NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition, Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Total revenues	$ 773	$ 1,288
Distribution revenue
Disaggregation of Revenue [Line Items]
Total revenues	426	873
Advertising revenue
Disaggregation of Revenue [Line Items]
Total revenues	309	371
Other media, non-media, and intercompany revenues
Disaggregation of Revenue [Line Items]
Total revenues	38	44
Operating Segments \| Broadcast
Disaggregation of Revenue [Line Items]
Total revenues	676	721
Operating Segments \| Local sports
Disaggregation of Revenue [Line Items]
Total revenues		482
Operating Segments \| Other
Disaggregation of Revenue [Line Items]
Total revenues	104	134
Operating Segments \| Distribution revenue \| Broadcast
Disaggregation of Revenue [Line Items]
Total revenues	380	392
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	46	48
Operating Segments \| Advertising revenue \| Broadcast
Disaggregation of Revenue [Line Items]
Total revenues	268	282
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	46	68
Operating Segments \| Other media, non-media, and intercompany revenues \| Broadcast
Disaggregation of Revenue [Line Items]
Total revenues	28	47
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	12	18
Eliminations
Disaggregation of Revenue [Line Items]
Total revenues	(7)	(49)
Eliminations \| Distribution revenue
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Eliminations \| Advertising revenue
Disaggregation of Revenue [Line Items]
Total revenues	(5)	(23)
Eliminations \| Other media, non-media, and intercompany revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ (2)	$ (26)

SINCLAIR BROADCAST GROUP INC 10-Q