Quarterly report [Sections 13 or 15(d)]

REVENUE - Disaggregation of Revenue (Details)

v3.26.1
REVENUE - Disaggregation of Revenue (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disaggregation of Revenue [Line Items]    
Operating revenue $ 1,648.9 $ 1,442.0
Change in revenue $ 206.9  
Change in revenue (as a percent) 14.00%  
Operating Segments    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 1,648.9 1,442.0
Workforce Solutions    
Disaggregation of Revenue [Line Items]    
Change in revenue $ 64.5  
Change in revenue (as a percent) 10.00%  
Workforce Solutions | Operating Segments    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 683.1 618.6
Workforce Solutions | Verification Services    
Disaggregation of Revenue [Line Items]    
Operating revenue 571.4 502.2
Change in revenue $ 69.2  
Change in revenue (as a percent) 14.00%  
Workforce Solutions | Employer Services    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 111.7 116.4
Change in revenue $ (4.7)  
Change in revenue (as a percent) (4.00%)  
U.S. Information Solutions    
Disaggregation of Revenue [Line Items]    
Change in revenue $ 105.7  
Change in revenue (as a percent) 21.00%  
U.S. Information Solutions | Operating Segments    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 605.6 499.9
U.S. Information Solutions | Online Information Solutions    
Disaggregation of Revenue [Line Items]    
Operating revenue 553.7 448.1
Change in revenue $ 105.6  
Change in revenue (as a percent) 24.00%  
U.S. Information Solutions | Financial Marketing Services    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 51.9 51.8
Change in revenue $ 0.1  
Change in revenue (as a percent) 0.00%  
International    
Disaggregation of Revenue [Line Items]    
Change in revenue $ 36.7  
Change in revenue (as a percent) 11.00%  
International | Operating Segments    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 360.2 323.5
International | Latin America    
Disaggregation of Revenue [Line Items]    
Operating revenue 102.7 94.2
Change in revenue $ 8.5  
Change in revenue (as a percent) 9.00%  
International | Europe    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 94.0 86.6
Change in revenue $ 7.4  
Change in revenue (as a percent) 9.00%  
International | Asia Pacific    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 92.6 79.7
Change in revenue $ 12.9  
Change in revenue (as a percent) 16.00%  
International | Canada    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 70.9 $ 63.0
Change in revenue $ 7.9  
Change in revenue (as a percent) 12.00%