Acquired Card Receivables - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Acquired Card Receivables [Abstract]
Acquired card receivable as collateral	$ 247.2		$ 247.2
Authorized transactions but not cleared	75.8		$ 75.8
Grace period to payment on acquired card receivables			5 days
Release of provision for expected credit losses	5.7		$ 5.7
Card receivables acquired during the period	$ 5,300.0	$ 4,300.0	$ 15,700.0	$ 12,600.0