.3)	(121.1)
Banking | Operating Segments
Summary of Segment Information
Total revenue	648.8	592.9
Operating profit (loss)	116.4	79.9
Retail | Operating Segments
Summary of Segment Information
Total revenue	246.6	260.4
Operating profit (loss)	$ 35.7	$ 39.1