Segment Analysis - Narrative (Details)	3 Months Ended
	Dec. 31, 2023 employee currency market country
Segment Reporting Information [Line Items]
Number of employees | employee	4,000
Number of countries over entity operates (more than)	180
Number of global financial markets (more than) | market	18,000
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