Settlement Assets and Obligations - Summary of Activity in the Allowance for Credit Losses (Details) - USD ($) $ in Millions |
3 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Jun. 30, 2026 |
Mar. 31, 2026 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
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| Summary of activity in allowance for credit losses | ||||||||||||||
| Allowance for credit losses, Beginning Balance | $ 17.9 | |||||||||||||
| Allowance for credit losses, Ending Balance | $ 14.7 | |||||||||||||
| Receivables from agents and others | ||||||||||||||
| Summary of activity in allowance for credit losses | ||||||||||||||
| Allowance for credit losses, Beginning Balance | 15.9 | $ 17.2 | 17.9 | $ 13.1 | $ 18.5 | $ 24.7 | ||||||||
| Current period provision for expected credit losses | 3.9 | 3.6 | [1] | 6.2 | [1] | 5.4 | [1] | 4.6 | [1] | (3.8) | [1] | |||
| Write-offs charged against the allowance | (8.0) | [1] | (7.1) | (9.3) | (5.8) | (13.2) | (10.4) | |||||||
| Recoveries of amounts previously written off | 3.0 | 2.1 | 2.6 | 3.9 | 2.2 | 7.8 | ||||||||
| Impacts of foreign currency exchange rates and other | (0.1) | 0.1 | (0.2) | 0.1 | 1.0 | 0.2 | ||||||||
| Allowance for credit losses, Ending Balance | $ 14.7 | $ 15.9 | $ 17.2 | $ 16.7 | $ 13.1 | $ 18.5 | ||||||||
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