NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition, Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenues	$ 1,609	$ 722
Distribution revenue
Disaggregation of Revenue [Line Items]
Total revenues	1,156	352
Advertising revenue
Disaggregation of Revenue [Line Items]
Total revenues	400	308
Other media, non-media, and intercompany revenues
Disaggregation of Revenue [Line Items]
Total revenues	53	62
Operating segments | Local News and Marketing Services
Disaggregation of Revenue [Line Items]
Total revenues	701	619
Operating segments | Sports
Disaggregation of Revenue [Line Items]
Total revenues	812	0
Operating segments | Other
Disaggregation of Revenue [Line Items]
Total revenues	128	107
Operating segments | Distribution revenue | Local News and Marketing Services
Disaggregation of Revenue [Line Items]
Total revenues	355	320
Operating segments | Distribution revenue | Sports
Disaggregation of Revenue [Line Items]
Total revenues	752	0
Operating segments | Distribution revenue | Other
Disaggregation of Revenue [Line Items]
Total revenues	49	32
Operating segments | Advertising revenue | Local News and Marketing Services
Disaggregation of Revenue [Line Items]
Total revenues	310	288
Operating segments | Advertising revenue | Sports
Disaggregation of Revenue [Line Items]
Total revenues	55	0
Operating segments | Advertising revenue | Other
Disaggregation of Revenue [Line Items]
Total revenues	35	20
Operating segments | Other media, non-media, and intercompany revenues | Local News and Marketing Services
Disaggregation of Revenue [Line Items]
Total revenues	36	11
Operating segments | Other media, non-media, and intercompany revenues | Sports
Disaggregation of Revenue [Line Items]
Total revenues	5	0
Operating segments | Other media, non-media, and intercompany revenues | Other
Disaggregation of Revenue [Line Items]
Total revenues	44	55
Eliminations
Disaggregation of Revenue [Line Items]
Total revenues	(32)	(4)
Eliminations | Distribution revenue
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Eliminations | Advertising revenue
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Eliminations | Other media, non-media, and intercompany revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ (32)	$ (4)