RELATED PERSON TRANSACTIONS - Sports Programming Rights (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Aug. 23, 2019 professional_team
Related Party Transaction [Line Items]
Sports programming rights payments			$ 1,124	$ 118
Sports Teams Affiliates | RSNs
Related Party Transaction [Line Items]
Sports programming rights payments	$ 15	$ 38	$ 221
Number of sports rights agreements assumed | professional_team					6