Annual report pursuant to Section 13 and 15(d)

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

v3.22.4
GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Amount of Goodwill (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Goodwill [Roll Forward]    
Beginning Balance $ 6,258.1 $ 4,495.8
Acquisitions 283.8 1,842.0
Adjustments to initial purchase price allocation 0.1 0.7
Foreign currency translation (133.5) (79.1)
Divestitures (24.6) (1.3)
Ending Balance 6,383.9 6,258.1
Workforce Solutions    
Goodwill [Roll Forward]    
Beginning Balance 2,365.4 1,023.3
Acquisitions 145.0 1,342.1
Adjustments to initial purchase price allocation 10.7 0.0
Foreign currency translation (0.3) 0.0
Divestitures 0.0 0.0
Ending Balance 2,520.8 2,365.4
U.S. Information Solutions    
Goodwill [Roll Forward]    
Beginning Balance 1,900.1 1,417.9
Acquisitions 111.8 481.5
Adjustments to initial purchase price allocation (7.1) 0.7
Foreign currency translation 0.0 0.0
Divestitures 0.0 0.0
Ending Balance 2,004.8 1,900.1
International    
Goodwill [Roll Forward]    
Beginning Balance 1,992.6 2,054.6
Acquisitions 27.0 18.4
Adjustments to initial purchase price allocation (3.5) 0.0
Foreign currency translation (133.2) (79.1)
Divestitures (24.6) (1.3)
Ending Balance $ 1,858.3 $ 1,992.6