CONDENSED CONSOLIDATING FINANCIAL STATEMENTS - Statement of Operations and Comprehensive Income (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Mar. 01, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
Total revenues		$ 768	$ 837	$ 1,541	$ 2,125
Media programming and production expenses		413	403	811	1,161
Gain on deconsolidation of subsidiary	$ (3,357)	0	0	0	(3,357)
Total operating expenses (gains)		771	730	1,523	(1,448)
Operating (loss) income		(3)	107	18	3,573
Interest expense		(76)	(54)	(150)	(169)
Total other (expense) income		(104)	(153)	(136)	(316)
Income tax (provision) benefit		20	40	224	(647)
Net income (loss)		(87)	(6)	106	2,610
Net income attributable to the redeemable noncontrolling interests		0	(5)	4	(9)
Net income attributable to the noncontrolling interests		(2)	0	(14)	(25)
Net (loss) income attributable to Sinclair Broadcast Group		(89)	(11)	96	2,576
Comprehensive (loss) income		(78)	(6)	112	2,613
Sinclair Broadcast Group, LLC
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
Total revenues		743	837	1,516	2,125
Media programming and production expenses		397	403	795	1,161
Selling, general and administrative expenses		242	233	491	500
Gain on deconsolidation of subsidiary	$ (3,357)	0	0	0	(3,357)
Depreciation, amortization and other operating expenses		100	94	205	248
Total operating expenses (gains)		739	730	1,491	(1,448)
Operating (loss) income		4	107	25	3,573
Equity in (loss) earnings of consolidated subsidiaries		0	0	0	0
Interest expense		(76)	(54)	(150)	(169)
Other (expense) income		(53)	(99)	(11)	(147)
Total other (expense) income		(129)	(153)	(161)	(316)
Income tax (provision) benefit		26	40	230	(647)
Net income (loss)		(99)	(6)	94	2,610
Net income attributable to the redeemable noncontrolling interests		0	(5)	4	(9)
Net income attributable to the noncontrolling interests		(2)	0	(14)	(25)
Net (loss) income attributable to Sinclair Broadcast Group		(101)	(11)	84	2,576
Comprehensive (loss) income		(90)	(6)	100	2,613
Sinclair Broadcast Group, LLC | Reportable Legal Entities | Sinclair, Inc.
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
Total revenues		0	0	0	0
Media programming and production expenses		0	0	0	0
Selling, general and administrative expenses		13	3	38	6
Gain on deconsolidation of subsidiary					(3,357)
Depreciation, amortization and other operating expenses		1	1	2	1
Total operating expenses (gains)		14	4	40	(3,350)
Operating (loss) income		(14)	(4)	(40)	3,350
Equity in (loss) earnings of consolidated subsidiaries		(88)	(12)	119	(50)
Interest expense		0	0	0	(4)
Other (expense) income		(1)	6	(4)	10
Total other (expense) income		(89)	(6)	115	(44)
Income tax (provision) benefit		2	(1)	9	(730)
Net income (loss)		(101)	(11)	84	2,576
Net income attributable to the redeemable noncontrolling interests			0	0	0
Net income attributable to the noncontrolling interests		0		0	0
Net (loss) income attributable to Sinclair Broadcast Group		(101)	(11)	84	2,576
Comprehensive (loss) income		(101)	(11)	84	2,576
Sinclair Broadcast Group, LLC | Reportable Legal Entities | Sinclair Television Group, Inc.
