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GOODWILL AND OTHER INTANGIBLES - Additional information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]              
Amortization of intangible assets $ 35.7 $ 36.8 $ 72.0 $ 72.2 $ 145.8 $ 156.6 $ 224.8
2020         145.2    
2021         145.9    
2022         137.9    
2023         133.2    
2024         $ 133.0