Quarterly report pursuant to Section 13 or 15(d)

GOODWILL AND INTANGIBLE ASSETS - Narrative (Details)

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GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]        
Impairment of intangible assets, indefinite-lived     $ 0  
Amortization expense related to purchased intangible assets $ 35,100,000 $ 36,500,000 $ 104,900,000 $ 117,900,000