NOTES PAYABLE, FINANCE LEASES, AND COMMERCIAL BANK FINANCING (Details) - USD ($)		3 Months Ended		6 Months Ended
	Feb. 12, 2025	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024	Feb. 07, 2023
Debt Instrument [Line Items]
Gain on extinguishment of debt		$ 4,000,000	$ 0	$ 6,000,000	$ 1,000,000
Interest Rate Swap
Debt Instrument [Line Items]
Notional amount							$ 600,000,000
Fixed interest rate							3.90%
Derivative asset		1,000,000		1,000,000		$ 1,000,000
Guarantee Obligations
Debt Instrument [Line Items]
Unconditional and irrevocably guaranteed debt		2,000,000		2,000,000		2,000,000
Guarantee obligations, maximum amount		455,000,000		455,000,000
Guarantee obligations accrued payment		37,000,000		37,000,000
Guarantee Obligations | Accounts Payable and Accrued Liabilities
Debt Instrument [Line Items]
Guarantee obligations		24,000,000		24,000,000
Guarantee Obligations | Other Long-Term Liabilities
Debt Instrument [Line Items]
Guarantee obligations		13,000,000		13,000,000
Consolidated VIEs
Debt Instrument [Line Items]
Consolidated total debt		2,000,000		2,000,000		2,000,000
Affiliated Entity
Debt Instrument [Line Items]
Finance lease liabilities, current		3,000,000		3,000,000		3,000,000
Finance lease liabilities, non-current		8,000,000		8,000,000		9,000,000
Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Gain on extinguishment of debt		4,000,000	0	6,000,000	1,000,000
Sinclair Broadcast Group, LLC | Interest Rate Swap
Debt Instrument [Line Items]
Notional amount							$ 600,000,000
Fixed interest rate							3.90%
Derivative asset		1,000,000		1,000,000		1,000,000
Sinclair Broadcast Group, LLC | Guarantee Obligations
Debt Instrument [Line Items]
Unconditional and irrevocably guaranteed debt		2,000,000		2,000,000		2,000,000
Guarantee obligations, maximum amount		455,000,000		455,000,000
Guarantee obligations accrued payment		37,000,000		37,000,000
Sinclair Broadcast Group, LLC | Guarantee Obligations | Accounts Payable and Accrued Liabilities
Debt Instrument [Line Items]
Guarantee obligations		24,000,000		24,000,000
Sinclair Broadcast Group, LLC | Guarantee Obligations | Other Long-Term Liabilities
Debt Instrument [Line Items]
Guarantee obligations		13,000,000		13,000,000
Sinclair Broadcast Group, LLC | Consolidated VIEs
Debt Instrument [Line Items]
Consolidated total debt		2,000,000		2,000,000		2,000,000
Sinclair Broadcast Group, LLC | Affiliated Entity
Debt Instrument [Line Items]
Finance lease liabilities, current		3,000,000		3,000,000		3,000,000
Finance lease liabilities, non-current		$ 8,000,000		$ 8,000,000		$ 9,000,000
Line of Credit | First-Out Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 575,000,000
Line of Credit | First-Out Revolving Credit Facility | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Maximum borrowing capacity	575,000,000
Term Loan B-3 | Term Loan
Debt Instrument [Line Items]
Debt instrument, outstanding	711,400,000
Debt instrument, face amount	$ 714,000,000
Debt instrument, basis spread on variable rate	3.00%
Term Loan B-3 | Term Loan | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Debt instrument, outstanding	$ 711,400,000
Debt instrument, face amount	$ 714,000,000
Debt instrument, basis spread on variable rate	3.00%
Term Loan B-6, due December 31, 2029 | Term Loan
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	3.30%
Term Loan B-6, due December 31, 2029 | Term Loan | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	3.30%
Term Loan B-4 | Term Loan
Debt Instrument [Line Items]
Debt instrument, face amount	$ 731,300,000
Debt instrument, basis spread on variable rate	3.75%
Term Loan B-4 | Term Loan | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Debt instrument, face amount	$ 731,300,000
Debt instrument, basis spread on variable rate	3.75%
Term Loan B-7, due December 31, 2030 | Term Loan
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	4.10%
Term Loan B-7, due December 31, 2030 | Term Loan | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	4.10%
First-Out Revolving Credit Facility | Line of Credit | First-Out Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.00%
