ACQUISITIONS AND DISPOSITIONS OF ASSETS (Details) $ in Millions	1 Months Ended		3 Months Ended		6 Months Ended
	Feb. 28, 2017 USD ($)	Mar. 31, 2016 station	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Business Combination and Asset Acquisition [Abstract]
Number of stations assigned new channels | station		100
Broadcast incentive auction, total legislation funds to reimburse stations	$ 3,000.0
Broadcast incentive auction, gain recognized on sale			$ 1.0	$ 4.0	$ 2.0	$ 18.0
Broadcast incentive auction, total capital expenditure			$ 0.1	$ 4.0	$ 1.0	$ 9.0