EQGP 10-Q 25 Oct 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	9 Months Ended
	Sep. 30, 2018shares
Document and Entity Information
Entity Registrant Name	EQGP Holdings, LP
Entity Central Index Key	1,632,933
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Amendment Flag	false
Current Fiscal Year End	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Small Business Entity	false
Entity Common Units, Unit Outstanding	302,458,766
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3

Statements of Consolidated Oper

Statements of Consolidated Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018		Sep. 30, 2017
Income Statement [Abstract]
Operating revenues	[1],[2]	$ 364,584	$ 206,293	$ 1,110,307		$ 603,180
Operating expenses:
Operating and maintenance	[1],[3]	48,092	19,589	118,534		54,721
Selling, general and administrative	[1],[3]	31,619	19,301	94,229		54,314
Depreciation	[1]	43,567	22,244	126,957	[4]	64,191	[4]
Amortization of intangible assets	[1]	10,387	0	31,160	[4]	0	[4]
Total operating expenses	[1]	133,665	61,134	370,880		173,226
Operating income	[1]	230,919	145,159	739,427		429,954
Equity income	[1],[5]	16,087	6,025	35,836	[4]	15,413	[4]
Other income	[1]	1,345	637	3,193		3,576
Net interest expense	[1],[6]	40,966	9,414	76,661		25,994
Net income	[1]	207,385	142,407	701,795	[4]	422,949	[4]
Net income attributable to noncontrolling interests	[1]	109,896	75,463	355,355		231,299
Net income attributable to EQGP Holdings, LP	[1]	97,489	66,944	346,440		191,650
Calculation of limited partner interest in net income:
Net income attributable to EQT GP Holdings, LP	[1]	97,489	66,944	346,440		191,650
Less pre-acquisition net income allocated to parent	[1]	(2,386)	0	(78,775)		0
Limited partner interest in net income	[1]	$ 95,103	$ 66,944	$ 267,665		$ 191,650
Net income per common unit – basic and diluted (in dollars per share)	[1]	$ 0.31	$ 0.25	$ 0.94		$ 0.72
Weighted average common units outstanding – basic and diluted (in shares)	[1]	302,490	266,186	284,342		266,185
Cash distributions declared per unit (in dollars per share)	[1],[7]	$ 0.315	$ 0.228	$ 0.879		$ 0.629
[1]	As discussed in Note A, the consolidated financial statements of EQGP Holdings, LP (formerly known as EQT GP Holdings, LP) (EQGP) have been retrospectively recast to include the pre-acquisition results of Rice Olympus Midstream LLC (ROM), Strike Force Midstream Holdings LLC (Strike Force) and Rice West Virginia Midstream LLC (Rice WV), which were acquired by EQM effective on May 1, 2018 (the May 2018 Acquisition), and Rice Midstream Partners LP (RMP), which was acquired by EQM effective on July 23, 2018 (the EQM-RMP Merger), because these transactions were between entities under common control.
[2]	Operating revenues included affiliate revenues from EQT Corporation and subsidiaries (collectively, EQT) of $276.9 million and $154.2 million for the three months ended September 30, 2018 and 2017, respectively, and $827.8 million and $445.8 million for nine months ended September 30, 2018 and 2017, respectively. See Note F.
[3]	Operating and maintenance expense included charges from EQT of $14.0 million and $10.7 million for the three months ended September 30, 2018 and 2017, respectively, and $38.4 million and $29.8 million for the nine months ended September 30, 2018 and 2017, respectively. Selling, general and administrative expense included charges from EQT of $28.3 million and $18.6 million for the three months ended September 30, 2018 and 2017, respectively, and $80.8 million and $52.0 million for the nine months ended September 30, 2018 and 2017, respectively. See Note F.
[4]	As discussed in Note A, the consolidated financial statements of EQGP have been retrospectively recast to include the pre-acquisition results of the May 2018 Acquisition and the EQM-RMP Merger because these transactions were between entities under common control.
[5]	Represents equity income from Mountain Valley Pipeline, LLC (the MVP Joint Venture). See Note G.
[6]	Net interest expense included interest income on the Preferred Interest in EES of $1.6 million and $1.7 million for the three months ended September 30, 2018 and 2017, respectively, and $5.0 million and $5.1 million for the nine months ended September 30, 2018 and 2017, respectively.
[7]	Represents the cash distributions declared related to the period presented. See Note J.

Statements of Consolidated Op_2

Statements of Consolidated Operations (Unaudited) (Parenthetical) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Operating and maintenance expense	[1],[2]	$ 48,092	$ 19,589	$ 118,534	$ 54,721
Selling, general and administrative expense	[1],[2]	31,619	19,301	94,229	54,314
EES
Interest income		1,600	1,700	5,000	5,100
EQT Corporation and Subsidiaries
Affiliate revenues		276,900	154,200	827,800	445,800
Operating and maintenance expense		14,000	10,700	38,400	29,800
Selling, general and administrative expense		$ 28,300	$ 18,600	$ 80,800	$ 52,000
[1]	As discussed in Note A, the consolidated financial statements of EQGP Holdings, LP (formerly known as EQT GP Holdings, LP) (EQGP) have been retrospectively recast to include the pre-acquisition results of Rice Olympus Midstream LLC (ROM), Strike Force Midstream Holdings LLC (Strike Force) and Rice West Virginia Midstream LLC (Rice WV), which were acquired by EQM effective on May 1, 2018 (the May 2018 Acquisition), and Rice Midstream Partners LP (RMP), which was acquired by EQM effective on July 23, 2018 (the EQM-RMP Merger), because these transactions were between entities under common control.
[2]	Operating and maintenance expense included charges from EQT of $14.0 million and $10.7 million for the three months ended September 30, 2018 and 2017, respectively, and $38.4 million and $29.8 million for the nine months ended September 30, 2018 and 2017, respectively. Selling, general and administrative expense included charges from EQT of $28.3 million and $18.6 million for the three months ended September 30, 2018 and 2017, respectively, and $80.8 million and $52.0 million for the nine months ended September 30, 2018 and 2017, respectively. See Note F.

Statements of Consolidated Cash

Statements of Consolidated Cash Flows (Unaudited) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	[1],[2]	$ 701,795	$ 422,949
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	[1],[2]	126,957	64,191
Amortization of intangible assets	[1],[2]	31,160	0
Equity income	[1],[2],[3]	(35,836)	(15,413)
AFUDC – equity	[2]	(3,585)	(4,128)
Non-cash long-term compensation expense	[2]	1,553	451
Changes in other assets and liabilities:
Accounts receivable	[2]	2,193	(1,106)
Accounts payable	[2]	28,172	1,848
Due to/from EQT affiliates	[2]	(11,720)	7,271
Other assets and other liabilities	[2]	22,320	3,503
Net cash provided by operating activities	[2]	863,009	479,566
Cash flows from investing activities:
Capital expenditures	[2]	(616,365)	(224,591)
Capital contributions to the MVP Joint Venture	[2]	(446,049)	(103,448)
May 2018 Acquisition from EQT	[2]	(1,193,160)	0
Principal payments received on the Preferred Interest	[2]	3,281	3,103
Net cash used in investing activities	[2]	(2,252,293)	(324,936)
Cash flows from financing activities:
Proceeds from credit facility borrowings of EQM and RMP	[2]	2,524,000	334,000
Payments on credit facility borrowings of EQM and RMP	[2]	(2,968,000)	(229,000)
Proceeds from EQM's issuance of long-term debt	[2]	2,500,000	0
EQM debt discount and issuance costs	[2]	(34,249)	(2,257)
Net proceeds from / (payments on) the EQGP Working Capital Facility	[2]	32	(55)
Distributions paid to EQGP unitholders	[2]	(226,167)	(153,844)
Acquisition of 25% of Strike Force Midstream LLC	[2]	(175,000)	0
Capital contributions	[2]	15,672	216
Net contributions from EQT	[2]	3,660	0
Net cash provided by (used in) financing activities	[2]	1,340,446	(208,150)
Net change in cash and cash equivalents	[2]	(48,838)	(53,520)
Cash and cash equivalents at beginning of period	[2]	54,900	60,453
Cash and cash equivalents at end of period	[2]	6,062	6,933
Cash paid during the period for:
Interest, net of amount capitalized	[2]	42,655	31,093
Non-cash activity during the period for:
(Decrease) increase in capital contribution receivable from EQT	[2]	(11,758)	758
EQM and RMP
Cash flows from financing activities:
Distributions paid to EQGP unitholders	[2]	(298,752)	(157,210)
Strike Force Midstream LLC
Cash flows from financing activities:
Distributions paid to EQGP unitholders	[2]	$ (750)	$ 0
[1]	As discussed in Note A, the consolidated financial statements of EQGP Holdings, LP (formerly known as EQT GP Holdings, LP) (EQGP) have been retrospectively recast to include the pre-acquisition results of Rice Olympus Midstream LLC (ROM), Strike Force Midstream Holdings LLC (Strike Force) and Rice West Virginia Midstream LLC (Rice WV), which were acquired by EQM effective on May 1, 2018 (the May 2018 Acquisition), and Rice Midstream Partners LP (RMP), which was acquired by EQM effective on July 23, 2018 (the EQM-RMP Merger), because these transactions were between entities under common control.
[2]	As discussed in Note A, the consolidated financial statements of EQGP have been retrospectively recast to include the pre-acquisition results of the May 2018 Acquisition and the EQM-RMP Merger because these transactions were between entities under common control.
[3]	Represents equity income from Mountain Valley Pipeline, LLC (the MVP Joint Venture). See Note G.

