Represents amount of long-term debt and capital lease obligation guaranteed by parent.

No definition available.

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

No definition available.

+ Details

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

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sbgi_SeniorUnsecuredNotes5.375PercentDue2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sbgi_SeniorUnsecuredNotes6.125PercentDue2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sbgi_SeniorUnsecuredNotes6.375PercentDue2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sbgi_SeniorUnsecuredNotes5.875PercentDue2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=us-gaap_SubsidiaryIssuerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sbgi_SeniorUnsecuredNotes5.625PercentDue2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=us-gaap_ParentCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

CONDENSED CONSOLIDATING FINANCIAL STATEMENTS (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Debt	$ 4,178.8
5.375% Senior Unsecured Notes due 2021
Debt Instrument [Line Items]
Interest rate	5.375%	5.375%
6.125% Senior Unsecured Notes due 2022
Debt Instrument [Line Items]
Interest rate	6.125%	6.125%
6.375% Senior Notes due 2021
Debt Instrument [Line Items]
Interest rate	6.375%	6.375%
5.875% Senior Unsecured Notes due 2026
Debt Instrument [Line Items]
Interest rate	5.875%
Sinclair Television Group, Inc.
Debt Instrument [Line Items]
Amount of debt guaranteed by parent	$ 4,047.2
Sinclair Television Group, Inc. \| 5.375% Senior Unsecured Notes due 2021
Debt Instrument [Line Items]
Interest rate	5.375%
Sinclair Television Group, Inc. \| 5.625% Senior Unsecured Notes, due 2024
Debt Instrument [Line Items]
Interest rate	5.625%
Sinclair Television Group, Inc. \| 6.125% Senior Unsecured Notes due 2022
Debt Instrument [Line Items]
Interest rate	6.125%
Sinclair Television Group, Inc. \| 6.375% Senior Notes due 2021
Debt Instrument [Line Items]
Interest rate	6.375%
Sinclair Television Group, Inc. \| 5.875% Senior Unsecured Notes due 2026
Debt Instrument [Line Items]
Interest rate	5.875%
Sinclair Broadcast Group, Inc.
Debt Instrument [Line Items]
Amount of debt guaranteed by parent	$ 3,996.7
Sinclair Broadcast Group, Inc. \| 5.375% Senior Unsecured Notes due 2021
Debt Instrument [Line Items]
Interest rate	5.375%
Sinclair Broadcast Group, Inc. \| 5.625% Senior Unsecured Notes, due 2024
Debt Instrument [Line Items]
Interest rate	5.625%
Sinclair Broadcast Group, Inc. \| 6.125% Senior Unsecured Notes due 2022
Debt Instrument [Line Items]
Interest rate	6.125%
Sinclair Broadcast Group, Inc. \| 6.375% Senior Notes due 2021
Debt Instrument [Line Items]
Interest rate	6.375%
Sinclair Broadcast Group, Inc. \| 5.875% Senior Unsecured Notes due 2026
Debt Instrument [Line Items]
Interest rate	5.875%