Maximum borrowing capacity	$ 575,000,000
First lien leverage ratio		3.5		3.5
Borrowings under revolving credit facility exceed total commitments (as a percent)				35.00%
Borrowings outstanding		$ 0		$ 0
First-Out Revolving Credit Facility | Line of Credit | First-Out Revolving Credit Facility | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.00%
Maximum borrowing capacity	$ 575,000,000
First lien leverage ratio		3.5		3.5
Borrowings under revolving credit facility exceed total commitments (as a percent)				35.00%
Borrowings outstanding		$ 0		$ 0
Third Lien Obligations | Term Loan
Debt Instrument [Line Items]
Debt instrument, face amount	3,000,000
Third Lien Obligations | Term Loan | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Debt instrument, face amount	3,000,000
Third Lien Obligations | Line of Credit | First-Out Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	75,000,000
Third Lien Obligations | Line of Credit | First-Out Revolving Credit Facility | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 75,000,000
STG Senior Unsecured Notes 8.125 Percent Due 2027 | Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amount		$ 1,430,000,000		$ 1,430,000,000
Interest rate (as a percent)		8.125%		8.125%
STG Senior Unsecured Notes 8.125 Percent Due 2027 | Senior Notes | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Debt instrument, face amount		$ 1,430,000,000		$ 1,430,000,000
Interest rate (as a percent)		8.125%		8.125%
STG Senior Unsecured Notes 8.125 Percent Due 2027 | Senior Notes | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Redemption price, percentage				100.00%
STG Senior Unsecured Notes 8.125 Percent Due 2027 | Senior Notes | Debt Instrument, Redemption, Period One | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Redemption price, percentage				100.00%
STG Senior Unsecured Notes 8.125 Percent Due 2027 | Senior Notes | Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Percentage of principal amount redeemed				40.00%
Redemption price, percentage				108.125%
STG Senior Unsecured Notes 8.125 Percent Due 2027 | Senior Notes | Debt Instrument, Redemption, Period Two | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Percentage of principal amount redeemed				40.00%
Redemption price, percentage				108.125%
STG Senior Unsecured Notes 8.125 Percent Due 2027 | Senior Notes | Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Redemption price, percentage				108.125%
STG Senior Unsecured Notes 8.125 Percent Due 2027 | Senior Notes | Debt Instrument, Redemption, Period Three | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Redemption price, percentage				108.125%
Term Loan B-2 | Term Loan
Debt Instrument [Line Items]
Repayment of term loan				$ 1,175,000,000
Gain on extinguishment of debt				(6,000,000)
Term Loan B-2 | Term Loan | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Repayment of term loan				1,175,000,000
Gain on extinguishment of debt				(6,000,000)
4.125% Senior Secured Notes due 2030 | Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amount		$ 63,600,000		$ 63,600,000
Interest rate (as a percent)		4.125%		4.125%
Percentage of principal amount redeemed				84.00%
Gain on extinguishment of debt				$ 5,000,000
4.125% Senior Secured Notes due 2030 | Senior Notes | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Debt instrument, face amount		$ 63,600,000		$ 63,600,000
Interest rate (as a percent)		4.125%		4.125%
Percentage of principal amount redeemed				84.00%
Gain on extinguishment of debt				$ 5,000,000
4.125% Senior Secured Notes due 2030 | Senior Notes | Debt Covenant Period One
Debt Instrument [Line Items]
Debt instrument, face amount		$ 432,000,000		432,000,000
4.125% Senior Secured Notes due 2030 | Senior Notes | Debt Covenant Period One | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Debt instrument, face amount		432,000,000		432,000,000
4.125% Senior Secured Notes due 2030 | Senior Notes | Debt Covenant Period Two
Debt Instrument [Line Items]
Debt instrument, face amount		238,000,000		238,000,000