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	[1]	$ 6,062	$ 54,900
Accounts receivable (net of allowance for doubtful accounts of $717 and $446 as of September 30, 2018 and December 31, 2017, respectively)	[1]	58,358	60,551
Accounts receivable – affiliate	[1]	167,481	158,720
Other current assets	[1]	9,394	14,367
Total current assets	[1]	241,295	288,538
Property, plant and equipment	[1]	6,127,076	5,516,504
Less: accumulated depreciation	[1]	(518,718)	(405,665)
Net property, plant and equipment	[1]	5,608,358	5,110,839
Investment in unconsolidated entity	[1]	1,300,430	460,546
Goodwill	[1]	1,384,872	1,384,872
Intangible assets, net	[1]	586,500	617,660
Other assets	[1]	146,685	137,179
Total assets	[1]	9,268,140	7,999,634
Current liabilities:
Accounts payable	[1]	134,027	105,273
Due to related party	[1]	44,285	35,453
Capital contribution payable to MVP Joint Venture	[1]	463,733	105,734
Accrued interest	[1]	46,165	11,067
Accrued liabilities	[1]	16,401	20,995
Total current liabilities	[1]	704,611	278,522
Credit facility borrowings of EQM and RMP	[1]	22,000	466,000
EQM senior notes	[1]	3,455,296	987,352
Regulatory and other long-term liabilities	[1]	31,010	29,633
Total liabilities	[1]	4,212,917	1,761,507
Equity:
Predecessor equity	[1]	0	2,350,913
Common (302,458,766 and 266,165,000 common units issued and outstanding at September 30, 2018 and December 31, 2017, respectively)	[1]	299,927	(1,013,913)
Total equity	[1]	5,055,223	6,238,127
Total liabilities and equity	[1]	9,268,140	7,999,634
Predecessor noncontrolling interests
Equity:
Predecessor noncontrolling interests	[1]	0	1,738,993
Total equity	[1]	0	1,738,993
Noncontrolling interests of EQM
Equity:
Predecessor noncontrolling interests	[1]	4,755,296	3,162,134
Total equity	[1]	$ 4,755,296	$ 3,162,134
[1]	As discussed in Note A, the consolidated financial statements of EQGP have been retrospectively recast to include the pre-acquisition results of the May 2018 Acquisition and the EQM-RMP Merger because these transactions were between entities under common control.

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands		Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	[1]	$ 717	$ 446
Partners' capital common units issued (in shares)	[1]	302,458,766	266,165,000
Partners' capital common units outstanding (in shares)	[1]	302,458,766	266,165,000
[1]	As discussed in Note A, the consolidated financial statements of EQGP have been retrospectively recast to include the pre-acquisition results of the May 2018 Acquisition and the EQM-RMP Merger because these transactions were between entities under common control.

Statements of Consolidated Equi

Statements of Consolidated Equity (Unaudited) - USD ($) $ in Thousands		Total		Predecessor noncontrolling interests	Common	Noncontrolling interests of EQM	Predecessor Equity	EQM and RMP	EQM and RMPNoncontrolling interests of EQM	EQM and RMPPredecessor Equity	Strike Force Midstream LLC	Strike Force Midstream LLCPredecessor noncontrolling interests
Beginning balance at Dec. 31, 2016	[1]	$ 1,992,722		$ 0	$ (1,077,100)	$ 3,069,822	$ 0
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	[1]	422,949	[2]		191,650	231,299
Capital contributions	[1]	2,624			2,624
Equity-based compensation plans	[1]	451			261	190
Distributions paid to noncontrolling interest unitholders of EQM and RMP	[1]	(157,210)				(157,210)
Distributions paid to EQGP unitholders	[1]	(153,844)			(153,844)
Ending balance at Sep. 30, 2017	[1]	2,107,692		0	(1,036,409)	3,144,101	0
Beginning balance at Dec. 31, 2017	[1]	6,238,127		1,738,993	(1,013,913)	3,162,134	2,350,913
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	[1]	701,795	[2]	88,813	267,665	266,542	78,775
Capital contributions	[1]	3,917			3,917
Equity-based compensation plans	[1]	1,553		662	350	281	260
Distributions paid to noncontrolling interest unitholders of EQM and RMP	[1]			(43,877)				$ (298,752)	$ (230,362)	$ (24,513)	$ (750)	$ (750)
Distributions paid to EQGP unitholders	[1]	(226,167)			(226,167)
Changes in ownership of EQM, net	[1],[3]	0		145	298,879	(298,879)				$ (145)
Net contributions from EQT	[1]	3,660					3,660
Acquisition of 25% of Strike Force Midstream LLC	[1]	(175,000)		(176,068)	1,068
May 2018 Acquisition from EQT	[1],[4]	(1,193,160)			243,137		(1,436,297)
EQM-RMP Merger (3)	[1]	0		(1,607,918)	724,991	1,855,580	(972,653)
Ending balance at Sep. 30, 2018	[1]	$ 5,055,223		$ 0	$ 299,927	$ 4,755,296	$ 0
[1]	As discussed in Note A, the consolidated financial statements of EQGP have been retrospectively recast to include the pre-acquisition results of the May 2018 Acquisition and the EQM-RMP Merger because these transactions were between entities under common control.
[2]	As discussed in Note A, the consolidated financial statements of EQGP Holdings, LP (formerly known as EQT GP Holdings, LP) (EQGP) have been retrospectively recast to include the pre-acquisition results of Rice Olympus Midstream LLC (ROM), Strike Force Midstream Holdings LLC (Strike Force) and Rice West Virginia Midstream LLC (Rice WV), which were acquired by EQM effective on May 1, 2018 (the May 2018 Acquisition), and Rice Midstream Partners LP (RMP), which was acquired by EQM effective on July 23, 2018 (the EQM-RMP Merger), because these transactions were between entities under common control.
[3]	EQGP recorded an increase to common units and a corresponding decrease to noncontrolling interests to reflect the change in the noncontrolling interest's ownership in EQM's net assets.
[4]	Under common control accounting, any difference between consideration transferred and the net assets received at historical cost is recorded as an equity transaction. In addition, equity issued in a common control transaction is recorded at an amount equal to the carrying value of the net assets transferred, even if the equity issued has a readily determinable fair value. The EQM common units issued in the May 2018 Acquisition are valued at the excess of the net assets received by EQM over the cash consideration.

