v3.26.1
Business Acquisitions - Pro Forma (Details) - Trans Union de Mexico, S.A., S.I.C. - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Business Combination [Line Items]    
Pro-forma revenue $ 1,278.8 $ 1,133.4
Pro-forma net income attributable to TransUnion $ 159.6 $ 383.0