Debt Instrument, Purchase Of Lenders' Rights and Obligations, Payment

No definition available.

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

- Definition

Debt Instrument, Purchase Of Lenders' Rights and Obligations, Percentage Of Principal Amount Outstanding

+ References

No definition available.

+ Details

Name:	sbgi_DebtInstrumentPurchaseOfLendersRightsAndObligationsPercentageOfPrincipalAmountOutstanding
Namespace Prefix:	sbgi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=sbgi_ARFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SUBSEQUENT EVENTS (Details) - USD ($)	1 Months Ended
SUBSEQUENT EVENTS (Details) - USD ($)	Nov. 30, 2021	Nov. 05, 2021	Sep. 23, 2020
A/R Facility \| Line of Credit Facility
Subsequent Event [Line Items]
Maximum borrowing capacity			$ 250,000,000
Subsequent Event
Subsequent Event [Line Items]
Dividends declared per share (in USD per share)	$ 0.20
Subsequent Event \| A/R Facility \| Line of Credit Facility
Subsequent Event [Line Items]
Payment to purchase lenders' rights and obligations		$ 184,400,000
Payment to purchase lenders' rights and obligations as a proportion of total aggregate outstanding principal amount (as a percent)		101.00%
Maximum borrowing capacity		$ 400,000,000