Statements of Consolidated Eq_2

Statements of Consolidated Equity (Unaudited) (Parenthetical)	May 01, 2018
Strike Force Midstream
Percentage of voting interests acquired	25.00%

Financial Statements

Financial Statements	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Financial Statements	Financial Statements Organization and Basis of Presentation EQGP owns EQT's partnership interests in EQM, a growth-oriented Delaware limited partnership. EQM Midstream Services, LLC (formerly known as EQT Midstream Services, LLC) (EQM General Partner), is a direct wholly owned subsidiary of EQGP and is the general partner of EQM. EQGP Services, LLC (formerly known as EQT GP Services, LLC) (EQGP General Partner), is an indirect wholly owned subsidiary of EQT and is the general partner of EQGP. EQGP was formed under the name EQT GP Holdings, LP and changed its name to EQGP Holdings, LP in October 2018. EQGP has no independent operations or material assets other than its partnership interests in EQM (see Note K). EQGP's financial statements differ from those of EQM primarily as a result of noncontrolling interest ownership attributable to the publicly held limited partner interests in EQM and additional expenses incurred by EQGP, which include selling, general and administrative expenses and net interest expense or income. The accompanying unaudited consolidated financial statements have been prepared in accordance with GAAP for interim financial information and with the requirements of Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, these unaudited consolidated financial statements include all adjustments (consisting of only normal recurring adjustments, unless otherwise disclosed in this Form 10-Q) necessary for a fair presentation of the financial position of EQGP as of September 30, 2018 and December 31, 2017 , the results of its operations for the three and nine months ended September 30, 2018 and 2017 , and its cash flows and equity for the nine months ended September 30, 2018 and 2017 . Certain previously reported amounts have been reclassified to conform to the current year presentation. The balance sheet at December 31, 2017 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by GAAP for complete financial statements. EQGP's consolidated financial statements have been retrospectively recast to include the pre-acquisition results of the May 2018 Acquisition and the EQM-RMP Merger because these transactions were between entities under common control. The recast is for the period the acquired businesses were under the common control of EQT, which began on November 13, 2017 as a result of EQT's merger with Rice Energy Inc. (Rice) (the Rice Merger). EQM recorded the assets and liabilities acquired in the May 2018 Acquisition and the EQM-RMP Merger at their carrying amounts to EQT on the effective dates of the transactions. The consolidated financial statements are not necessarily indicative of the actual results of operations if EQM and the assets acquired in the May 2018 Acquisition and the EQM-RMP Merger had been operated together during the pre-acquisition periods. Due to the seasonal nature of EQM's utility customer contracts, the interim statements for the three and nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018 . For further information, refer to the consolidated financial statements and related footnotes and "Management's Discussion and Analysis of Financial Condition and Results of Operations" included in EQGP's Annual Report on Form 10-K for the year ended December 31, 2017 . Recently Issued Accounting Standards In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers . The standard requires an entity to recognize revenue in a manner that depicts the transfer of goods or services to customers at an amount that reflects the consideration the entity expects in exchange for those goods or services. EQGP adopted this standard on January 1, 2018 using the modified retrospective method of adoption. Adoption of the ASU did not require an adjustment to the opening balance of equity. EQGP does not expect the standard to have a significant effect on its results of operations, liquidity or financial position. EQGP implemented processes and controls to ensure new contracts are reviewed for the appropriate accounting treatment and to generate the disclosures required under the new standard in the first quarter of 2018. For the disclosures required by this ASU, see Note C. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments-Overall: Recognition and Measurement of Financial Assets and Financial Liabilities . The standard primarily affects accounting for equity investments, financial liabilities under the fair value option, the presentation and disclosure requirements for financial instruments and eliminates the cost method of accounting for equity investments. EQGP adopted this standard in the first quarter of 2018 with no significant effect on its financial statements or related disclosures. In February 2016, the FASB issued ASU No. 2016-02, Leases . The standard requires an entity to record assets and obligations for contracts currently recognized as operating leases. In July 2018, the FASB also targeted improvements to this ASU in ASU 2018-11. This update provides entities with an optional transition method, which permits an entity to initially apply the new leases standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. EQGP has elected to utilize the optional transition method. The ASU will be effective for annual reporting periods beginning after December 15, 2018, including interim periods within that reporting period, with early adoption permitted. EQGP is utilizing a lease accounting system to document its current population of contracts classified as leases, which will be updated as EQGP's lease population changes. EQGP continues to evaluate new business processes and related internal controls and is assessing and documenting the accounting impacts related to the new standard. Although the evaluation is ongoing, EQGP expects that the adoption will impact its financial statements as the standard requires recognition on the balance sheet of a right of use asset and corresponding lease liability. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses: Measurement of Credit Losses on Financial Instruments. This ASU amends guidance on reporting credit losses for assets held at amortized cost basis and available for sale debt securities. For assets held at amortized cost basis, this ASU eliminates the probable initial recognition threshold in current GAAP and requires an entity to reflect its current estimate of all expected credit losses. The amendments affect loans, debt securities, trade receivables, net investments in leases, off balance sheet credit exposures, reinsurance receivables, and any other financial assets not excluded from the scope that have the contractual right to receive cash. The ASU will be effective for annual reporting periods beginning after December 15, 2019, including interim periods within that reporting period. EQGP is currently evaluating the effect this standard will have on its financial statements and related disclosures. In January 2017, the FASB issued ASU 2017-04, Simplifying the Test of Goodwill Impairment . ASU 2017-04 simplifies the quantitative goodwill impairment test requirements by eliminating the requirement to calculate the implied fair value of goodwill. Instead, a company would record an impairment charge based on the excess of a reporting unit’s carrying value over its fair value. The standard’s provisions are to be applied prospectively. EQGP adopted this standard in the first quarter of 2018 with no significant effect on its financial statements or related disclosures. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement, Changes to the Disclosure Requirements for Fair Value Measurement , which makes a number of changes to the hierarchy associated with Level 1, 2 and 3 fair value measurements and the related disclosure requirements. This guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. EQGP is currently evaluating the effect this standard will have on its financial statements and related disclosures but does not expect the adoption of this standard to have a material impact on its financial statements and related disclosures.

