Quarterly report [Sections 13 or 15(d)]

REVENUE - Schedule of Disaggregation of Revenue (Details)

v3.26.3
REVENUE - Schedule of Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Disaggregation of Revenue [Line Items]        
Operating revenue $ 1,692.5 $ 1,544.9 $ 5,041.5 $ 4,523.9
Change in revenue $ 147.6   $ 517.6  
Change in revenue (as a percent) 10.00%   11.00%  
Operating Segments        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 1,692.5 1,544.9 $ 5,041.5 4,523.9
Workforce Solutions        
Disaggregation of Revenue [Line Items]        
Change in revenue $ 44.5   $ 152.3  
Change in revenue (as a percent) 7.00%   8.00%  
Workforce Solutions | Operating Segments        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 693.9 649.4 $ 2,082.4 1,930.1
Workforce Solutions | Verification Services        
Disaggregation of Revenue [Line Items]        
Operating revenue 603.2 553.6 1,782.2 1,622.9
Change in revenue $ 49.6   $ 159.3  
Change in revenue (as a percent) 9.00%   10.00%  
Workforce Solutions | Employer Services        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 90.7 95.8 $ 300.2 307.2
Change in revenue $ (5.1)   $ (7.0)  
Change in revenue (as a percent) (5.00%)   (2.00%)  
U.S. Information Solutions        
Disaggregation of Revenue [Line Items]        
Change in revenue $ 68.9   $ 264.7  
Change in revenue (as a percent) 13.00%   17.00%  
U.S. Information Solutions | Operating Segments        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 599.1 530.2 $ 1,816.3 1,551.6
U.S. Information Solutions | Online Information Solutions        
Disaggregation of Revenue [Line Items]        
Operating revenue 529.7 467.5 1,628.8 1,373.5
Change in revenue $ 62.2   $ 255.3  
Change in revenue (as a percent) 13.00%   19.00%  
U.S. Information Solutions | Financial Marketing Services        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 69.4 62.7 $ 187.5 178.1
Change in revenue $ 6.7   $ 9.4  
Change in revenue (as a percent) 11.00%   5.00%  
International        
Disaggregation of Revenue [Line Items]        
Change in revenue $ 34.2   $ 100.6  
Change in revenue (as a percent) 9.00%   10.00%  
International | Operating Segments        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 399.5 365.3 $ 1,142.8 1,042.2
International | Latin America        
Disaggregation of Revenue [Line Items]        
Operating revenue 114.1 102.1 325.7 295.8
Change in revenue $ 12.0   $ 29.9  
Change in revenue (as a percent) 12.00%   10.00%  
International | Europe        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 105.5 102.3 $ 300.6 288.0
Change in revenue $ 3.2   $ 12.6  
Change in revenue (as a percent) 3.00%   4.00%  
International | Asia Pacific        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 107.7 90.1 $ 299.9 255.1
Change in revenue $ 17.6   $ 44.8  
Change in revenue (as a percent) 20.00%   18.00%  
International | Canada        
Disaggregation of Revenue [Line Items]        
Operating revenue $ 72.2 $ 70.8 $ 216.6 $ 203.3
Change in revenue $ 1.4   $ 13.3  
Change in revenue (as a percent) 2.00%   7.00%