Short-Term Loans (Details 2) (EQT Midstream Partners, Line of credit)	Dec. 31, 2013
EQT Midstream Partners \| Line of credit
Short-Term Loans
Consolidated leverage ratio before obtaining investment grade rating	5
Consolidated leverage ratio after obtaining investment grade rating	5.5
Consolidated interest coverage ratio, until obtaining an investment grade rating	3

Represents the ratio of consolidated adjusted earnings before interest, taxes, depreciation and amortization to interest expense, which is necessary to be maintained under the terms of the senior credit facilities' covenants, until obtaining investment grade rating.

No definition available.

Name:	eqt_DebtInstrumentCovenantConsolidatedInterestCoverageRatioUntilObtainingInvestmentGradeRating
Namespace Prefix:	eqt_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant