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LEASES. (Schedule of future minimum lease payments) (Details) - USD ($)
$ in Millions
Sep. 30, 2019
Dec. 31, 2018
Leases [Abstract]    
Fourth quarter 2019 $ 6.8  
2020 26.1  
2021 25.6  
2022 22.8  
2023 20.3  
Thereafter 63.4  
Total future undiscounted cash flows 165.0  
Less: imputed interest to be recognized in lease expense (18.6)  
Operating lease liabilities $ 146.4 $ 0.0