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, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenues	$ 768	$ 837	$ 1,541	$ 2,125
Distribution revenue
Disaggregation of Revenue [Line Items]
Total revenues	418	430	844	1,303
Advertising revenue
Disaggregation of Revenue [Line Items]
Total revenues	309	366	618	737
Other media, non-media, and intercompany revenues
Disaggregation of Revenue [Line Items]
Total revenues	41	41	79	85
Operating Segments | Local Media
Disaggregation of Revenue [Line Items]
Total revenues	699	760	1,404	1,514
Operating Segments | Local Sports
Disaggregation of Revenue [Line Items]
Total revenues				482
Operating Segments | Other
Disaggregation of Revenue [Line Items]
Total revenues	14	27	31	57
Operating Segments | Distribution revenue | Local Media
Disaggregation of Revenue [Line Items]
Total revenues	372	385	753	778
Operating Segments | Distribution revenue | Local Sports
Disaggregation of Revenue [Line Items]
Total revenues				433
Operating Segments | Distribution revenue | Other
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Operating Segments | Advertising revenue | Local Media
Disaggregation of Revenue [Line Items]
Total revenues	293	343	589	656
Operating Segments | Advertising revenue | Local Sports
Disaggregation of Revenue [Line Items]
Total revenues				44
Operating Segments | Advertising revenue | Other
Disaggregation of Revenue [Line Items]
Total revenues	6	13	12	27
Operating Segments | Other media, non-media, and intercompany revenues | Local Media
Disaggregation of Revenue [Line Items]
Total revenues	34	32	62	80
Operating Segments | Other media, non-media, and intercompany revenues | Local Sports
Disaggregation of Revenue [Line Items]
Total revenues				5
Operating Segments | Other media, non-media, and intercompany revenues | Other
Disaggregation of Revenue [Line Items]
Total revenues	8	14	19	30
Eliminations
Disaggregation of Revenue [Line Items]
Total revenues	(5)	(8)	(9)	(42)
Eliminations | Distribution revenue
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Eliminations | Advertising revenue
Disaggregation of Revenue [Line Items]
Total revenues	(4)	(1)	(6)	(9)
Eliminations | Other media, non-media, and intercompany revenues
Disaggregation of Revenue [Line Items]
Total revenues	(1)	(7)	(3)	(33)
Sinclair Broadcast Group, LLC
Disaggregation of Revenue [Line Items]
Total revenues	743	837	1,516	2,125
Sinclair Broadcast Group, LLC | Distribution revenue
Disaggregation of Revenue [Line Items]
Total revenues	403	430	829	1,303
Sinclair Broadcast Group, LLC | Advertising revenue
Disaggregation of Revenue [Line Items]
Total revenues	303	366	613	737
Sinclair Broadcast Group, LLC | Other media, non-media, and intercompany revenues
Disaggregation of Revenue [Line Items]
Total revenues	37	41	74	85
Sinclair Broadcast Group, LLC | Operating Segments | Local Media
Disaggregation of Revenue [Line Items]
Total revenues	699	760	1,404	1,514
Sinclair Broadcast Group, LLC | Operating Segments | Local Sports
Disaggregation of Revenue [Line Items]
Total revenues				482
Sinclair Broadcast Group, LLC | Operating Segments | Other
Disaggregation of Revenue [Line Items]
Total revenues	47	85	119	171
Sinclair Broadcast Group, LLC | Operating Segments | Distribution revenue | Local Media
Disaggregation of Revenue [Line Items]
Total revenues	372	385	753	778
Sinclair Broadcast Group, LLC | Operating Segments | Distribution revenue | Local Sports
Disaggregation of Revenue [Line Items]
Total revenues				433
Sinclair Broadcast Group, LLC | Operating Segments | Distribution revenue | Other
Disaggregation of Revenue [Line Items]
Total revenues	31	45	76	92
Sinclair Broadcast Group, LLC | Operating Segments | Advertising revenue | Local Media
Disaggregation of Revenue [Line Items]
Total revenues	293	343	589	656
Sinclair Broadcast Group, LLC | Operating Segments | Advertising revenue | Local Sports
Disaggregation of Revenue [Line Items]
Total revenues				44
Sinclair Broadcast Group, LLC | Operating Segments | Advertising revenue | Other
Disaggregation of Revenue [Line Items]
Total revenues	13	25	29	47
Sinclair Broadcast Group, LLC | Operating Segments | Other media, non-media, and intercompany revenues | Local Media
Disaggregation of Revenue [Line Items]
Total revenues	34	32	62	80
Sinclair Broadcast Group, LLC | Operating Segments | Other media, non-media, and intercompany revenues | Local Sports
Disaggregation of Revenue [Line Items]
Total revenues				5
Sinclair Broadcast Group, LLC | Operating Segments | Other media, non-media, and intercompany revenues | Other
Disaggregation of Revenue [Line Items]
Total revenues	3	15	14	32
Sinclair Broadcast Group, LLC | Eliminations
Disaggregation of Revenue [Line Items]
Total revenues	(3)	(8)	(7)	(42)
Sinclair Broadcast Group, LLC | Eliminations | Distribution revenue
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Sinclair Broadcast Group, LLC | Eliminations | Advertising revenue
Disaggregation of Revenue [Line Items]
Total revenues	(3)	(2)	(5)	(10)
Sinclair Broadcast Group, LLC | Eliminations | Other media, non-media, and intercompany revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 0	$ (6)	$ (2)	$ (32)