Annual report pursuant to Section 13 and 15(d)

REVENUE (Details)

v3.25.0.1
REVENUE (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disaggregation of Revenue [Line Items]      
Operating revenue $ 5,681.1 $ 5,265.2 $ 5,122.2
Change in operating revenue 415.9 $ 143.0  
Change in operating revenue (as a percent)   8.00% 3.00%
Canada      
Disaggregation of Revenue [Line Items]      
Operating revenue 264.9 $ 259.6 $ 256.1
Total Workforce Solutions      
Disaggregation of Revenue [Line Items]      
Operating revenue 2,433.8 2,315.8 $ 2,325.4
Change in operating revenue 118.0 $ (9.6)  
Change in operating revenue (as a percent)   5.00% 0.00%
Total Workforce Solutions | Verification Services      
Disaggregation of Revenue [Line Items]      
Operating revenue 2,021.9 $ 1,846.2 $ 1,871.0
Change in operating revenue 175.7 $ (24.8)  
Change in operating revenue (as a percent)   10.00% (1.00%)
Total Workforce Solutions | Employer Services      
Disaggregation of Revenue [Line Items]      
Operating revenue 411.9 $ 469.6 $ 454.4
Change in operating revenue (57.7) $ 15.2  
Change in operating revenue (as a percent)   (12.00%) 3.00%
Total U.S. Information Solutions      
Disaggregation of Revenue [Line Items]      
Operating revenue 1,893.0 $ 1,720.4 $ 1,657.7
Change in operating revenue 172.6 $ 62.7  
Change in operating revenue (as a percent)   10.00% 4.00%
Total U.S. Information Solutions | Online Information Solutions      
Disaggregation of Revenue [Line Items]      
Operating revenue 1,501.2 $ 1,375.2 $ 1,295.4
Change in operating revenue 126.0 $ 79.8  
Change in operating revenue (as a percent)   9.00% 6.00%
Total U.S. Information Solutions | Mortgage Solutions      
Disaggregation of Revenue [Line Items]      
Operating revenue 149.4 $ 113.7 $ 138.3
Change in operating revenue 35.7 $ (24.6)  
Change in operating revenue (as a percent)   31.00% (18.00%)
Total U.S. Information Solutions | Financial Marketing Services      
Disaggregation of Revenue [Line Items]      
Operating revenue 242.4 $ 231.5 $ 224.0
Change in operating revenue 10.9 $ 7.5  
Change in operating revenue (as a percent)   5.00% 3.00%
Total International      
Disaggregation of Revenue [Line Items]      
Operating revenue 1,354.3 $ 1,229.0 $ 1,139.1
Change in operating revenue 125.3 $ 89.9  
Change in operating revenue (as a percent)   10.00% 8.00%
Total International | Latin America      
Disaggregation of Revenue [Line Items]      
Operating revenue 384.9 $ 290.9 $ 206.8
Change in operating revenue 94.0 $ 84.1  
Change in operating revenue (as a percent)   32.00% 41.00%
Total International | Europe      
Disaggregation of Revenue [Line Items]      
Operating revenue 369.2 $ 333.2 $ 327.8
Change in operating revenue 36.0 $ 5.4  
Change in operating revenue (as a percent)   11.00% 2.00%
Total International | Asia Pacific      
Disaggregation of Revenue [Line Items]      
Operating revenue 335.4 $ 345.3 $ 348.4
Change in operating revenue (9.9) $ (3.1)  
Change in operating revenue (as a percent)   (3.00%) (1.00%)
Total International | Canada      
Disaggregation of Revenue [Line Items]      
Operating revenue 264.8 $ 259.6 $ 256.1
Change in operating revenue $ 5.2 $ 3.5  
Change in operating revenue (as a percent)   2.00% 1.00%