Quarterly report pursuant to Section 13 or 15(d)

REVENUE - Disaggregation of Revenue (Details)

v3.20.1
REVENUE - Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Disaggregation of Revenue [Line Items]    
Operating revenue $ 957.9 $ 846.1
Change in revenue $ 111.8  
Change in revenue (as a percent) 13.00%  
Operating Segments | U.S. Information Solutions    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 343.2 298.3
Change in revenue $ 44.9  
Change in revenue (as a percent) 15.00%  
Operating Segments | U.S. Information Solutions | Online Information Solutions    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 252.8 217.7
Change in revenue $ 35.1  
Change in revenue (as a percent) 16.00%  
Operating Segments | U.S. Information Solutions | Mortgage Solutions    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 42.8 32.2
Change in revenue $ 10.6  
Change in revenue (as a percent) 33.00%  
Operating Segments | U.S. Information Solutions | Financial Marketing Services    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 47.6 48.4
Change in revenue $ (0.8)  
Change in revenue (as a percent) (2.00%)  
Operating Segments | Workforce Solutions    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 301.6 228.5
Change in revenue $ 73.1  
Change in revenue (as a percent) 32.00%  
Operating Segments | Workforce Solutions | Verification Services    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 220.2 148.9
Change in revenue $ 71.3  
Change in revenue (as a percent) 48.00%  
Operating Segments | Workforce Solutions | Employer Services    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 81.4 79.6
Change in revenue $ 1.8  
Change in revenue (as a percent) 2.00%  
Operating Segments | International    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 216.0 225.1
Change in revenue $ (9.1)  
Change in revenue (as a percent) (4.00%)  
Operating Segments | International | Asia Pacific    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 69.7 73.1
Change in revenue $ (3.4)  
Change in revenue (as a percent) (5.00%)  
Operating Segments | International | Europe    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 66.4 68.5
Change in revenue $ (2.1)  
Change in revenue (as a percent) (3.00%)  
Operating Segments | International | Latin America    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 43.2 47.2
Change in revenue $ (4.0)  
Change in revenue (as a percent) (8.00%)  
Operating Segments | International | Canada    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 36.7 36.3
Change in revenue $ 0.4  
Change in revenue (as a percent) 1.00%  
Operating Segments | Global Consumer Solutions    
Disaggregation of Revenue [Line Items]    
Operating revenue $ 97.1 $ 94.2
Change in revenue $ 2.9  
Change in revenue (as a percent) 3.00%