NOTES PAYABLE, FINANCE LEASES, AND COMMERCIAL BANK FINANCING (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 29, 2024 USD ($)	Dec. 31, 2023 USD ($)	Feb. 07, 2023 USD ($)
Debt Instrument [Line Items]
Borrowings under revolving credit facility exceed total commitments (as a percent)			35.00%
Gain on extinguishment of debt	$ 0	$ 11,000,000	$ 1,000,000	$ 11,000,000
Consolidated VIEs
Debt Instrument [Line Items]
Consolidated total debt	2,000,000		2,000,000			$ 2,000,000
Interest Rate Swap
Debt Instrument [Line Items]
Notional amount							$ 600,000,000
Fixed interest rate							3.90%
Fair value of interest rate swap	7,000,000		7,000,000			1,000,000
Guarantee Obligations
Debt Instrument [Line Items]
Unconditional and irrevocably guaranteed debt	2,000,000		2,000,000			2,000,000
Provide guarantee of certain obligations	117,000,000		$ 117,000,000
Annual escalations (as a percent)			4.00%
Debt term (year)			5 years
Affiliated Entity
Debt Instrument [Line Items]
Finance lease liabilities, current	2,000,000		$ 2,000,000			2,000,000
Finance lease liabilities, non-current	11,000,000		11,000,000			5,000,000
Term Loan B-2, due September 30, 2026 | Term Loan
Debt Instrument [Line Items]
Debt instrument, repurchased face amount	$ 27,000,000		27,000,000
Repayment of term loan			25,000,000
Gain on extinguishment of debt			$ 1,000,000
STG Revolving Credit Facility
Debt Instrument [Line Items]
First lien leverage ratio	4.5		4.5
Borrowings outstanding	$ 0		$ 0
Revolving commitment	228,000,000		228,000,000		$ 650,000,000
Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Gain on extinguishment of debt	0	$ 11,000,000	1,000,000	$ 11,000,000
Sinclair Broadcast Group, LLC | Interest Rate Swap
Debt Instrument [Line Items]
Notional amount							$ 600,000,000
Fixed interest rate							3.90%
Fair value of interest rate swap	7,000,000		7,000,000			1,000,000
Sinclair Broadcast Group, LLC | Affiliated Entity
Debt Instrument [Line Items]
Finance lease liabilities, current	2,000,000		2,000,000			2,000,000
Finance lease liabilities, non-current	11,000,000		11,000,000			$ 5,000,000
Sinclair Broadcast Group, LLC | Term Loan B-2, due September 30, 2026 | Term Loan
Debt Instrument [Line Items]
Debt instrument, repurchased face amount	$ 27,000,000		27,000,000
Repayment of term loan			25,000,000
Gain on extinguishment of debt			$ 1,000,000
Sinclair Broadcast Group, LLC | STG Revolving Credit Facility
Debt Instrument [Line Items]
First lien leverage ratio	4.5		4.5
Revolving commitment	$ 228,000,000		$ 228,000,000		$ 650,000,000