Acquisitions and Merger

Acquisitions and Merger	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Acquisitions and Merger	Acquisitions and Merger May 2018 Acquisition On April 25, 2018, EQT, Rice Midstream Holdings LLC, a wholly owned subsidiary of EQT, EQM and EQM Gathering Holdings, LLC (EQM Gathering), a wholly owned subsidiary of EQM, entered into a Contribution and Sale Agreement pursuant to which EQM Gathering acquired from EQT all of EQT's interests in ROM, Strike Force and Rice WV in exchange for an aggregate of 5,889,282 EQM common units and aggregate cash consideration of $1.15 billion , plus working capital adjustments. ROM owns a natural gas gathering system that gathers gas from wells located primarily in Belmont County, Ohio. Strike Force owns a 75% limited liability company interest in Strike Force Midstream LLC (Strike Force Midstream). The May 2018 Acquisition closed on May 22, 2018 with an effective date of May 1, 2018 . EQM-RMP Merger On April 25, 2018, EQM entered into an Agreement and Plan of Merger (the Merger Agreement) with RMP, Rice Midstream Management LLC, the general partner of RMP (the RMP General Partner), the EQM General Partner, EQM Acquisition Sub, LLC, a wholly owned subsidiary of EQM (Merger Sub), EQM GP Acquisition Sub, LLC, a wholly owned subsidiary of EQM (GP Merger Sub), and, solely for certain limited purposes set forth therein, EQT. Pursuant to the Merger Agreement, on July 23, 2018, Merger Sub and GP Merger Sub merged with and into RMP and the RMP General Partner, respectively, with RMP and the RMP General Partner surviving as wholly owned subsidiaries of EQM. Pursuant to the Merger Agreement, each RMP common unit issued and outstanding immediately prior to the effective time of the EQM-RMP Merger was converted into the right to receive 0.3319 EQM common units (the Merger Consideration), the issued and outstanding IDRs of RMP were canceled and each outstanding award of phantom units in respect of RMP common units fully vested and converted into the right to receive the Merger Consideration, less applicable tax withholding, in respect of each RMP common unit subject thereto. The aggregate Merger Consideration consisted of approximately 34 million EQM common units of which 9,544,530 EQM common units were received by an indirect wholly owned subsidiary of EQT. As a result of the EQM-RMP Merger , RMP's common units are no longer publicly traded. As a result of the recast, EQM recognized approximately $1,384.9 million of goodwill. The goodwill value was based on a valuation performed by EQT as of November 13, 2017 with regard to the Rice Merger. EQT recorded goodwill as the excess of the estimated enterprise value of RMP, ROM, Strike Force and Rice WV over the sum of the fair value amounts allocated to the assets and liabilities of RMP, ROM, Strike Force and Rice WV. Goodwill was attributed to additional growth opportunities, synergies and operating leverage within the Gathering segment. Prior to the recast, EQM had no goodwill. The following table summarizes the allocation of the fair value of the assets and liabilities of RMP, ROM, Strike Force and Rice WV as of November 13, 2017 through pushdown accounting from EQT. The preliminary allocation to certain assets and/or liabilities may be adjusted by material amounts as EQT continues to finalize the fair value estimates. At November 13, 2017 (Thousands) Estimated fair value of RMP, ROM, Strike Force and Rice WV (1) $ 4,014,984 Estimated Fair Value of Assets Acquired and Liabilities Assumed: Current assets (2) 132,459 Intangible assets (3) 623,200 Property and equipment, net (4) 2,265,900 Other non-current assets 118 Current liabilities (2) (116,242 ) RMP $850 Million Facility (5) (266,000 ) Other non-current liabilities (5) (9,323 ) Total estimated fair value of assets acquired and liabilities assumed 2,630,112 Goodwill $ 1,384,872 (1) Includes the estimated fair value attributable to noncontrolling interest of $166 million . (2) The fair value of current assets and current liabilities were assumed to approximate their carrying values. (3) The identifiable intangible assets for customer relationships were estimated by applying a discounted cash flow approach which was adjusted for customer attrition assumptions and projected market conditions. (4) The estimated fair value of long-lived property and equipment were determined utilizing estimated replacement cost adjusted for a usage or obsolescence factor. (5) The estimated fair value of long-term liabilities was determined utilizing observable market inputs where available or estimated based on their then current carrying values. As a result of the recast, EQM also recognized approximately $623.2 million in intangible assets. These intangible assets were valued by EQT based upon the estimated fair value of the customer contracts as of November 13, 2017. The customer contracts were assigned a useful life of 15 years and are amortized on a straight-line basis. Amortization expense for the three and nine months ended September 30, 2018 was $10.4 million and $31.2 million , respectively. As of September 30, 2018 and December 31, 2017, accumulated amortization was $36.7 million and $5.5 million , respectively. There was no amortization expense recognized for the three and nine months ended September 30, 2017 . The estimated annual amortization expense over the next five years is $41.5 million . As a result of the recast, EQM recognized a liability for AROs related to dismantling, reclaiming and disposing of the water services assets. Based on an estimate of the timing and amount of their settlement, EQM recorded a liability and capitalized a corresponding amount to asset retirement costs. The liability was estimated using the present value of expected future cash flows, adjusted for inflation and discounted at EQM's credit-adjusted, risk-free rate. The current portion of the AROs was recorded in regulatory and other long-term liabilities on the consolidated balance sheets. The following table presents a reconciliation of the AROs for the periods from November 13, 2017 through September 30, 2018. Asset Retirement Obligations (Thousands) Balance at November 13, 2017 $ 9,286 Accretion expense 35 Balance at December 31, 2017 $ 9,321 Accretion expense 321 Balance at September 30, 2018 $ 9,642 Gulfport Transaction On May 1, 2018, pursuant to the Purchase and Sale Agreement dated April 25, 2018, by and among EQM, EQM Gathering, Gulfport Energy Corporation (Gulfport) and an affiliate of Gulfport, EQM Gathering acquired the remaining 25% limited liability company interest in Strike Force Midstream not owned by Strike Force for $175 million (the Gulfport Transaction). As a result, EQM owned 100% of Strike Force Midstream effective as of May 1, 2018. Investment in RMP IDRs On May 22, 2018, pursuant to an Incentive Distribution Rights Purchase and Sale Agreement dated April 25, 2018, by and among EQT, Rice Midstream GP Holdings LP (Rice Midstream GP Holdings), a wholly owned subsidiary of EQT that owned the RMP IDRs, and EQGP (the IDR Purchase Agreement), EQGP acquired all of the issued and outstanding RMP IDRs in exchange for 36,293,766 EQGP common units (the IDR Transaction). The IDR Purchase Agreement provided for the forfeiture of a portion of the EQGP common units if the EQM-RMP Merger was not complete by December 31, 2018. The investment in RMP IDRs was a transfer of financial assets between entities under common control. The fair value of $865 million was based on a discounted cash flow model, which is a Level 2 measurement. Pursuant to the terms of the Merger Agreement, the RMP IDRs were canceled at the completion of the EQM-RMP Merger and the value of the RMP IDRs will be realized through the EQM IDRs.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	Revenue from Contracts with Customers As discussed in Note A, EQGP adopted ASU No. 2014-09, Revenue from Contracts with Customers , on January 1, 2018 using the modified retrospective method of adoption. EQGP applied the standard to all open contracts as of the date of initial application. Adoption of the standard did not require an adjustment to the opening balance of equity and did not materially change EQGP's amount or timing of revenues. For the three and nine months ended September 30, 2018 and 2017 , all revenues recognized on EQM's statements of consolidated operations are from contracts with customers. As of September 30, 2018 and December 31, 2017 , all receivables recorded on EQM's consolidated balance sheets represent performance obligations that have been satisfied and for which an unconditional right to consideration exists. Gathering, Transmission and Storage Service Contracts. EQM provides gathering, transmission and storage services in two manners: firm service and interruptible service. Firm service contracts are typically long-term and include firm reservation fees, which are fixed, monthly charges for the guaranteed reservation of pipeline or storage capacity. Volumetric-based fees can also be charged under firm contracts for each firm volume actually transported, gathered or stored as well as for volumes transported, gathered or stored in excess of the firm contracted volume. Interruptible service contracts include volumetric-based fees, which are charges for the volume of gas gathered, transported or stored and generally do not guarantee access to the pipeline or storage facility. These contracts can be short or long-term. Firm and interruptible contracts are billed at the end of each calendar month, with payment typically due within 21 days. Under a firm contract, EQM has a stand-ready obligation to provide the service over the life of the contract. The performance obligation for firm reservation fee revenue is satisfied over time as the pipeline capacity is made available to the customer. As such, EQM recognizes firm reservation fee revenue evenly over the contract period, using a time-elapsed output method to measure progress. The performance obligation for volumetric-based fee revenue is generally satisfied upon EQM's monthly billing to the customer for volumes gathered, transported or stored during the month. The amount billed corresponds directly to the value of EQM's performance to date as the customer obtains value as each volume is gathered, transported or stored. Certain of EQM's gas gathering agreements are structured with minimum volume commitments (MVCs), which specify minimum quantities for which a customer will be charged regardless of quantities gathered under the contract. Revenue is recognized for MVCs when the performance obligation has been met, which is the earlier of when the gas is gathered or when it is remote that the producer will be able to meet its MVC. Water Service Contracts. EQM's water service revenues represent fees charged by EQM for the delivery of fresh water to a customer at a specified delivery point and for the collection and recycling or disposal of flowback and produced water. All of EQM’s water service revenues are generated pursuant to variable price per volume contracts with customers. For fresh water service contracts, the only performance obligation in each contract is for EQM to provide water (usually a minimum daily volume of water) to the customer at a designated delivery point. For flowback and produced water, the performance obligation is collection and disposition of the water which typically occur within the same day. For all water service arrangements, the customer is typically invoiced on a monthly basis with payment due 21 days after the receipt of the invoice. Summary of Disaggregated Revenues. The tables below provide disaggregated revenue information by EQM business segment. Three Months Ended September 30, 2018 Gathering Transmission Water Total (Thousands) Firm reservation fee revenues $ 112,598 $ 82,669 $ — $ 195,267 Volumetric based fee revenues: Usage fees under firm contracts (1) 8,661 5,331 — 13,992 Usage fees under interruptible contracts (2) 131,602 1,350 — 132,952 Total volumetric based fee revenues 140,263 6,681 — 146,944 Water service revenues — — 22,373 22,373 Total operating revenues $ 252,861 $ 89,350 $ 22,373 $ 364,584 Nine Months Ended September 30, 2018 Gathering Transmission Water Total (Thousands) Firm reservation fee revenues $ 334,233 $ 262,666 $ — $ 596,899 Volumetric based fee revenues: Usage fees under firm contracts (1) 30,725 13,981 — 44,706 Usage fees under interruptible contracts (2) 366,482 8,782 — 375,264 Total volumetric based fee revenues 397,207 22,763 — 419,970 Water service revenues — — 93,438 93,438 Total operating revenues $ 731,440 $ 285,429 $ 93,438 $ 1,110,307 (1) Includes fees on volumes gathered and transported in excess of firm contracted capacity as well as usage fees and fees on all volumes transported under firm contracts. (2) Includes volumes from contracts under which EQM has agreed to hold capacity available without charging a capacity reservation fee. Summary of Remaining Performance Obligations. The following table summarizes the transaction price allocated to EQM's remaining performance obligations under all contracts with firm reservation fees and MVCs as of September 30, 2018 . 2018 (1) 2019 2020 2021 2022 Thereafter Total (Thousands) Gathering firm reservation fees $ 113,018 $ 476,270 $ 552,197 $ 562,196 $ 562,196 $ 2,834,111 $ 5,099,988 Gathering revenues supported by MVCs — 65,700 71,370 71,175 71,175 136,875 416,295 Transmission firm reservation fees 94,077 346,893 344,328 339,588 334,522 2,477,808 3,937,216 Total $ 207,095 $ 888,863 $ 967,895 $ 972,959 $ 967,893 $ 5,448,794 $ 9,453,499 (1) October 1 through December 31 Based on total projected contractual revenues, including projected contractual revenues from additional pipeline capacity that will result from expansion projects that are not yet fully constructed, EQM's firm gathering contracts and firm transmission and storage contracts had weighted average remaining terms of approximately 8 and 15 years, respectively, as of December 31, 2017

