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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Deferred revenue contract liability	$ 36.7		$ 39.0
Revenue recognized from deferred	14.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-04-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, amount	$ 27.9
Revenue, remaining performance obligation, expected timing of satisfaction, period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligation, amount	$ 8.8
Revenue, remaining performance obligation, expected timing of satisfaction, period	5 years
Sales Revenue \| Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	100.00%	100.00%
Contracts with Customers \| Sales Revenue \| Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	86.00%	86.00%
Derivatives, Cross-Border Payments Business \| Sales Revenue \| Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	7.00%	7.00%
Late Fees and Finance Charges \| Sales Revenue \| Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	4.00%	4.00%
Float Revenue Earned On Invested Funds \| Sales Revenue \| Product Concentration Risk
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	3.00%	3.00%