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INCOME TAXES (Foreign Subsidiaries) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Contingency [Line Items]      
Accrued interest and penalties, net of reversals $ 4.6 $ (2.1) $ 11.9
Interest and penalties 20.3 15.8  
Repatriation of foreign earnings   150.0  
Tax on repatriated amounts 0.9 $ 3.4 $ 0.0
Tax cuts and jobs act of 2017, non-U.S. undistributed earnings 187.3    
Canadian Provincial      
Income Tax Contingency [Line Items]      
Total reassessment amount including interest 130.5    
Amount of security posted in the form of a performance bond 98.4    
Amount of security posted in the form of cash $ 38.2