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 6 Months Ended 9 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]          
Impairment of intangible assets, indefinite-lived         $ 0
Amortization expense related to purchased intangible assets $ 40,100,000 $ 34,800,000 $ 79,500,000 $ 69,800,000