Restructuring - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Restructuring - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 34.5	$ 12.6	$ 78.2	$ 48.9
Operational Evolution Program (OEP)
Restructuring Cost and Reserve [Line Items]
Expected costs to be incurred					$ 125.0
Cumulative restructuring charges	105.1		105.1
Operational Evolution Program (OEP) \| Banking
Restructuring Cost and Reserve [Line Items]
Expected costs to be incurred					55.0
Cumulative restructuring charges	52.8		52.8
Restructuring charges	18.1		38.0
Operational Evolution Program (OEP) \| Retail
Restructuring Cost and Reserve [Line Items]
Expected costs to be incurred					$ 19.0
Cumulative restructuring charges	16.9		16.9
Restructuring charges	$ 3.6		$ 11.9
Continuous Improvement Initiative \| Banking
Restructuring Cost and Reserve [Line Items]
Restructuring charges		0.8		9.9
Continuous Improvement Initiative \| Retail
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 2.0		$ 12.4

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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