Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
GOODWILL AND OTHER INTANGIBLE ASSETS (Changes in Amount of Goodwill) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Goodwill [Roll Forward]    
Beginning Balance $ 3,974.3 $ 2,571.0
Acquisitions 92.4 1,456.3
Adjustments to initial purchase price allocation 1.0 (6.4)
Foreign currency translation 116.3 (46.6)
Ending Balance 4,184.0 3,974.3
U.S. Information Solutions    
Goodwill [Roll Forward]    
Beginning Balance 1,071.3 1,071.3
Acquisitions 0.0 0.0
Adjustments to initial purchase price allocation 0.0 0.0
Foreign currency translation 0.0 0.0
Ending Balance 1,071.3 1,071.3
International    
Goodwill [Roll Forward]    
Beginning Balance 1,814.6 441.5
Acquisitions 43.9 1,411.6
Adjustments to initial purchase price allocation 1.0 (6.2)
Foreign currency translation 109.9 (32.3)
Ending Balance 1,969.4 1,814.6
Workforce Solutions    
Goodwill [Roll Forward]    
Beginning Balance 952.1 907.6
Acquisitions 0.0 44.7
Adjustments to initial purchase price allocation 0.0 (0.2)
Foreign currency translation 0.0 0.0
Ending Balance 952.1 952.1
Global Consumer Solutions    
Goodwill [Roll Forward]    
Beginning Balance 136.3 150.6
Acquisitions 48.5 0.0
Adjustments to initial purchase price allocation 0.0 0.0
Foreign currency translation 6.4 (14.3)
Ending Balance $ 191.2 $ 136.3