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INCOME TAXES (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
USD ($)
case
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2022
USD ($)
case
Jun. 30, 2021
Nov. 29, 2018
case
GAAP effective tax rate 28.20% 41.10%   (134.80%) 34.80%  
Goodwill impairment charge $ 460.1     $ 460.1    
UK Tax rate   25.00% 19.00%      
Number of cases before the U.S. Tax Court | case 2     2   3
ErisX            
Goodwill impairment charge       $ 460.1