Annual report pursuant to Section 13 and 15(d)

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

v3.10.0.1
GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Amount of Goodwill (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Goodwill [Roll Forward]    
Beginning Balance $ 4,184.0 $ 3,974.3
Acquisitions 89.3 92.4
Adjustments to initial purchase price allocation 1.2 1.0
Foreign currency translation (144.8) 116.3
Ending Balance 4,129.7 4,184.0
U.S. Information Solutions    
Goodwill [Roll Forward]    
Beginning Balance 1,071.3 1,071.3
Acquisitions 57.7 0.0
Adjustments to initial purchase price allocation (0.1) 0.0
Foreign currency translation 0.0 0.0
Ending Balance 1,128.9 1,071.3
International    
Goodwill [Roll Forward]    
Beginning Balance 1,969.4 1,814.6
Acquisitions 14.5 43.9
Adjustments to initial purchase price allocation 1.3 1.0
Foreign currency translation (140.5) 109.9
Ending Balance 1,844.7 1,969.4
Workforce Solutions    
Goodwill [Roll Forward]    
Beginning Balance 952.1 952.1
Acquisitions 17.1 0.0
Adjustments to initial purchase price allocation 1.0 0.0
Foreign currency translation 0.0 0.0
Ending Balance 970.2 952.1
Global Consumer Solutions    
Goodwill [Roll Forward]    
Beginning Balance 191.2 136.3
Acquisitions 0.0 48.5
Adjustments to initial purchase price allocation (1.0) 0.0
Foreign currency translation (4.3) 6.4
Ending Balance $ 185.9 $ 191.2