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Legal Matters - Additional Information (Details) $ in Millions		3 Months Ended
	Dec. 19, 2024	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 13, 2024 lawsuit	Nov. 26, 2024 lawsuit
Interchange Multidistrict Litigation
Loss Contingencies [Line Items]
Settlement percentage		74.00%
Europe Merchant Litigation
Loss Contingencies [Line Items]
Merchant damages limitation, period prior to claim filing	6 years
U.S. Debit Class Actions
Loss Contingencies [Line Items]
Number of class action lawsuits, seeking consolidation				3	4
Number of lawsuits in which the court was transferred				2
U.S. Covered Litigation
Loss Contingencies [Line Items]
Provision for legal matters | $		$ 27	$ 0

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