NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Supplemental Information - Statements of Cash Flows (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2024	Jul. 31, 2025
Lessee, Lease, Description [Line Items]
Leased assets obtained in exchange for new operating lease liabilities			$ 7	$ 4
Leased assets obtained in exchange for new finance lease liabilities				17
Property and equipment purchases			4	5
Shares received in exchange for advertising spots			21	4
WLNE
Lessee, Lease, Description [Line Items]
Asset purchase agreement consideration	$ 32	$ 32	32
Disposed of by sale | Station Disposals
Lessee, Lease, Description [Line Items]
Consideration	36	36	36		$ 36
Sinclair Broadcast Group, LLC
Lessee, Lease, Description [Line Items]
Leased assets obtained in exchange for new operating lease liabilities			5	3
Leased assets obtained in exchange for new finance lease liabilities				17
Property and equipment purchases			4	5
Shares received in exchange for advertising spots			20	4
(Distributions to) contributions from member, net			97
Proceeds from contributions from member				48
Sinclair Broadcast Group, LLC | WLNE
Lessee, Lease, Description [Line Items]
Asset purchase agreement consideration	32	32	32
Sinclair Broadcast Group, LLC | Disposed of by sale | Station Disposals
Lessee, Lease, Description [Line Items]
Consideration	$ 36	$ 36	36		$ 36
Sinclair Broadcast Group, LLC | Dividends To Shareholders And Parent Company Expenses
Lessee, Lease, Description [Line Items]
(Distributions to) contributions from member, net			108	78
Sinclair Broadcast Group, LLC | Funding Of Cash Tax Payments
Lessee, Lease, Description [Line Items]
Proceeds from contributions from member			$ 11
Sinclair Broadcast Group, LLC | Funding Of DSG Litigation
Lessee, Lease, Description [Line Items]
Proceeds from contributions from member				$ 148