Annual report pursuant to Section 13 and 15(d)

GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Amount of Goodwill (Details)

v3.25.0.1
GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Amount of Goodwill (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Goodwill [Roll Forward]    
Beginning Balance $ 6,829.9 $ 6,383.9
Acquisitions   410.4
Adjustments to initial purchase price allocation (68.7) 2.8
Foreign currency translation (213.4) 32.8
Ending Balance 6,547.8 6,829.9
Workforce Solutions    
Goodwill [Roll Forward]    
Beginning Balance 2,520.2 2,520.8
Acquisitions   0.0
Adjustments to initial purchase price allocation 0.0 (0.7)
Foreign currency translation (0.4) 0.1
Ending Balance 2,519.8 2,520.2
U.S. Information Solutions    
Goodwill [Roll Forward]    
Beginning Balance 2,006.2 2,004.8
Acquisitions   0.0
Adjustments to initial purchase price allocation 0.0 1.4
Foreign currency translation 0.0 0.0
Ending Balance 2,006.2 2,006.2
International    
Goodwill [Roll Forward]    
Beginning Balance 2,303.5 1,858.3
Acquisitions   410.4
Adjustments to initial purchase price allocation (68.7) 2.1
Foreign currency translation (213.0) 32.7
Ending Balance $ 2,021.8 $ 2,303.5