v3.26.1
Settlement Assets and Obligations - Components of Investment Securities (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Cash and cash equivalents      
Amortized Cost $ 919.8 $ 1,234.4 $ 1,019.6
Available-for-sale securities:      
Fair Value 1,431.8    
Settlement Assets      
Available-for-sale securities:      
Amortized Cost 1,438.4 1,443.9  
Fair Value 1,431.8 1,445.1  
Gross Unrealized Gains 13.7 21.0  
Gross Unrealized Losses (20.3) (19.8)  
Net Unrealized Gains/ (Losses) (6.6) 1.2  
Amortized Cost 1,478.0 1,488.1  
Fair Value 1,471.4 1,489.3  
Gross Unrealized Gains 13.7 21.0  
Gross Unrealized Losses (20.3) (19.8)  
Net Unrealized Gains/ (Losses) (6.6) 1.2  
Money market funds | Settlement Assets      
Cash and cash equivalents      
Amortized Cost 39.6 44.2  
Fair Value 39.6 44.2  
State and municipal debt securities | Settlement Assets      
Available-for-sale securities:      
Amortized Cost [1] 1,092.3 1,137.2  
Fair Value [1] 1,082.8 1,131.4  
Gross Unrealized Gains [1] 9.1 12.5  
Gross Unrealized Losses [1] (18.6) (18.3)  
Net Unrealized Gains/ (Losses) [1] (9.5) (5.8)  
Asset-backed securities | Settlement Assets      
Available-for-sale securities:      
Amortized Cost 150.8 155.4  
Fair Value 151.9 157.8  
Gross Unrealized Gains 1.1 2.4  
Net Unrealized Gains/ (Losses) 1.1 2.4  
Corporate debt and other securities | Settlement Assets      
Available-for-sale securities:      
Amortized Cost 195.3 151.3  
Fair Value 197.1 155.9  
Gross Unrealized Gains 3.5 6.1  
Gross Unrealized Losses (1.7) (1.5)  
Net Unrealized Gains/ (Losses) $ 1.8 $ 4.6  
[1] The majority of these securities are fixed-rate instruments.