Represents the part of consideration to be paid by the entity in the significant acquisition or disposal, which is to be deposited into escrow account.

No definition available.

Name:	sbgi_SignificantAcquisitionsAndDisposalsAcquisitionCostsAmountToBeDepositedIntoEscrowAccount
Namespace Prefix:	sbgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (Details 4) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Acquisitions and divestments, pending agreements	Mar. 31, 2013 Acquisitions and divestments, pending agreements
Restricted Cash
Purchase price to be deposited into escrow account			$ 11.5	$ 25.0
Restricted cash to be held, related to removal of analog equipment	$ 0.2	$ 0.2