Equity and Net Income per Limit

Equity and Net Income per Limited Partner Unit	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Equity and Net Income per Limited Partner Unit	Equity and Net Income per Limited Partner Unit EQGP Equity. As of September 30, 2018 , EQT indirectly held 276,008,766 EQGP common units, representing a 91.3% limited partner interest, and the entire non-economic general partner interest in EQGP. Net Income per Limited Partner Unit. Net income attributable to the May 2018 Acquisition and the EQM-RMP Merger for the periods prior to May 1, 2018 and July 23, 2018, respectively, was not allocated to the limited partners for purposes of calculating net income per limited partner unit as these pre-acquisition amounts were not available to the EQM unitholders. The weighted average phantom unit awards included in the calculation of basic weighted average limited partner units outstanding was 31,602 and 20,750 for the three months ended September 30, 2018 and 2017 , respectively, and 30,142 and 19,706 for the nine months ended September 30, 2018 and 2017 , respectively. EQM Equity. The following table summarizes EQM's limited partner common units and general partner units issued from January 1, 2018 through September 30, 2018 . There were no issuances in 2017 . EQM Limited Partner Common Units EQM General Partner Units Total Balance at January 1, 2018 80,581,758 1,443,015 82,024,773 Common units issued (1) 9,608 — 9,608 May 2018 Acquisition consideration 5,889,282 — 5,889,282 Common units issued with the EQM-RMP Merger 33,975,777 — 33,975,777 Balance at September 30, 2018 120,456,425 1,443,015 121,899,440 (1) Units issued upon a resignation from the EQM General Partner's Board of Directors in February 2018. As of September 30, 2018 , EQGP owned 21,811,643 EQM common units, representing a 17.9% limited partner interest, 1,443,015 EQM general partner units, representing a 1.2% general partner interest, and all of the IDRs in EQM. As of September 30, 2018 , EQT owned 15,433,812 EQM common units, representing a 12.7% limited partner interest in EQM. Distributions The following table summarizes the quarterly cash distributions declared by EQM and EQGP to their respective unitholders from January 1, 2017 through September 30, 2018 . Quarter Ended EQM Distribution per Common Unit EQM Total Distribution EQM Total Distribution to EQGP EQGP Distribution per Common Unit EQGP Total Distribution (Thousands, except per unit amounts) 2017 March 31 $ 0.89 $ 104,238 $ 51,933 $ 0.191 $ 50,838 June 30 0.935 111,455 56,505 0.21 55,895 September 30 0.98 118,673 61,078 0.228 60,686 December 31 1.025 125,890 65,651 0.244 64,944 2018 March 31 $ 1.065 $ 132,321 $ 69,721 $ 0.258 $ 68,671 June 30 1.09 201,809 94,286 0.306 92,552 September 30 (1) 1.115 207,735 97,746 0.315 95,275 (1) On October 23, 2018 , the Board of Directors of the EQM General Partner declared a cash distribution to EQM's unitholders for the third quarter of 2018 of $1.115 per common unit. The cash distribution will be paid on November 14, 2018 to unitholders of record at the close of business on November 2, 2018 . Based on the EQM common units outstanding on October 25, 2018 , cash distributions to EQGP will be approximately $24.3 million related to its limited partner interest, $2.5 million related to its general partner interest and $71.0 million related to its IDRs in EQM. The distribution amounts to EQGP related to its general partner interest and IDRs in EQM are subject to change if EQM issues additional common units on or prior to the record date for the third quarter 2018 distribution. On October 23, 2018 , the Board of Directors of the EQGP General Partner declared a cash distribution to EQGP's unitholders for the third quarter of 2018 of $0.315 per common unit. The cash distribution will be paid on November 23, 2018 to unitholders of record at the close of business on November 2, 2018 .

