RESTRUCTURING - Narrative (Details) - USD ($) $ in Millions	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2023	Aug. 11, 2023	Dec. 31, 2025	Dec. 31, 2024
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 22.6	$ 38.9	$ 94.3	$ 106.1
Operational Evolution Program (OEP)
Restructuring Cost and Reserve [Line Items]
Expected costs to be incurred			80.0
Restructuring charges			26.9
Continuous Improvement Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges			67.4
Banking | Operational Evolution Program (OEP)
Restructuring Cost and Reserve [Line Items]
Expected costs to be incurred			25.0
Restructuring charges			10.0
Banking | Continuous Improvement Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges			15.4
Retail | Operational Evolution Program (OEP)
Restructuring Cost and Reserve [Line Items]
Expected costs to be incurred			13.0
Restructuring charges			2.9
Retail | Continuous Improvement Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 13.9