v3.26.1
Settlement Assets and Obligations - Components of Investment Securities (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Cash and cash equivalents      
Amortized Cost $ 909.2 $ 1,234.4 $ 1,289.0
Available-for-sale securities:      
Fair Value 1,446.5    
Settlement Assets      
Available-for-sale securities:      
Amortized Cost 1,450.7 1,443.9  
Fair Value 1,446.5 1,445.1  
Gross Unrealized Gains 16.5 21.0  
Gross Unrealized Losses (20.7) (19.8)  
Net Unrealized Gains/ (Losses) (4.2) 1.2  
Amortized Cost 1,508.2 1,488.1  
Fair Value 1,504.0 1,489.3  
Gross Unrealized Gains 16.5 21.0  
Gross Unrealized Losses (20.7) (19.8)  
Net Unrealized Gains/ (Losses) (4.2) 1.2  
Money market funds | Settlement Assets      
Cash and cash equivalents      
Amortized Cost 57.5 44.2  
Fair Value 57.5 44.2  
State and municipal debt securities | Settlement Assets      
Available-for-sale securities:      
Amortized Cost [1] 1,117.8 1,137.2  
Fair Value [1] 1,110.4 1,131.4  
Gross Unrealized Gains [1] 11.6 12.5  
Gross Unrealized Losses [1] (19.0) (18.3)  
Net Unrealized Gains/ (Losses) [1] (7.4) (5.8)  
Asset-backed securities | Settlement Assets      
Available-for-sale securities:      
Amortized Cost 151.9 155.4  
Fair Value 153.7 157.8  
Gross Unrealized Gains 1.8 2.4  
Net Unrealized Gains/ (Losses) 1.8 2.4  
Corporate debt and other securities | Settlement Assets      
Available-for-sale securities:      
Amortized Cost 181.0 151.3  
Fair Value 182.4 155.9  
Gross Unrealized Gains 3.1 6.1  
Gross Unrealized Losses (1.7) (1.5)  
Net Unrealized Gains/ (Losses) $ 1.4 $ 4.6  
[1] The majority of these securities are fixed-rate instruments.