GOODWILL AND INTANGIBLE ASSETS, NET - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill impairment charge	$ 0	$ 0	$ 0	$ 111,000,000
Finite-lived intangible assets impairment	0	0	0	0
Indefinite-lived intangible assets impairment	0	0	0	33,100,000
Amortization expense	$ 9,100,000	$ 8,300,000	$ 26,100,000	$ 25,000,000