Settlement Assets and Obligations - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2025 |
Dec. 31, 2024 |
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Variable rate demand notes, maximum maturity year | 2045 | |
| Due after 10 years | $ 422.0 | |
| Other Assets | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Advances to agents | 221.8 | $ 209.1 |
| State and municipal variable-rate demand notes | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Due after 10 years | $ 1.4 |