Acquired Card Receivables - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Acquired Card Receivables [Abstract]
Acquired card receivable as collateral	$ 490.8		$ 490.8
Authorized transactions but not cleared	69.1		$ 69.1
Grace period to payment on acquired card receivables			5 days
Card receivables acquired during the period	$ 6,600.0	$ 5,300.0	$ 19,400.0	$ 15,700.0
Release of provision for expected credit losses			$ 5.7