Annual report pursuant to Section 13 and 15(d)

REVENUE (Details)

v3.24.0.1
REVENUE (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disaggregation of Revenue [Line Items]      
Operating revenue $ 5,265.2 $ 5,122.2 $ 4,923.9
Change in operating revenue 143.0 $ 198.3  
Change in operating revenue (as a percent)   3.00% 4.00%
Canada      
Disaggregation of Revenue [Line Items]      
Operating revenue 259.6 $ 256.1 $ 250.0
Total Workforce Solutions      
Disaggregation of Revenue [Line Items]      
Operating revenue 2,315.8 2,325.4 $ 2,035.4
Change in operating revenue (9.6) $ 290.0  
Change in operating revenue (as a percent)   0.00% 14.00%
Total Workforce Solutions | Verification Services      
Disaggregation of Revenue [Line Items]      
Operating revenue 1,846.2 $ 1,871.0 $ 1,608.9
Change in operating revenue (24.8) $ 262.1  
Change in operating revenue (as a percent)   (1.00%) 16.00%
Total Workforce Solutions | Employer Services      
Disaggregation of Revenue [Line Items]      
Operating revenue 469.6 $ 454.4 $ 426.5
Change in operating revenue 15.2 $ 27.9  
Change in operating revenue (as a percent)   3.00% 7.00%
Total U.S. Information Solutions      
Disaggregation of Revenue [Line Items]      
Operating revenue 1,720.4 $ 1,657.7 $ 1,786.7
Change in operating revenue 62.7 $ (129.0)  
Change in operating revenue (as a percent)   4.00% (7.00%)
Total U.S. Information Solutions | Online Information Solutions      
Disaggregation of Revenue [Line Items]      
Operating revenue 1,375.2 $ 1,295.4 $ 1,349.8
Change in operating revenue 79.8 $ (54.4)  
Change in operating revenue (as a percent)   6.00% (4.00%)
Total U.S. Information Solutions | Mortgage Solutions      
Disaggregation of Revenue [Line Items]      
Operating revenue 113.7 $ 138.3 $ 190.4
Change in operating revenue (24.6) $ (52.1)  
Change in operating revenue (as a percent)   (18.00%) (27.00%)
Total U.S. Information Solutions | Financial Marketing Services      
Disaggregation of Revenue [Line Items]      
Operating revenue 231.5 $ 224.0 $ 246.5
Change in operating revenue 7.5 $ (22.5)  
Change in operating revenue (as a percent)   3.00% (9.00%)
International      
Disaggregation of Revenue [Line Items]      
Operating revenue 1,229.0 $ 1,139.1 $ 1,101.8
Change in operating revenue 89.9 $ 37.3  
Change in operating revenue (as a percent)   8.00% 3.00%
International | Asia Pacific      
Disaggregation of Revenue [Line Items]      
Operating revenue 345.3 $ 348.4 $ 356.0
Change in operating revenue (3.1) $ (7.6)  
Change in operating revenue (as a percent)   (1.00%) (2.00%)
International | Europe      
Disaggregation of Revenue [Line Items]      
Operating revenue 333.2 $ 327.8 $ 319.9
Change in operating revenue 5.4 $ 7.9  
Change in operating revenue (as a percent)   2.00% 2.00%
International | Latin America      
Disaggregation of Revenue [Line Items]      
Operating revenue 290.9 $ 206.8 $ 175.9
Change in operating revenue 84.1 $ 30.9  
Change in operating revenue (as a percent)   41.00% 18.00%
International | Canada      
Disaggregation of Revenue [Line Items]      
Operating revenue 259.6 $ 256.1 $ 250.0
Change in operating revenue $ 3.5 $ 6.1  
Change in operating revenue (as a percent)   1.00% 2.00%