FAIR VALUE MEASUREMENTS - Schedule of Carrying Value and Fair Value of Notes and Debentures (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Feb. 07, 2023	Dec. 31, 2022
FAIR VALUE MEASUREMENTS:
Investments in equity securities	$ 186,000,000		$ 186,000,000			$ 234,000,000
Debt discount and deferred financing costs	$ 51,000,000		$ 51,000,000			56,000,000
Interest Rate Swap
FAIR VALUE MEASUREMENTS:
Notional amount					$ 600,000,000
Fixed interest rate					3.90%
Senior Notes | 5.500% Senior Notes due 2030
FAIR VALUE MEASUREMENTS:
Interest rate (as a percent)	5.50%		5.50%
Senior Notes | 5.125% Senior Notes due 2027
FAIR VALUE MEASUREMENTS:
Interest rate (as a percent)	5.125%		5.125%
Senior Notes | 4.125% Senior Secured Notes due 2030
FAIR VALUE MEASUREMENTS:
Interest rate (as a percent)	4.125%		4.125%
Bally's
FAIR VALUE MEASUREMENTS:
Option purchase price, minimum (in dollars per share)			$ 30
Option purchase price, maximum (in dollars per share)			$ 45
Bally's | Options and Warrants
FAIR VALUE MEASUREMENTS:
Measurement adjustments	$ (17,000,000)	$ (74,000,000)	$ (17,000,000)	$ (130,000,000)
Level 1 | Face Value
FAIR VALUE MEASUREMENTS:
Deferred compensation assets	43,000,000		43,000,000			41,000,000
Deferred compensation liabilities	40,000,000		40,000,000			35,000,000
Level 1 | Fair Value
FAIR VALUE MEASUREMENTS:
Investments in equity securities	5,000,000		5,000,000			6,000,000
Deferred compensation assets	43,000,000		43,000,000			41,000,000
Deferred compensation liabilities	40,000,000		40,000,000			35,000,000
Level 1 | Fair Value | Money market funds
FAIR VALUE MEASUREMENTS:
Money market funds	523,000,000		523,000,000			741,000,000
Level 2 | Face Value | Debt of variable interest entities
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	7,000,000		7,000,000			8,000,000
Level 2 | Face Value | Debt of non-media subsidiaries
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	16,000,000		16,000,000			16,000,000
Level 2 | Face Value | Senior Notes | 5.500% Senior Notes due 2030
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	485,000,000		485,000,000			500,000,000
Level 2 | Face Value | Senior Notes | 5.125% Senior Notes due 2027
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	278,000,000		278,000,000			282,000,000
Level 2 | Face Value | Senior Notes | 4.125% Senior Secured Notes due 2030
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	737,000,000		737,000,000			750,000,000
Level 2 | Face Value | Term Loan | Term Loan B-2, due September 30, 2026
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	1,251,000,000		1,251,000,000			1,258,000,000
Level 2 | Face Value | Term Loan | Term Loan B-3, due April 1, 2028
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	725,000,000		725,000,000			729,000,000
Level 2 | Face Value | Term Loan | Term Loan B-4, due April 21, 2029
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	743,000,000		743,000,000			746,000,000
Level 2 | Fair Value
FAIR VALUE MEASUREMENTS:
Investments in equity securities	123,000,000		123,000,000			153,000,000
Level 2 | Fair Value | Debt of variable interest entities
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	7,000,000		7,000,000			8,000,000
Level 2 | Fair Value | Debt of non-media subsidiaries
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	16,000,000		16,000,000			16,000,000
Level 2 | Fair Value | Senior Notes | 5.500% Senior Notes due 2030
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	281,000,000		281,000,000			347,000,000
Level 2 | Fair Value | Senior Notes | 5.125% Senior Notes due 2027
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	237,000,000		237,000,000			230,000,000
Level 2 | Fair Value | Senior Notes | 4.125% Senior Secured Notes due 2030
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	487,000,000		487,000,000			560,000,000
Level 2 | Fair Value | Term Loan | Term Loan B-2, due September 30, 2026
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	1,110,000,000		1,110,000,000			1,198,000,000
Level 2 | Fair Value | Term Loan | Term Loan B-3, due April 1, 2028
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	584,000,000		584,000,000			692,000,000
Level 2 | Fair Value | Term Loan | Term Loan B-4, due April 21, 2029
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	559,000,000		559,000,000			709,000,000
Level 2 | Fair Value | Interest Rate Swap
FAIR VALUE MEASUREMENTS:
Interest rate swap	8,000,000		8,000,000			0
Level 3 | Face Value | Options and Warrants
FAIR VALUE MEASUREMENTS:
Measurement adjustments	(17,000,000)	(74,000,000)	(17,000,000)	(130,000,000)
Level 3 | Fair Value
FAIR VALUE MEASUREMENTS:
Investments in equity securities	58,000,000		58,000,000			75,000,000
Sinclair Broadcast Group, LLC
FAIR VALUE MEASUREMENTS:
Investments in equity securities						234,000,000
Debt discount and deferred financing costs	$ 51,000,000		$ 51,000,000			56,000,000
Sinclair Broadcast Group, LLC | Interest Rate Swap
FAIR VALUE MEASUREMENTS:
Notional amount					$ 600,000,000
Fixed interest rate					3.90%
