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EQT GP Holdings, LP (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended
--- | --- | ---
Apr. 25, 2017 | Mar. 31, 2017
General Partner Common |  |
Class of Stock [Line Items] |  |
Incentive distribution rights distributed in respect of each common unit and general partner unit (in dollars per share) |  | $ 0.5250
EQGP |  |
Class of Stock [Line Items] |  |
Percentage of all incremental cash distributed (up to) |  | 48.00%
EQGP | Subsequent Event |  |
Class of Stock [Line Items] |  |
Cash distribution declared (in dollars per share) | $ 0.191 |
Cash distribution declared | $ 50.8 |
EQGP | General Partner |  |
Class of Stock [Line Items] |  |
General partner interest (as a percent) |  | 1.80%
EQGP | Affiliated Entity | Limited Partner Common |  |
Class of Stock [Line Items] |  |
Number of common units (in shares) |  | 21,811,643
Limited partner interest (as a percent) |  | 26.60%
EQGP | Affiliated Entity | General Partner |  |
Class of Stock [Line Items] |  |
Number of general partner units (in shares) |  | 1,443,015

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- Definition Amount of equity impact of cash distribution declared to unit-holder of limited partnership (LP). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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=27012166&loc=d3e187085-122770 + Details
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