Financial Information by Busine

Financial Information by Business Segment	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Financial Information by Business Segment	Financial Information by Business Segment Prior to the EQM-RMP Merger , all of EQM's operating activities were conducted through two business segments: Gathering and Transmission. Following the EQM-RMP Merger , EQM adjusted its internal reporting structure to incorporate the newly acquired assets consistent with how EQM's chief operating decision maker reviews its business operations. EQM now conducts its business through three business segments: Gathering, Transmission and Water. Gathering primarily includes high pressure gathering lines and the FERC-regulated low pressure gathering system. Transmission includes EQM's FERC-regulated interstate pipeline and storage business. Water includes water pipelines, impoundment facilities, pumping stations, take point facilities and measurement facilities. EQM has recast the corresponding segment information for the period in which RMP was under the common control of EQT, which began on November 13, 2017. Three Months Ended Nine Months Ended 2018 2017 2018 2017 (Thousands) Revenues from external customers (including affiliates): Gathering $ 252,861 $ 116,522 $ 731,440 $ 330,996 Transmission 89,350 89,771 285,429 272,184 Water 22,373 — 93,438 — Total operating revenues $ 364,584 $ 206,293 $ 1,110,307 $ 603,180 Operating income (loss): Gathering $ 177,902 $ 85,932 $ 510,755 $ 243,061 Transmission 58,691 59,770 198,784 189,237 Water (3,093 ) — 35,627 — Headquarters (2,581 ) (543 ) (5,739 ) (2,344 ) Total operating income $ 230,919 $ 145,159 $ 739,427 $ 429,954 Reconciliation of operating income to net income: Equity income (1) 16,087 6,025 35,836 15,413 Other income 1,345 637 3,193 3,576 Net interest expense 40,966 9,414 76,661 25,994 Net income $ 207,385 $ 142,407 $ 701,795 $ 422,949 (1) Equity income is included in the Transmission segment. September 30, December 31, (Thousands) Segment assets: Gathering $ 6,131,380 $ 5,656,094 Transmission (1) 2,833,519 1,947,566 Water 177,126 208,273 Total operating segments 9,142,025 7,811,933 Headquarters, including cash 126,115 187,701 Total assets $ 9,268,140 $ 7,999,634 (1) The equity investment in the MVP Joint Venture was included in the headquarters segment prior to June 30, 2018. As of June 30, 2018, the investment in the MVP Joint Venture was included in the Transmission segment and the amount at December 31, 2017 has been recast to conform with this presentation. Three Months Ended Nine Months Ended 2018 2017 2018 2017 (Thousands) Depreciation: Gathering $ 25,359 $ 9,983 $ 72,309 $ 28,398 Transmission 12,357 12,261 37,228 35,793 Water 5,851 — 17,420 — Total $ 43,567 $ 22,244 $ 126,957 $ 64,191 Expenditures for segment assets: Gathering $ 194,477 $ 48,182 $ 515,072 $ 150,728 Transmission 37,626 22,312 84,517 73,679 Water 7,981 — 17,358 — Total (1) $ 240,084 $ 70,494 $ 616,947 $ 224,407 (1) EQM accrues capital expenditures when work has been completed but the associated bills have not yet been paid. These accrued amounts are excluded from capital expenditures in the statements of consolidated cash flows until they are paid in a subsequent period. Accrued capital expenditures were approximately $91.3 million , $84.6 million and $90.7 million at September 30, 2018 , June 30, 2018 and December 31, 2017 , respectively. Accrued capital expenditures were approximately $26.5 million , $31.2 million and $26.7 million at September 30, 2017 , June 30, 2017 and December 31, 2016 , respectively.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions In the ordinary course of business, EQGP and EQM engage in transactions with EQT and its affiliates including, but not limited to, gas gathering agreements, transportation service and precedent agreements, storage agreements and water services agreements. EQGP and EQM each have an omnibus agreement with EQT. Pursuant to the omnibus agreements, EQT performs centralized corporate, general and administrative services for EQGP and EQM. In exchange, EQGP and EQM reimburse EQT for the expenses incurred by EQT in providing these services. EQM's omnibus agreement also provides for certain indemnification obligations between EQM and EQT. Pursuant to a secondment agreement, employees of EQT and its affiliates may be seconded to EQM to provide operating and other services with respect to EQM's business under the direction, supervision and control of EQM. EQM reimburses EQT and its affiliates for the services provided by the seconded employees. The expenses for which EQGP and EQM reimburse EQT and its affiliates may not necessarily reflect the actual expenses that EQGP and EQM would incur on a stand-alone basis. EQGP and EQM are unable to estimate what those expenses would be on a stand-alone basis. In connection with the completion of the Rice Merger, RMP, EQT and other affiliates entered into an amended and restated omnibus agreement (the Amended RMP Omnibus Agreement). Pursuant to the Amended RMP Omnibus Agreement, EQT performed centralized corporate general and administrative services for RMP. In exchange, RMP reimbursed EQT for the expenses incurred by EQT in providing these services. Following the completion of the EQM-RMP Merger, RMP reimburses EQT for the expenses incurred by EQT providing services to RMP and its subsidiaries under the EQM Omnibus Agreement. The Amended RMP Omnibus Agreement continues in existence for purposes of certain indemnification obligations that survived the merger.

Investment in Unconsolidated En

Investment in Unconsolidated Entity	9 Months Ended
	Sep. 30, 2018
Equity Method Investments and Joint Ventures [Abstract]
Investment in Unconsolidated Entity	Investment in Unconsolidated Entity The MVP Joint Venture is constructing the Mountain Valley Pipeline (MVP), an estimated 300 -mile natural gas interstate pipeline spanning from northern West Virginia to southern Virginia. EQM is the operator of the MVP and owned a 45.5% interest in the MVP Joint Venture as of September 30, 2018 . The MVP Joint Venture is a variable interest entity because it has insufficient equity to finance its activities during the construction stage of the project. EQM is not the primary beneficiary because it does not have the power to direct the activities of the MVP Joint Venture that most significantly impact its economic performance. Certain business decisions require the approval of owners holding more than a 66 2/3% interest in the MVP Joint Venture and no one member owns more than a 66 2/3% interest. The MVP Joint Venture is an equity method investment for accounting purposes as EQM has the ability to exercise significant influence over operating and financial policies of the MVP Joint Venture. In April 2018, the MVP Joint Venture announced the MVP Southgate project, a proposed 70 -mile interstate pipeline that will extend from the MVP at Pittsylvania County, Virginia to new delivery points in Rockingham and Alamance Counties, North Carolina. As of September 30, 2018 , EQM had a 32.7% ownership interest in the MVP Southgate project and will operate the pipeline. In September 2018 , the MVP Joint Venture issued a capital call notice to MVP Holdco, LLC (MVP Holdco), a direct wholly owned subsidiary of EQM, for $456.0 million , of which $175.2 million was paid as of October 2018 , and $280.8 million is expected to be paid in the fourth quarter of 2018. In addition, in September 2018, the MVP Joint Venture issued a capital call notice to MVP Holdco for $7.7 million for funding of the MVP Southgate project that is expected to be paid in the fourth quarter of 2018. The capital contribution payables have been reflected on the consolidated balance sheet as of September 30, 2018 with corresponding increases to EQM's investment in the MVP Joint Venture. Equity income is EQM's portion of the MVP Joint Venture's AFUDC on construction of the MVP. As of September 30, 2018 , EQM had issued a $91 million performance guarantee in favor of the MVP Joint Venture. The guarantee provides performance assurances of MVP Holdco's obligations to fund its proportionate share of the MVP construction budget. As of September 30, 2018 , EQM's maximum financial statement exposure related to the MVP Joint Venture was approximately $1,391 million , which consists of the investment in unconsolidated entity balance on the consolidated balance sheet as of September 30, 2018 and amounts that could have become due under EQM's performance guarantee as of that date. The following tables summarize the unaudited condensed financial statements for the MVP Joint Venture. Condensed Consolidated Balance Sheets September 30, December 31, (Thousands) Current assets $ 1,260,789 $ 330,271 Noncurrent assets 2,330,467 747,728 Total assets $ 3,591,256 $ 1,077,999 Current liabilities $ 726,528 $ 65,811 Equity 2,864,728 1,012,188 Total liabilities and equity $ 3,591,256 $ 1,077,999 Condensed Statements of Consolidated Operations Three Months Ended Nine Months Ended 2018 2017 2018 2017 (Thousands) Net interest income $ 11,958 $ 3,227 $ 25,873 $ 8,205 AFUDC - equity 23,417 10,055 52,906 25,710 Net income $ 35,375 $ 13,282 $ 78,779 $ 33,915

