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Revenue - Narrative (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2023
USD ($)
Item
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Revenue      
Revenues from contracts with customers | $ $ 4,158.0 $ 4,254.0 $ 4,865.5
Consumer money transfers      
Revenue      
Revenues from contracts with customers | $ $ 3,886.9 3,860.7 4,320.9
Number of performance obligations | Item 1    
Number of integrated services involved in a transaction | Item 1    
Consumer services      
Revenue      
Revenues from contracts with customers | $ $ 258.1 $ 259.7 $ 222.1
Number of integrated services involved in a transaction | Item 1