NOTES PAYABLE AND COMMERCIAL BANK FINANCING - Schedule of Notes Payable, Capital Leases and Commercial Bank Financing (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Outstanding debt amount	$ 4,194.0
Finance lease, liability	27.0	$ 32.0
Total outstanding principal	4,221.0	4,321.0
Less: Deferred financing costs and discounts	(46.0)	(56.0)
Less: Current portion	(34.0)	(35.0)
Less: Finance leases - affiliate, current portion	(6.0)	(6.0)
Long-term debt	4,139.0	4,227.0
Debt of variable interest entities
Debt Instrument [Line Items]
Outstanding debt amount	7.0	8.0
Debt of non-media subsidiaries
Debt Instrument [Line Items]
Outstanding debt amount	15.0	16.0
Finance leases
Debt Instrument [Line Items]
Finance lease, liability	20.0	23.0
Finance leases - affiliate
Debt Instrument [Line Items]
Finance lease, liability	7.0	9.0
Less: Finance leases - affiliate, current portion	(2.0)	(3.0)
Term Loan \| Term Loan B-2
Debt Instrument [Line Items]
Outstanding debt amount	1,215.0	1,258.0
Redeemed aggregate principal amount	30.0
Repayments of secured debt	26.0
Term Loan \| Term Loan B-3
Debt Instrument [Line Items]
Outstanding debt amount	722.0	729.0
Term Loan \| Term Loan B-4
Debt Instrument [Line Items]
Outstanding debt amount	739.0	746.0
Notes \| 5.125% Unsecured Notes, due February 15, 2027
Debt Instrument [Line Items]
Outstanding debt amount	$ 274.0	282.0
Interest rate (as a percent)	5.125%
Redeemed aggregate principal amount	$ 7.0	118.0
Repayments of senior debt	6.0	104.0
Notes \| 5.500% Unsecured Notes, due March 1, 2030
Debt Instrument [Line Items]
Outstanding debt amount	$ 485.0	500.0
Interest rate (as a percent)	5.50%
Redeemed aggregate principal amount	$ 15.0
Repayments of senior debt	8.0
Notes \| 4.125% Senior Secured Notes, due December 1, 2030
Debt Instrument [Line Items]
Outstanding debt amount	$ 737.0	750.0
Interest rate (as a percent)	4.125%
Redeemed aggregate principal amount	$ 13.0
Repayments of senior debt	8.0
Sinclair Broadcast Group, LLC
Debt Instrument [Line Items]
Outstanding debt amount	4,179.0
Finance lease, liability	27.0	32.0
Total outstanding principal	4,206.0	4,321.0
Less: Deferred financing costs and discounts	(46.0)	(56.0)
Less: Current portion	(34.0)	(35.0)
Less: Finance leases - affiliate, current portion	(6.0)	(6.0)
Long-term debt	4,124.0	4,227.0
Sinclair Broadcast Group, LLC \| Debt of variable interest entities
Debt Instrument [Line Items]
Outstanding debt amount	7.0	8.0
Sinclair Broadcast Group, LLC \| Debt of non-media subsidiaries
Debt Instrument [Line Items]
Outstanding debt amount	0.0	16.0
Sinclair Broadcast Group, LLC \| Finance leases
Debt Instrument [Line Items]
Finance lease, liability	20.0	23.0
Sinclair Broadcast Group, LLC \| Finance leases - affiliate
Debt Instrument [Line Items]
Finance lease, liability	7.0	9.0
Less: Finance leases - affiliate, current portion	(2.0)	(3.0)
Sinclair Broadcast Group, LLC \| Term Loan \| Term Loan B-2
Debt Instrument [Line Items]
Outstanding debt amount	1,215.0	1,258.0
Redeemed aggregate principal amount	30.0
Repayments of secured debt	26.0
Sinclair Broadcast Group, LLC \| Term Loan \| Term Loan B-3
Debt Instrument [Line Items]
Outstanding debt amount	722.0	729.0
Sinclair Broadcast Group, LLC \| Term Loan \| Term Loan B-4
Debt Instrument [Line Items]
Outstanding debt amount	739.0	746.0
Sinclair Broadcast Group, LLC \| Notes \| 5.125% Unsecured Notes, due February 15, 2027
Debt Instrument [Line Items]
Outstanding debt amount	$ 274.0	282.0
Interest rate (as a percent)	5.125%
Redeemed aggregate principal amount	$ 7.0	118.0
Repayments of senior debt	6.0	104.0
Sinclair Broadcast Group, LLC \| Notes \| 5.500% Unsecured Notes, due March 1, 2030
Debt Instrument [Line Items]
Outstanding debt amount	$ 485.0	500.0
Interest rate (as a percent)	5.50%
Redeemed aggregate principal amount	$ 15.0
Repayments of senior debt	8.0
Sinclair Broadcast Group, LLC \| Notes \| 4.125% Senior Secured Notes, due December 1, 2030
Debt Instrument [Line Items]
Outstanding debt amount	$ 737.0	$ 750.0
Interest rate (as a percent)	4.125%
Redeemed aggregate principal amount	$ 13.0
Repayments of senior debt	$ 8.0

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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