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INCOME TAXES - (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income taxes        
Undistributed earnings in subsidiaries   $ 116.6    
Operating loss carryforwards   $ 16.7    
Operating loss carryforwards expiration period   20 years    
Unrecognized tax positions that would affect the annual effective tax rate   $ 196.6 $ 177.1 $ 162.1
Lapse of statute of limitations and potential audit settlements   1.7 1.0 6.2
Estimated interest costs and penalties   14.3 39.1 9.7
Accrued interest and penalties   88.5 $ 74.4 $ 35.8
Capital Loss Carryforwards        
Income taxes        
Capital loss forwards which, if unused, will expire in 2024   $ 5.0    
Forecast        
Income taxes        
Lapse of statute of limitations and potential audit settlements $ 49.9