4.125% Senior Secured Notes due 2030 | Senior Notes | Debt Covenant Period Two | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Debt instrument, face amount		238,000,000		238,000,000
STG 5.125% Senior Notes | Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amount		$ 104,000,000		$ 104,000,000
Interest rate (as a percent)		5.125%		5.125%
Percentage of principal amount redeemed				97.00%
Gain on extinguishment of debt				$ 3,000,000
Debt instrument, repurchased face amount		$ 81,000,000		81,000,000
Repayments of debt		77,000,000
STG 5.125% Senior Notes | Senior Notes | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Debt instrument, face amount		$ 104,000,000		$ 104,000,000
Interest rate (as a percent)		5.125%		5.125%
Percentage of principal amount redeemed				97.00%
Gain on extinguishment of debt				$ 3,000,000
Debt instrument, repurchased face amount		$ 81,000,000		81,000,000
Repayments of debt		77,000,000
STG 5.125% Senior Notes | Senior Notes | Debt Instrument, Redemption, Period Four
Debt Instrument [Line Items]
Gain on extinguishment of debt		4,000,000		4,000,000
STG 5.125% Senior Notes | Senior Notes | Debt Instrument, Redemption, Period Four | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Gain on extinguishment of debt		$ 4,000,000		$ 4,000,000
STG Second Lien Secured Notes 9.750 Percent Due 2033 | Senior Notes
Debt Instrument [Line Items]
Interest rate (as a percent)		9.75%		9.75%
STG Second Lien Secured Notes 9.750 Percent Due 2033 | Senior Notes | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Interest rate (as a percent)		9.75%		9.75%
STG Second Lien Secured Notes 9.750 Percent Due 2033 | Senior Notes | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Redemption price, percentage				100.00%
STG Second Lien Secured Notes 9.750 Percent Due 2033 | Senior Notes | Debt Instrument, Redemption, Period One | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Redemption price, percentage				100.00%
STG Second Lien Secured Notes 9.750 Percent Due 2033 | Senior Notes | Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Percentage of principal amount redeemed				40.00%
Redemption price, percentage				109.75%
STG Second Lien Secured Notes 9.750 Percent Due 2033 | Senior Notes | Debt Instrument, Redemption, Period Two | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Percentage of principal amount redeemed				40.00%
Redemption price, percentage				109.75%
STG Second Lien Secured Notes 9.750 Percent Due 2033 | Senior Notes | Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Redemption price, percentage				109.75%
STG Second Lien Secured Notes 9.750 Percent Due 2033 | Senior Notes | Debt Instrument, Redemption, Period Three | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Redemption price, percentage				109.75%
STG Second-Out First Lien Secured Notes 4.375 Percent due 2032 | Senior Notes
Debt Instrument [Line Items]
Interest rate (as a percent)		4.375%		4.375%
STG Second-Out First Lien Secured Notes 4.375 Percent due 2032 | Senior Notes | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Interest rate (as a percent)		4.375%		4.375%
STG Second-Out First Lien Secured Notes 4.375 Percent due 2032 | Senior Notes | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Redemption price, percentage				100.00%
STG Second-Out First Lien Secured Notes 4.375 Percent due 2032 | Senior Notes | Debt Instrument, Redemption, Period One | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Redemption price, percentage				100.00%
4.125% Unsecured Notes due 2030 | Senior Notes | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Debt instrument, face amount		$ 4,000,000		$ 4,000,000
Interest rate (as a percent)		4.125%		4.125%
Term Loan B-2, due September 30, 2026 | Term Loan
Debt Instrument [Line Items]
Repayment of term loan					25,000,000
Gain on extinguishment of debt					1,000,000
Debt instrument, repurchased face amount			27,000,000		27,000,000
Term Loan B-2, due September 30, 2026 | Term Loan | Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Repayment of term loan					25,000,000
Gain on extinguishment of debt					1,000,000
Debt instrument, repurchased face amount			$ 27,000,000		$ 27,000,000