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Revenue - Narrative (Details)
$ in Millions
 3 Months Ended
Mar. 31, 2022
USD ($)
Item
Mar. 31, 2021
USD ($)
Revenue    
Revenues from contracts with customers | $ $ 1,100.7 $ 1,166.3
Consumer money transfers    
Revenue    
Revenues from contracts with customers | $ $ 976.8 1,038.4
Number of performance obligations | Item 1  
Number of integrated services involved in a transaction | Item 1  
Consumer bill payments    
Revenue    
Revenues from contracts with customers | $ $ 42.6 $ 37.8
Number of integrated services involved in a transaction | Item 1