ACQUISITIONS AND DISPOSITIONS OF ASSETS (Details) $ in Millions	1 Months Ended	3 Months Ended
	Feb. 28, 2021 USD ($) business	Mar. 31, 2021 USD ($) station	Mar. 31, 2020 USD ($)
Business Acquisition [Line Items]
Number of businesses sold | business	2
Gain on sale of assets		$ 14	$ 32
Number of stations assigned new channels | station		100
Broadcast incentive auction, total legislation funds to reimburse stations		$ 3,000
Broadcast incentive auction, gain recognized on sale		14	24
Broadcast incentive auction, total capital expenditure		$ 4	$ 21
Zyp Media
Business Acquisition [Line Items]
Payment in cash	$ 7
WDKA and KBSI Assets | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business Acquisition [Line Items]
Aggregate purchase price	28
Gain on sale of assets	$ 12