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
Total revenues		15	11	25	40
Media programming and production expenses		4	2	7	2
Selling, general and administrative expenses		49	38	84	86
Gain on deconsolidation of subsidiary					0
Depreciation, amortization and other operating expenses		1	1	2	3
Total operating expenses (gains)		54	41	93	91
Operating (loss) income		(39)	(30)	(68)	(51)
Equity in (loss) earnings of consolidated subsidiaries		54	119	123	219
Interest expense		(75)	(53)	(148)	(97)
Other (expense) income		17	(2)	25	(1)
Total other (expense) income		(4)	64	0	121
Income tax (provision) benefit		19	10	38	30
Net income (loss)		(24)	44	(30)	100
Net income attributable to the redeemable noncontrolling interests			0	0	0
Net income attributable to the noncontrolling interests		0		0	0
Net (loss) income attributable to Sinclair Broadcast Group		(24)	44	(30)	100
Comprehensive (loss) income		(15)	44	(24)	100
Sinclair Broadcast Group, LLC | Reportable Legal Entities | Guarantor Subsidiaries and KDSM, LLC
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
Total revenues		713	820	1,452	1,611
Media programming and production expenses		377	383	753	745
Selling, general and administrative expenses		181	206	368	405
Gain on deconsolidation of subsidiary					0
Depreciation, amortization and other operating expenses		85	84	167	168
Total operating expenses (gains)		643	673	1,288	1,318
Operating (loss) income		70	147	164	293
Equity in (loss) earnings of consolidated subsidiaries		0	0	0	0
Interest expense		0	0	(1)	(1)
Other (expense) income		0	0	0	3
Total other (expense) income		0	0	(1)	2
Income tax (provision) benefit		(15)	(27)	(38)	(74)
Net income (loss)		55	120	125	221
Net income attributable to the redeemable noncontrolling interests			0	0	0
Net income attributable to the noncontrolling interests		0		0	0
Net (loss) income attributable to Sinclair Broadcast Group		55	120	125	221
Comprehensive (loss) income		55	120	125	221
Sinclair Broadcast Group, LLC | Reportable Legal Entities | Non- Guarantor Subsidiaries
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
Total revenues		33	46	76	577
Media programming and production expenses		27	36	61	448
Selling, general and administrative expenses		4	6	9	69
Gain on deconsolidation of subsidiary					0
Depreciation, amortization and other operating expenses		15	12	37	82
Total operating expenses (gains)		46	54	107	599
Operating (loss) income		(13)	(8)	(31)	(22)
Equity in (loss) earnings of consolidated subsidiaries		0	0	0	0
Interest expense		2	(4)	(1)	(79)
Other (expense) income		(69)	(103)	(32)	(153)
Total other (expense) income		(67)	(107)	(33)	(232)
Income tax (provision) benefit		20	58	221	127
Net income (loss)		(60)	(57)	157	(127)
Net income attributable to the redeemable noncontrolling interests			(5)	4	(9)
Net income attributable to the noncontrolling interests		(2)		(14)	(25)
Net (loss) income attributable to Sinclair Broadcast Group		(62)	(62)	147	(161)
Comprehensive (loss) income		(60)	(57)	157	(124)
Sinclair Broadcast Group, LLC | Eliminations
CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS AND COMPREHENSIVE INCOME
Total revenues		(18)	(40)	(37)	(103)
Media programming and production expenses		(11)	(18)	(26)	(34)
Selling, general and administrative expenses		(5)	(20)	(8)	(66)
Gain on deconsolidation of subsidiary					0
Depreciation, amortization and other operating expenses		(2)	(4)	(3)	(6)
Total operating expenses (gains)		(18)	(42)	(37)	(106)
Operating (loss) income		0	2	0	3
Equity in (loss) earnings of consolidated subsidiaries		34	(107)	(242)	(169)
Interest expense		(3)	3	0	12
Other (expense) income		0	0	0	(6)
Total other (expense) income		31	(104)	(242)	(163)
Income tax (provision) benefit		0	0	0	0
Net income (loss)		31	(102)	(242)	(160)
Net income attributable to the redeemable noncontrolling interests			0	0	0
Net income attributable to the noncontrolling interests		0		0	0
Net (loss) income attributable to Sinclair Broadcast Group		31	(102)	(242)	(160)
Comprehensive (loss) income		$ 31	$ (102)	$ (242)	$ (160)