v3.26.3
Segment Information - Schedule of Other Segment Reportable Income and Expense Information (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Segment Reporting [Line Items]        
Operating interest expense $ 33.2 $ 29.2 $ 89.5 $ 82.0
Mobility        
Segment Reporting [Line Items]        
Interest income 4.2 3.9 15.0 12.0
Operating interest expense 25.1 22.2 69.0 63.1
Depreciation 17.6 16.3 49.6 46.5
Benefits        
Segment Reporting [Line Items]        
Interest income 59.7 51.6 174.1 144.4
Operating interest expense 1.5 1.3 4.3 3.8
Depreciation 11.5 9.4 32.7 27.6
Corporate Payments        
Segment Reporting [Line Items]        
Interest income 3.0 3.4 8.8 10.1
Operating interest expense 6.6 5.7 16.2 15.1
Depreciation $ 9.5 $ 9.1 $ 27.5 $ 26.9