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Segment Analysis - Narrative (Details)
market in Thousands
 3 Months Ended
Dec. 31, 2024
employee
currency
market
country
Segment Reporting Information [Line Items]  
Number of employees (more than) | employee 4,600
Number of countries over entity operates (more than) 180
Self-Directed/Retail  
Segment Reporting Information [Line Items]  
Number of global financial markets (more than) | market 18
Payments  
Segment Reporting Information [Line Items]  
Number of countries over entity operates (more than) 180
Number of different types of foreign currencies (more then) | currency 140