NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition, Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Total revenues	$ 1,125	$ 766	$ 2,618	$ 2,162
Local News
Disaggregation of Revenue [Line Items]
Total revenues	651	679	1,930	1,917
Sports
Disaggregation of Revenue [Line Items]
Total revenues	352	0	352	0
Other
Disaggregation of Revenue [Line Items]
Total revenues	122	87	336	245
Distribution revenue
Disaggregation of Revenue [Line Items]
Total revenues	679	331	1,398	965
Distribution revenue | Local News
Disaggregation of Revenue [Line Items]
Total revenues	340	303	995	882
Distribution revenue | Sports
Disaggregation of Revenue [Line Items]
Total revenues	306	0	306	0
Distribution revenue | Other
Disaggregation of Revenue [Line Items]
Total revenues	33	28	97	83
Advertising revenue
Disaggregation of Revenue [Line Items]
Total revenues	376	385	1,024	1,061
Advertising revenue | Local News
Disaggregation of Revenue [Line Items]
Total revenues	301	366	904	1,003
Advertising revenue | Sports
Disaggregation of Revenue [Line Items]
Total revenues	43	0	43	0
Advertising revenue | Other
Disaggregation of Revenue [Line Items]
Total revenues	32	19	77	58
Other media and non-media revenues
Disaggregation of Revenue [Line Items]
Total revenues	70	50	196	136
Other media and non-media revenues | Local News
Disaggregation of Revenue [Line Items]
Total revenues	10	10	31	32
Other media and non-media revenues | Sports
Disaggregation of Revenue [Line Items]
Total revenues	3	0	3	0
Other media and non-media revenues | Other
Disaggregation of Revenue [Line Items]
Total revenues	$ 57	$ 40	$ 162	$ 104