Guarantor Obligation, Amount Sought

No definition available.

Name:	sbgi_GuarantorObligationAmountSought
Namespace Prefix:	sbgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Litigation Settlement, Compliance Plan Term

+ References

No definition available.

+ Details

Name:	sbgi_LitigationSettlementCompliancePlanTerm
Namespace Prefix:	sbgi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Litigation Settlement, Number of Petitions Filed

+ References

No definition available.

+ Details

Name:	sbgi_LitigationSettlementNumberofPetitionsFiled
Namespace Prefix:	sbgi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Loss Contingency, Allegations, Payments Received

+ References

No definition available.

+ Details

Name:	sbgi_LossContingencyAllegationsPaymentsReceived
Namespace Prefix:	sbgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Loss Contingency, Damages Sought, Total

+ References

No definition available.

+ Details

Name:	sbgi_LossContingencyDamagesSoughtTotal
Namespace Prefix:	sbgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Loss Contingency, Damages Sought, Value Per Station

+ References

No definition available.

+ Details

Name:	sbgi_LossContingencyDamagesSoughtValuePerStation
Namespace Prefix:	sbgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Loss Contingency, Issuance of Forfeiture Penalty Upheld

+ References

No definition available.

+ Details

Name:	sbgi_LossContingencyIssuanceOfForfeiturePenaltyUpheld
Namespace Prefix:	sbgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Loss Contingency, Number of Other Broadcasters

+ References

No definition available.

+ Details

Name:	sbgi_LossContingencyNumberOfOtherBroadcasters
Namespace Prefix:	sbgi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Loss Contingency, Settlement, Withdrawal Of Litigation

+ References

No definition available.

+ Details

Name:	sbgi_LossContingencySettlementWithdrawalOfLitigation
Namespace Prefix:	sbgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the number of television stations owned by the entity.

+ References

No definition available.

+ Details

Name:	sbgi_NumberOfTelevisionStationsOwned
Namespace Prefix:	sbgi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount awarded to other party in judgment or settlement of litigation.

+ References

No definition available.

+ Details

Name:	us-gaap_LitigationSettlementAmountAwardedToOtherParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-4

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-9

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 720
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483359/720-20-50-1

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 27
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482395/460-10-55-27

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-9

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-4

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-3

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

+ Details

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-10

+ Details

Name:	us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of increase (decrease) in loss contingency liability.

+ References

+ Details

Name:	us-gaap_LossContingencyAccrualCarryingValuePeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of damages awarded to the plaintiff in the legal matter.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-4

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-9

+ Details

Name:	us-gaap_LossContingencyDamagesAwardedValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

+ Details

Name:	us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

+ Details

Name:	us-gaap_LossContingencyNewClaimsFiledNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of cash paid for the settlement of litigation or for other legal issues during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 25
-Subparagraph (g)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-25

+ Details

Name:	us-gaap_PaymentsForLegalSettlements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	srt_CounterpartyNameAxis=sbgi_MarqueeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_UnfavorableRegulatoryActionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=sbgi_AllegedInappropriateTransactionsBetweenSinclairBroadcastGroupAndDiamondSportsGroupMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=sbgi_SinclairTelevisionGroupInc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=sbgi_SinclairVenturesLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=sbgi_BreachOfMergerAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_LitigationCaseAxis=sbgi_VariousCasesAllegingViolationOfShermanAntitrustActMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=sbgi_SinclairBroadcastGroupLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

COMMITMENTS AND CONTINGENCIES - Narrative (Details) $ in Thousands												1 Months Ended	3 Months Ended		12 Months Ended
	Mar. 01, 2024 USD ($)	Dec. 08, 2023 USD ($)	Jul. 19, 2023 USD ($)	Sep. 21, 2022 USD ($) station	Jul. 28, 2021 USD ($)	Oct. 15, 2020 USD ($)	Sep. 02, 2020 USD ($)	Aug. 19, 2020 USD ($)	Jun. 08, 2020 petition	May 22, 2020 USD ($)	Nov. 06, 2018 lawsuit	Dec. 31, 2017 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2021 USD ($)	Mar. 31, 2025 USD ($) station	Jul. 19, 2024 USD ($)	Oct. 03, 2018 broadcaster
Loss Contingencies [Line Items]
Number of television stations owned \| station																185
Marquee
Loss Contingencies [Line Items]
Guarantee, amount sought																	$ 29,000
Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Proposed fine				$ 2,700			$ 9,000					$ 13,000
Proposed fine per station						$ 25	500
Issuance of forfeiture penalty upheld					$ 500
Additional legal expenses accrued															$ 8,000
Number of television stations owned \| station				83
Loss contingency, damages sought, total				$ 3,400
Loss contingency accrual																$ 3,400
Unfavorable Regulatory Action \| Minimum
Loss Contingencies [Line Items]
Proposed fine per station				20
Unfavorable Regulatory Action \| Maximum
Loss Contingencies [Line Items]
Proposed fine per station				26
Management Services Agreement Misconduct
Loss Contingencies [Line Items]
Cash payments for legal settlements													$ 495,000	$ 50,000
Loss contingency, allegations, payments received			$ 1,500,000
Loss contingency, settlement, value of claims released	$ 1,500,000
Loss contingency, damages awarded	$ 495,000
Management Services Agreement Misconduct \| Sinclair Television Group, Inc.
Loss Contingencies [Line Items]
Cash payments for legal settlements													347,000
Management Services Agreement Misconduct \| Sinclair Ventures, LLC
Loss Contingencies [Line Items]
Cash payments for legal settlements													$ 148,000
Breach of Merger Agreement
Loss Contingencies [Line Items]
Amount awarded to other party										$ 48,000
Cash payments for legal settlements								$ 48,000
Compliance plan term										4 years
Number of petitions filed \| petition									2
Various Cases Alleging Violation of Sherman Antitrust Act
Loss Contingencies [Line Items]
Amount awarded to other party		$ 48,000
Loss contingency, new claims filed, number (lawsuit) \| lawsuit											22
Loss contingency, number of other broadcasters \| broadcaster																		13
Sinclair Broadcast Group, LLC
Loss Contingencies [Line Items]
Number of television stations owned \| station																185
Sinclair Broadcast Group, LLC \| Marquee
Loss Contingencies [Line Items]
Guarantee, amount sought																	$ 29,000
Sinclair Broadcast Group, LLC \| Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Proposed fine				$ 2,700			9,000					$ 13,000
Proposed fine per station						$ 25	$ 500
Issuance of forfeiture penalty upheld					$ 500
Additional legal expenses accrued															$ 8,000
Number of television stations owned \| station				83
Loss contingency, damages sought, total				$ 3,400
Loss contingency accrual																$ 3,400
Sinclair Broadcast Group, LLC \| Unfavorable Regulatory Action \| Minimum
Loss Contingencies [Line Items]
Proposed fine per station				20
Sinclair Broadcast Group, LLC \| Unfavorable Regulatory Action \| Maximum
Loss Contingencies [Line Items]
Proposed fine per station				$ 26
Sinclair Broadcast Group, LLC \| Breach of Merger Agreement
Loss Contingencies [Line Items]
Amount awarded to other party										$ 48,000
Cash payments for legal settlements								$ 48,000
Compliance plan term										4 years
Number of petitions filed \| petition									2
Sinclair Broadcast Group, LLC \| Various Cases Alleging Violation of Sherman Antitrust Act
Loss Contingencies [Line Items]
Amount awarded to other party		$ 48,000
Loss contingency, new claims filed, number (lawsuit) \| lawsuit											22
Loss contingency, number of other broadcasters \| broadcaster																		13