RELATED PERSON TRANSACTIONS - Employees (Details) - Related Party - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Employee | Jason Smith
Related Party Transaction [Line Items]
Total compensation (less than)	$ 0.3	$ 0.3	$ 0.9	$ 0.8
Employee | Ethan White
Related Party Transaction [Line Items]
Total compensation (less than)	0.1	0.1	0.2	0.2
Employee | Ryan McCoy
Related Party Transaction [Line Items]
Total compensation (less than)	0.1	0.1	0.1	0.1
Employee | Amberly Thompson
Related Party Transaction [Line Items]
Total compensation (less than)	0.1	0.1	$ 0.1	$ 0.1
Employee | Restricted Stock | Jason Smith
Related Party Transaction [Line Items]
Granted (in shares)			159,607	37,566
Vesting period			2 years	2 years
Employee | Restricted Stock | Ethan White
Related Party Transaction [Line Items]
Granted (in shares)			3,244	1,503
Vesting period			2 years	2 years
Employee | Restricted Stock | Amberly Thompson
Related Party Transaction [Line Items]
Granted (in shares)			285
Vesting period			2 years
Employee | Stock Appreciation Rights (SARs) | Jason Smith
Related Party Transaction [Line Items]
Granted (in shares)				500,000
Vesting period				2 years
Vice President | Frederick Smith
Related Party Transaction [Line Items]
Total compensation (less than)	0.1	0.2	$ 0.5	$ 0.6
Director | J. Duncan Smith
Related Party Transaction [Line Items]
Total compensation (less than)	0.1	0.2	0.5
Sinclair Broadcast Group, LLC | Employee | Jason Smith
Related Party Transaction [Line Items]
Total compensation (less than)	0.3	0.3	0.9	0.8
Sinclair Broadcast Group, LLC | Employee | Ethan White
Related Party Transaction [Line Items]
Total compensation (less than)	0.1	0.1	0.2	0.2
Sinclair Broadcast Group, LLC | Employee | Ryan McCoy
Related Party Transaction [Line Items]
Total compensation (less than)	0.1	0.1	0.1	0.1
Sinclair Broadcast Group, LLC | Employee | Amberly Thompson
Related Party Transaction [Line Items]
Total compensation (less than)	0.1	0.1	$ 0.1	$ 0.1
Sinclair Broadcast Group, LLC | Employee | Restricted Stock | Jason Smith
Related Party Transaction [Line Items]
Granted (in shares)			159,607	37,566
Vesting period			2 years	2 years
Sinclair Broadcast Group, LLC | Employee | Restricted Stock | Ethan White
Related Party Transaction [Line Items]
Granted (in shares)			3,244	1,503
Vesting period			2 years	2 years
Sinclair Broadcast Group, LLC | Employee | Restricted Stock | Amberly Thompson
Related Party Transaction [Line Items]
Granted (in shares)			285
Vesting period			2 years
Sinclair Broadcast Group, LLC | Employee | Stock Appreciation Rights (SARs) | Jason Smith
Related Party Transaction [Line Items]
Granted (in shares)				500,000
Sinclair Broadcast Group, LLC | Vice President | Frederick Smith
Related Party Transaction [Line Items]
Total compensation (less than)	0.1	0.2	$ 0.5	$ 0.6
Sinclair Broadcast Group, LLC | Director | J. Duncan Smith
Related Party Transaction [Line Items]
Total compensation (less than)	$ 0.1	$ 0.2	$ 0.5	$ 0.6