Quarterly report [Sections 13 or 15(d)]

REVENUE - Disaggregation of Revenue (Details)

v3.25.2
REVENUE - Disaggregation of Revenue (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Disaggregation of Revenue [Line Items]        
Operating revenue $ 1,537.0 $ 1,430.5 $ 2,979.0 $ 2,819.9
Change in revenue $ 106.5   $ 159.1  
Change in revenue (as a percent) 7.00%   6.00%  
Operating Segments        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 1,537.0 1,430.5 $ 2,979.0 2,819.9
Workforce Solutions        
Disaggregation of Revenue [Line Items]        
Change in revenue $ 49.2   $ 65.0  
Change in revenue (as a percent) 8.00%   5.00%  
Workforce Solutions | Operating Segments        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 662.1 612.9 $ 1,280.7 1,215.7
Workforce Solutions | Verification Services        
Disaggregation of Revenue [Line Items]        
Operating revenue 567.1 515.9 1,069.3 992.3
Change in revenue $ 51.2   $ 77.0  
Change in revenue (as a percent) 10.00%   8.00%  
Workforce Solutions | Employer Services        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 95.0 97.0 $ 211.4 223.4
Change in revenue $ (2.0)   $ (12.0)  
Change in revenue (as a percent) (2.00%)   (5.00%)  
U.S. Information Solutions        
Disaggregation of Revenue [Line Items]        
Change in revenue $ 43.2   $ 77.7  
Change in revenue (as a percent) 9.00%   8.00%  
U.S. Information Solutions | Operating Segments        
Disaggregation of Revenue [Line Items]        
Operating revenue     $ 1,021.3 943.6
U.S. Information Solutions | Online Information Solutions        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 457.8 418.2 905.9 836.4
Change in revenue $ 39.6   $ 69.5  
Change in revenue (as a percent) 9.00%   8.00%  
U.S. Information Solutions | Financial Marketing Services        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 63.7 60.1 $ 115.4 107.2
Change in revenue $ 3.6   $ 8.2  
Change in revenue (as a percent) 6.00%   8.00%  
International        
Disaggregation of Revenue [Line Items]        
Change in revenue $ 14.1   $ 16.4  
Change in revenue (as a percent) 4.00%   2.00%  
International | Operating Segments        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 353.4 339.3 $ 677.0 660.6
International | Latin America        
Disaggregation of Revenue [Line Items]        
Operating revenue 99.6 97.3 193.8 188.4
Change in revenue $ 2.3   $ 5.4  
Change in revenue (as a percent) 2.00%   3.00%  
International | Europe        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 99.2 88.2 $ 185.7 174.4
Change in revenue $ 11.0   $ 11.3  
Change in revenue (as a percent) 12.00%   7.00%  
International | Asia Pacific        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 85.3 84.6 $ 165.0 162.9
Change in revenue $ 0.7   $ 2.1  
Change in revenue (as a percent) 1.00%   1.00%  
International | Canada        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 69.3 $ 69.2 $ 132.5 $ 134.9
Change in revenue $ 0.1   $ (2.4)  
Change in revenue (as a percent) 0.00%   (2.00%)