GOODWILL, INDEFINITE-LIVED INTANGIBLE ASSETS AND OTHER INTANGIBLE ASSETS - Change in Carrying Amount of Indefinite-lived Intangible Assets (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)
Carrying amount of our broadcast licenses
Beginning balance	$ 158
Acquisition / Disposition	13
Ending balance	171
Consolidated VIEs
Carrying amount of our broadcast licenses
Beginning balance	14
Ending balance	14
Broadcast
Carrying amount of our broadcast licenses
Beginning balance	131
Acquisition / Disposition	13
Ending balance	144
Other
Carrying amount of our broadcast licenses
Beginning balance	27
Acquisition / Disposition	0
Ending balance	$ 27