NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition, Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Total revenues	$ 1,283	$ 771	$ 2,892	$ 1,493
Distribution revenue
Disaggregation of Revenue [Line Items]
Total revenues	1,010	367	2,165	719
Advertising revenue
Disaggregation of Revenue [Line Items]
Total revenues	235	339	635	647
Other media, non-media, and intercompany revenues
Disaggregation of Revenue [Line Items]
Total revenues	38	65	92	127
Operating segments | Broadcast
Disaggregation of Revenue [Line Items]
Total revenues	592	660	1,292	1,278
Operating segments | Local sports
Disaggregation of Revenue [Line Items]
Total revenues	616	0	1,428	0
Operating segments | Other
Disaggregation of Revenue [Line Items]
Total revenues	104	117	233	225
Operating segments | Distribution revenue | Broadcast
Disaggregation of Revenue [Line Items]
Total revenues	349	335	703	655
Operating segments | Distribution revenue | Local sports
Disaggregation of Revenue [Line Items]
Total revenues	610	0	1,362	0
Operating segments | Distribution revenue | Other
Disaggregation of Revenue [Line Items]
Total revenues	51	32	100	65
Operating segments | Advertising revenue | Broadcast
Disaggregation of Revenue [Line Items]
Total revenues	208	315	517	602
Operating segments | Advertising revenue | Local sports
Disaggregation of Revenue [Line Items]
Total revenues	3	0	58	0
Operating segments | Advertising revenue | Other
Disaggregation of Revenue [Line Items]
Total revenues	25	24	61	45
Operating segments | Other media, non-media, and intercompany revenues | Broadcast
Disaggregation of Revenue [Line Items]
Total revenues	35	10	72	21
Operating segments | Other media, non-media, and intercompany revenues | Local sports
Disaggregation of Revenue [Line Items]
Total revenues	3	0	8	0
Operating segments | Other media, non-media, and intercompany revenues | Other
Disaggregation of Revenue [Line Items]
Total revenues	28	61	72	115
Eliminations
Disaggregation of Revenue [Line Items]
Total revenues	(29)	(6)	(61)	(10)
Eliminations | Distribution revenue
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	(1)
Eliminations | Advertising revenue
Disaggregation of Revenue [Line Items]
Total revenues	(1)	0	(1)	0
Eliminations | Other media, non-media, and intercompany revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ (28)	$ (6)	$ (60)	$ (9)