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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Deferred revenue contract liabilities	$ 42.4		$ 45.7
Deferred revenue recognized	15.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Disaggregation of Revenue [Line Items]
Revenues to be recognized	$ 29.4
Revenues to be recognized, period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
Disaggregation of Revenue [Line Items]
Revenues to be recognized	$ 13.0
Revenues to be recognized, period	5 years
Sales Revenue \| Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenues, net (percent)	100.00%	100.00%
Contracts with customers \| Sales Revenue \| Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenues, net (percent)	86.00%	87.00%
Late Fees and Finance Charges \| Sales Revenue \| Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenues, net (percent)	4.00%	5.00%
Derivatives, Cross-Border Payments Business \| Sales Revenue \| Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenues, net (percent)	7.00%	7.00%
Float Revenue Earned On Invested Funds \| Sales Revenue \| Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenues, net (percent)	3.00%	1.00%