RELATED PERSON TRANSACTIONS - Equity Method Investees (Details) $ in Millions	1 Months Ended	12 Months Ended
	Aug. 31, 2019 renewal	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
YES Network
Related person transactions
Number of renewal terms | renewal	2
Renewal period	2 years
Management service fee		$ 5	$ 2
Mobile Production Businesses
Related person transactions
Amount paid		$ 19	$ 12