Debt

Debt	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Debt	Debt EQGP Working Capital Facility. EQGP has a Working Capital Loan Agreement with EQT (the Working Capital Facility) that provides for interest bearing loans of up to $50 million outstanding at any one time. EQGP had approximately $0.2 million of borrowings outstanding under the Working Capital Facility as of September 30, 2018 and December 31, 2017 , which were included in due to related party on the consolidated balance sheets. The maximum amounts of EQGP's outstanding borrowings under the Working Capital Facility was $0.2 million and $0.3 million during the nine months ended September 30, 2018 and 2017 , respectively, and interest was incurred at weighted average annual interest rates of approximately 3.3% and 2.4% , respectively. EQGP expects the Working Capital Facility to be terminated at or prior to the proposed separation of EQT's production and midstream businesses (the Separation). EQM $1 Billion Facility. EQM has a $1 billion credit facility that expires in July 2022. The $1 Billion Facility is available to fund working capital requirements and capital expenditures, to purchase assets, to pay distributions and repurchase units and for general partnership purposes (including purchasing assets from EQT and other third parties). EQM's $1 Billion Facility contains various provisions that, if violated, could result in termination of the credit facility, require early payment of amounts outstanding or similar actions. The most significant covenants and events of default relate to maintenance of a permitted leverage ratio, limitations on transactions with affiliates, limitations on restricted payments, insolvency events, nonpayment of scheduled principal or interest payments, acceleration of and certain other defaults under other financial obligations and change of control provisions. Under the $1 Billion Facility, EQM is required to maintain a consolidated leverage ratio of not more than 5.00 to 1.00 (or not more than 5.50 to 1.00 for certain measurement periods following the consummation of certain acquisitions). EQM had $22 million in borrowings and $1 million of letters of credit outstanding under its credit facility as of September 30, 2018 . EQM had $180 million in borrowings and no letters of credit outstanding under its credit facility as of December 31, 2017 . During the three and nine months ended September 30, 2018 , the maximum amount of EQM's outstanding borrowings under the credit facility at any time was $74 million and $420 million , respectively, and the average daily balance was approximately $22 million and $147 million , respectively. EQM incurred interest at weighted average annual interest rates of approximately 3.7% and 3.2% for the three and nine months ended September 30, 2018 , respectively. During the three and nine months ended September 30, 2017 , the maximum amount of EQM's outstanding borrowings under the credit facility at any time was $177 million and the average daily balances were approximately $95 million and $32 million , respectively. Interest was incurred at a weighted average annual interest rate of approximately 2.7% for the three and nine months ended September 30, 2017 . Prior to the Separation, EQM intends to increase its borrowing capacity from $1 billion up to $3 billion . EQM 364 -Day Facility. EQM has a $500 million , 364 -day, uncommitted revolving loan agreement with EQT. Interest accrues on outstanding borrowings at an interest rate equal to the rate then applicable to similar loans under the $1 Billion Facility, or a successor revolving credit facility, less the sum of (i) the then applicable commitment fee under the $1 Billion Facility and (ii) 10 basis points. EQM had no borrowings outstanding on the 364 -Day Facility as of September 30, 2018 and December 31, 2017 . There were no borrowings outstanding at any time during the three and nine months ended September 30, 2018 . During the three and nine months ended September 30, 2017 , the maximum amount of EQM's outstanding borrowings under the credit facility at any time was $40 million and $100 million , respectively, and the average daily balances were approximately $11 million and $30 million , respectively. EQM incurred interest at weighted average annual interest rates of approximately 2.4% and 2.2% for the three and nine months ended September 30, 2017 , respectively. EQM expects EQT to terminate the 364 -Day Facility at or prior to the Separation. EQM Term Loan Facility. On April 25, 2018, EQM entered into a $2.5 billion unsecured multi-draw 364 -day term loan facility with a syndicate of lenders. The EQM Term Loan Facility was used to fund the cash consideration for the May 2018 Acquisition , to repay borrowings under EQM's $1 Billion Facility and for other general partnership purposes. During the second quarter 2018, the balance outstanding under the EQM Term Loan Facility was repaid, and the EQM Term Loan Facility was terminated on June 25, 2018 in connection with EQM's issuance of the 2018 Senior Notes (defined below). As a result of the termination, EQM expensed $3 million of deferred issuance costs. From April 25, 2018 through June 25, 2018, the maximum amount of EQM's outstanding borrowings under the EQM Term Loan Facility at any time was $1,825 million and the average daily balance was approximately $1,231 million . EQM incurred interest at a weighted average annual interest rate of approximately 3.3% for the period from April 25, 2018 through June 25, 2018. RMP $850 Million Facility. RM Operating LLC (formerly known as R ice Midstream OpCo LLC) (Rice Midstream OpCo), a wholly owned subsidiary of RMP, had an $850 million credit facility. The RMP $850 Million Facility was available for general partnership purposes, including to purchase assets, and to fund working capital requirements and capital expenditures, pay dividends and repurchase units. The RMP $850 Million Facility was secured by mortgages and other security interests on substantially all of RMP's properties and was guaranteed by RMP and its restricted subsidiaries. As of December 31, 2017, Rice Midstream OpCo had $286 million of borrowings and $1 million of letters of credit outstanding under the RMP $850 Million Facility . For the periods from July 1, 2018 through July 23, 2018 and from January 1, 2018 through July 23, 2018, the maximum amounts of RMP's outstanding borrowings under the RMP $850 Million Facility at any time were $260 million and $375 million , respectively, and the average daily outstanding balances under the RMP $850 Million Facility were approximately $249 million and $300 million , respectively. Interest was incurred on the RMP $850 Million Facility at weighted average annual interest rates of 4.1% and 3.8% for the periods from July 1, 2018 through July 23, 2018 and from January 1, 2018 through July 23, 2018, respectively. In connection with the completion of the EQM-RMP Merger, on July 23, 2018, EQM repaid the approximately $260 million of borrowings outstanding under the RMP $850 Million Facility and the RMP $850 Million Facility was terminated. 2018 Senior Notes. During the second quarter of 2018, EQM issued 4.75% senior notes due July 15, 2023 in the aggregate principal amount of $1.1 billion , 5.50% senior notes due July 15, 2028 in the aggregate principal amount of $850 million and 6.50% senior notes due July 15, 2048 in the aggregate principal amount of $550 million (collectively, the 2018 Senior Notes). EQM received net proceeds from the offering of approximately $2,465.8 million , inclusive of a discount of $11.8 million and estimated debt issuance costs of $22.4 million . The net proceeds were used to repay the balances outstanding under the EQM Term Loan Facility and the RMP $850 Million Facility, and the remainder is expected to be used for general partnership purposes. The 2018 Senior Notes were issued pursuant to new supplemental indentures to EQM's existing indenture dated August 1, 2014. The 2018 Senior Notes contain covenants that limit EQM's ability to, among other things, incur certain liens securing indebtedness, engage in certain sale and leaseback transactions, and enter into certain consolidations, mergers, conveyances, transfers or leases of all or substantially all of the EQM's assets. As of September 30, 2018 , EQGP and EQM were in compliance with all debt provisions and covenants.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The carrying values of cash and cash equivalents, accounts receivable, amounts due to/from related parties and accounts payable approximate fair value due to the short maturity of the instruments; these are considered Level 1 fair value measurements. The carrying value of the credit facility borrowings approximates fair value as the interest rates are based on prevailing market rates; this is considered a Level 1 fair value measurement. As EQM's senior notes are not actively traded, their fair values are considered Level 2 fair value measurements and are estimated using a standard industry income approach model that applies a discount rate based on market rates for debt with similar remaining time to maturity and credit risk. As of September 30, 2018 and December 31, 2017 , the estimated fair value of EQM's senior notes was approximately $3,532 million and $1,006 million , respectively, and the carrying value of EQM's senior notes was approximately $3,455 million and $987 million , respectively. The fair value of the Preferred Interest is a Level 3 fair value measurement and is estimated using an income approach model that applies a market-based discount rate. As of September 30, 2018 and December 31, 2017 , the estimated fair value of the Preferred Interest was approximately $122 million and $133 million , respectively, and the carrying value of the Preferred Interest was approximately $116 million and $119 million , respectively.

