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Financial Statements (Details)	12 Months Ended
	Dec. 31, 2011	Feb. 13, 2012
Financial Statements
Ownership percentage of partnership		100.00%
Percentage of Midstream segment's assets	29.00%

X

- Definition

Represents the percentage of ownership interest in entity's subsidiary contributed to new entity.

+ References

No definition available.

+ Details

Name:	eqt_BusinessAcquisitionPercentageOfEquityInterestInSubsidiaryContributed
Namespace Prefix:	eqt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the percentage of a segment's assets held by a consolidated subsidiary of the entity.

+ References

No definition available.

+ Details

Name:	eqt_PercentageOfSegmentAssets
Namespace Prefix:	eqt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

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