Sinclair Broadcast Group, LLC | Senior Notes | 5.500% Senior Notes due 2030
FAIR VALUE MEASUREMENTS:
Interest rate (as a percent)	5.50%		5.50%
Sinclair Broadcast Group, LLC | Senior Notes | 5.125% Senior Notes due 2027
FAIR VALUE MEASUREMENTS:
Interest rate (as a percent)	5.125%		5.125%
Sinclair Broadcast Group, LLC | Senior Notes | 4.125% Senior Secured Notes due 2030
FAIR VALUE MEASUREMENTS:
Interest rate (as a percent)	4.125%		4.125%
Sinclair Broadcast Group, LLC | Bally's
FAIR VALUE MEASUREMENTS:
Option purchase price, minimum (in dollars per share)			$ 30
Option purchase price, maximum (in dollars per share)			$ 45
Sinclair Broadcast Group, LLC | Bally's | Options and Warrants
FAIR VALUE MEASUREMENTS:
Measurement adjustments	$ (25,000,000)	(74,000,000)	$ (25,000,000)	(130,000,000)
Sinclair Broadcast Group, LLC | Level 1 | Face Value
FAIR VALUE MEASUREMENTS:
Deferred compensation assets	43,000,000		43,000,000			41,000,000
Deferred compensation liabilities	40,000,000		40,000,000			35,000,000
Sinclair Broadcast Group, LLC | Level 1 | Fair Value
FAIR VALUE MEASUREMENTS:
Investments in equity securities	0		0			6,000,000
Deferred compensation assets	43,000,000		43,000,000			41,000,000
Deferred compensation liabilities	40,000,000		40,000,000			35,000,000
Sinclair Broadcast Group, LLC | Level 1 | Fair Value | Money market funds
FAIR VALUE MEASUREMENTS:
Money market funds	348,000,000		348,000,000			741,000,000
Sinclair Broadcast Group, LLC | Level 2 | Face Value | Debt of variable interest entities
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	7,000,000		7,000,000			8,000,000
Sinclair Broadcast Group, LLC | Level 2 | Face Value | Debt of non-media subsidiaries
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	0		0			16,000,000
Sinclair Broadcast Group, LLC | Level 2 | Face Value | Senior Notes | 5.500% Senior Notes due 2030
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	485,000,000		485,000,000			500,000,000
Sinclair Broadcast Group, LLC | Level 2 | Face Value | Senior Notes | 5.125% Senior Notes due 2027
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	278,000,000		278,000,000			282,000,000
Sinclair Broadcast Group, LLC | Level 2 | Face Value | Senior Notes | 4.125% Senior Secured Notes due 2030
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	737,000,000		737,000,000			750,000,000
Sinclair Broadcast Group, LLC | Level 2 | Face Value | Term Loan | Term Loan B-2, due September 30, 2026
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	1,251,000,000		1,251,000,000			1,258,000,000
Sinclair Broadcast Group, LLC | Level 2 | Face Value | Term Loan | Term Loan B-3, due April 1, 2028
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	725,000,000		725,000,000			729,000,000
Sinclair Broadcast Group, LLC | Level 2 | Face Value | Term Loan | Term Loan B-4, due April 21, 2029
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	743,000,000		743,000,000			746,000,000
Sinclair Broadcast Group, LLC | Level 2 | Fair Value
FAIR VALUE MEASUREMENTS:
Investments in equity securities	0		0			153,000,000
Sinclair Broadcast Group, LLC | Level 2 | Fair Value | Debt of variable interest entities
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	7,000,000		7,000,000			8,000,000
Sinclair Broadcast Group, LLC | Level 2 | Fair Value | Debt of non-media subsidiaries
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	0		0			16,000,000
Sinclair Broadcast Group, LLC | Level 2 | Fair Value | Senior Notes | 5.500% Senior Notes due 2030
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	281,000,000		281,000,000			347,000,000
Sinclair Broadcast Group, LLC | Level 2 | Fair Value | Senior Notes | 5.125% Senior Notes due 2027
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	237,000,000		237,000,000			230,000,000
Sinclair Broadcast Group, LLC | Level 2 | Fair Value | Senior Notes | 4.125% Senior Secured Notes due 2030
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	487,000,000		487,000,000			560,000,000
Sinclair Broadcast Group, LLC | Level 2 | Fair Value | Term Loan | Term Loan B-2, due September 30, 2026
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	1,110,000,000		1,110,000,000			1,198,000,000
Sinclair Broadcast Group, LLC | Level 2 | Fair Value | Term Loan | Term Loan B-3, due April 1, 2028
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	584,000,000		584,000,000			692,000,000
Sinclair Broadcast Group, LLC | Level 2 | Fair Value | Term Loan | Term Loan B-4, due April 21, 2029
FAIR VALUE MEASUREMENTS:
Debt fair value disclosure	559,000,000		559,000,000			709,000,000
Sinclair Broadcast Group, LLC | Level 2 | Fair Value | Interest Rate Swap
FAIR VALUE MEASUREMENTS:
Interest rate swap	8,000,000		8,000,000			0
Sinclair Broadcast Group, LLC | Level 3 | Face Value | Options and Warrants
FAIR VALUE MEASUREMENTS:
Measurement adjustments	(25,000,000)	$ (74,000,000)	(25,000,000)	$ (130,000,000)
Sinclair Broadcast Group, LLC | Level 3 | Fair Value
FAIR VALUE MEASUREMENTS:
Investments in equity securities	$ 0		$ 0			$ 75,000,000