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Settlement Assets and Obligations - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Receivables from agents and others, net | $ 1,820.3 | $ 1,732.9
Variable rate demand notes, maximum maturity year | 2052 |
Due after 10 years | $ 289.7 |
Other Assets |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Advances to agents | 200.7 | 188.5
Receivables from agents and others |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Receivables from agents and others, net | 1,820.3 | $ 1,732.9
State and municipal variable-rate demand notes |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Due after 10 years | $ 47.7 |

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