Quarterly report [Sections 13 or 15(d)]

REVENUE - Schedule of Disaggregation of Revenue (Details)

v3.26.1
REVENUE - Schedule of Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Disaggregation of Revenue [Line Items]        
Operating revenue $ 1,700.1 $ 1,537.0 $ 3,349.0 $ 2,979.0
Change in revenue $ 163.1   $ 370.0  
Change in revenue (as a percent) 11.00%   12.00%  
Operating Segments        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 1,700.1 1,537.0 $ 3,349.0 2,979.0
Workforce Solutions        
Disaggregation of Revenue [Line Items]        
Change in revenue $ 43.3   $ 107.8  
Change in revenue (as a percent) 7.00%   8.00%  
Workforce Solutions | Operating Segments        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 705.4 662.1 $ 1,388.5 1,280.7
Workforce Solutions | Verification Services        
Disaggregation of Revenue [Line Items]        
Operating revenue 607.6 567.1 1,179.0 1,069.3
Change in revenue $ 40.5   $ 109.7  
Change in revenue (as a percent) 7.00%   10.00%  
Workforce Solutions | Employer Services        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 97.8 95.0 $ 209.5 211.4
Change in revenue $ 2.8   $ (1.9)  
Change in revenue (as a percent) 3.00%   (1.00%)  
U.S. Information Solutions        
Disaggregation of Revenue [Line Items]        
Change in revenue $ 90.1   $ 195.9  
Change in revenue (as a percent) 17.00%   19.00%  
U.S. Information Solutions | Operating Segments        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 611.6 521.5 $ 1,217.2 1,021.3
U.S. Information Solutions | Online Information Solutions        
Disaggregation of Revenue [Line Items]        
Operating revenue 545.4 457.8 1,099.1 905.9
Change in revenue $ 87.6   $ 193.2  
Change in revenue (as a percent) 19.00%   21.00%  
U.S. Information Solutions | Financial Marketing Services        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 66.2 63.7 $ 118.1 115.4
Change in revenue $ 2.5   $ 2.7  
Change in revenue (as a percent) 4.00%   2.00%  
International        
Disaggregation of Revenue [Line Items]        
Change in revenue $ 29.7   $ 66.3  
Change in revenue (as a percent) 8.00%   10.00%  
International | Operating Segments        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 383.1 353.4 $ 743.3 677.0
International | Latin America        
Disaggregation of Revenue [Line Items]        
Operating revenue 109.0 99.6 211.7 193.8
Change in revenue $ 9.4   $ 17.9  
Change in revenue (as a percent) 9.00%   9.00%  
International | Europe        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 101.1 99.2 $ 195.0 185.7
Change in revenue $ 1.9   $ 9.3  
Change in revenue (as a percent) 2.00%   5.00%  
International | Asia Pacific        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 99.7 85.3 $ 192.3 165.0
Change in revenue $ 14.4   $ 27.3  
Change in revenue (as a percent) 17.00%   17.00%  
International | Canada        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 73.3 $ 69.3 $ 144.3 $ 132.5
Change in revenue $ 4.0   $ 11.8  
Change in revenue (as a percent) 6.00%   9.00%