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Commitments and Contingencies - Narrative (Details) € in Millions, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 USD ($) | Dec. 31, 2019 EUR (€) | Dec. 31, 2018 EUR (€) | Dec. 31, 2017 EUR (€) Individual
Commitments and Contingencies |  |  |  |
Letters of credit outstanding and bank guarantees | $ 150.0 |  |  |
Number of individuals filed lawsuit | Individual |  |  |  | 6
Damages sought, value | € |  |  |  | € 22.4
Judgement Against Defendants |  |  |  |
Commitments and Contingencies |  |  |  |
Court judgment against company, value | 11.3 |  | € 10.5 |
Judgment Against The Western Union Company |  |  |  |
Commitments and Contingencies |  |  |  |
Court judgment against company, value | 9.7 | € 9.0 |  |
Pending Litigation |  |  |  |
Commitments and Contingencies |  |  |  |
Range of possible loss, portion not accrued | $ 30.0 |  |  |

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