Distributions

Distributions	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Distributions	Equity and Net Income per Limited Partner Unit EQGP Equity. As of September 30, 2018 , EQT indirectly held 276,008,766 EQGP common units, representing a 91.3% limited partner interest, and the entire non-economic general partner interest in EQGP. Net Income per Limited Partner Unit. Net income attributable to the May 2018 Acquisition and the EQM-RMP Merger for the periods prior to May 1, 2018 and July 23, 2018, respectively, was not allocated to the limited partners for purposes of calculating net income per limited partner unit as these pre-acquisition amounts were not available to the EQM unitholders. The weighted average phantom unit awards included in the calculation of basic weighted average limited partner units outstanding was 31,602 and 20,750 for the three months ended September 30, 2018 and 2017 , respectively, and 30,142 and 19,706 for the nine months ended September 30, 2018 and 2017 , respectively. EQM Equity. The following table summarizes EQM's limited partner common units and general partner units issued from January 1, 2018 through September 30, 2018 . There were no issuances in 2017 . EQM Limited Partner Common Units EQM General Partner Units Total Balance at January 1, 2018 80,581,758 1,443,015 82,024,773 Common units issued (1) 9,608 — 9,608 May 2018 Acquisition consideration 5,889,282 — 5,889,282 Common units issued with the EQM-RMP Merger 33,975,777 — 33,975,777 Balance at September 30, 2018 120,456,425 1,443,015 121,899,440 (1) Units issued upon a resignation from the EQM General Partner's Board of Directors in February 2018. As of September 30, 2018 , EQGP owned 21,811,643 EQM common units, representing a 17.9% limited partner interest, 1,443,015 EQM general partner units, representing a 1.2% general partner interest, and all of the IDRs in EQM. As of September 30, 2018 , EQT owned 15,433,812 EQM common units, representing a 12.7% limited partner interest in EQM. Distributions The following table summarizes the quarterly cash distributions declared by EQM and EQGP to their respective unitholders from January 1, 2017 through September 30, 2018 . Quarter Ended EQM Distribution per Common Unit EQM Total Distribution EQM Total Distribution to EQGP EQGP Distribution per Common Unit EQGP Total Distribution (Thousands, except per unit amounts) 2017 March 31 $ 0.89 $ 104,238 $ 51,933 $ 0.191 $ 50,838 June 30 0.935 111,455 56,505 0.21 55,895 September 30 0.98 118,673 61,078 0.228 60,686 December 31 1.025 125,890 65,651 0.244 64,944 2018 March 31 $ 1.065 $ 132,321 $ 69,721 $ 0.258 $ 68,671 June 30 1.09 201,809 94,286 0.306 92,552 September 30 (1) 1.115 207,735 97,746 0.315 95,275 (1) On October 23, 2018 , the Board of Directors of the EQM General Partner declared a cash distribution to EQM's unitholders for the third quarter of 2018 of $1.115 per common unit. The cash distribution will be paid on November 14, 2018 to unitholders of record at the close of business on November 2, 2018 . Based on the EQM common units outstanding on October 25, 2018 , cash distributions to EQGP will be approximately $24.3 million related to its limited partner interest, $2.5 million related to its general partner interest and $71.0 million related to its IDRs in EQM. The distribution amounts to EQGP related to its general partner interest and IDRs in EQM are subject to change if EQM issues additional common units on or prior to the record date for the third quarter 2018 distribution. On October 23, 2018 , the Board of Directors of the EQGP General Partner declared a cash distribution to EQGP's unitholders for the third quarter of 2018 of $0.315 per common unit. The cash distribution will be paid on November 23, 2018 to unitholders of record at the close of business on November 2, 2018 .

Consolidated Variable Interest

Consolidated Variable Interest Entity	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidated Variable Interest Entity	Consolidated Variable Interest Entity EQM is a variable interest entity. Through EQGP's ownership and control of the EQM General Partner, EQGP has the power to direct the activities that most significantly impact EQM's economic performance. In addition, through EQGP's general partner interest, IDRs and limited partner interest in EQM, EQGP has the obligation to absorb EQM's losses and the right to receive benefits from EQM in accordance with its general partner and limited partner ownership percentages and IDRs. Therefore, EQGP consolidates EQM. For additional information, see Note 15 to the consolidated financial statements in EQGP's Annual Report on Form 10-K for the year ended December 31, 2017 . EQGP's only cash-generating assets consist of its partnership interests in EQM. As a result, EQGP's results of operations do not differ materially from the results of operations of EQM. For a discussion on the risks associated with EQM's operations, see EQGP's Annual Report on Form 10-K for the year ended December 31, 2017 and this Quarterly Report on Form 10-Q. For further discussion on the effect that EQGP's involvement in EQM has on EQGP's financial position, results of operations and cash flows, see EQGP's Annual Report on Form 10-K for the year ended December 31, 2017 . For discussion on related party transactions, see Note 5 to the consolidated financial statements in EQGP's Annual Report on Form 10-K for the year ended December 31, 2017 and Note F to these consolidated financial statements. The following table presents amounts included in EQGP's consolidated balance sheets that were for the use or obligation of EQM. Classification September 30, 2018 December 31, 2017 (Thousands) Assets: Cash and cash equivalents $ 4,712 $ 2,557 Accounts receivable 58,358 28,804 Accounts receivable – affiliate 167,481 103,304 Other current assets 9,080 12,662 Net property, plant and equipment 5,608,358 2,804,059 Investment in unconsolidated entity 1,300,430 460,546 Goodwill 1,384,872 — Intangible assets, net 586,500 — Other assets 146,400 136,895 Liabilities: Accounts payable $ 134,026 $ 47,040 Due to related party 39,709 31,673 Capital contribution payable to MVP Joint Venture 463,733 105,734 Accrued interest 46,165 10,926 Accrued liabilities 16,401 16,871 Credit facility borrowings of EQM and RMP 22,000 180,000 EQM senior notes 3,455,296 987,352 Regulatory and other long-term liabilities 31,010 20,273

Financial Statements (Policies)

Financial Statements (Policies)	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Basis of Presentation	Organization and Basis of Presentation EQGP owns EQT's partnership interests in EQM, a growth-oriented Delaware limited partnership. EQM Midstream Services, LLC (formerly known as EQT Midstream Services, LLC) (EQM General Partner), is a direct wholly owned subsidiary of EQGP and is the general partner of EQM. EQGP Services, LLC (formerly known as EQT GP Services, LLC) (EQGP General Partner), is an indirect wholly owned subsidiary of EQT and is the general partner of EQGP. EQGP was formed under the name EQT GP Holdings, LP and changed its name to EQGP Holdings, LP in October 2018. EQGP has no independent operations or material assets other than its partnership interests in EQM (see Note K). EQGP's financial statements differ from those of EQM primarily as a result of noncontrolling interest ownership attributable to the publicly held limited partner interests in EQM and additional expenses incurred by EQGP, which include selling, general and administrative expenses and net interest expense or income. The accompanying unaudited consolidated financial statements have been prepared in accordance with GAAP for interim financial information and with the requirements of Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, these unaudited consolidated financial statements include all adjustments (consisting of only normal recurring adjustments, unless otherwise disclosed in this Form 10-Q) necessary for a fair presentation of the financial position of EQGP as of September 30, 2018 and December 31, 2017 , the results of its operations for the three and nine months ended September 30, 2018 and 2017 , and its cash flows and equity for the nine months ended September 30, 2018 and 2017 . Certain previously reported amounts have been reclassified to conform to the current year presentation. The balance sheet at December 31, 2017 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by GAAP for complete financial statements. EQGP's consolidated financial statements have been retrospectively recast to include the pre-acquisition results of the May 2018 Acquisition and the EQM-RMP Merger because these transactions were between entities under common control. The recast is for the period the acquired businesses were under the common control of EQT, which began on November 13, 2017 as a result of EQT's merger with Rice Energy Inc. (Rice) (the Rice Merger). EQM recorded the assets and liabilities acquired in the May 2018 Acquisition and the EQM-RMP Merger at their carrying amounts to EQT on the effective dates of the transactions. The consolidated financial statements are not necessarily indicative of the actual results of operations if EQM and the assets acquired in the May 2018 Acquisition and the EQM-RMP Merger had been operated together during the pre-acquisition periods. Due to the seasonal nature of EQM's utility customer contracts, the interim statements for the three and nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018 . For further information, refer to the consolidated financial statements and related footnotes and "Management's Discussion and Analysis of Financial Condition and Results of Operations" included in EQGP's Annual Report on Form 10-K for the year ended December 31, 2017 .
Recently Issued Accounting Standards	Recently Issued Accounting Standards In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers . The standard requires an entity to recognize revenue in a manner that depicts the transfer of goods or services to customers at an amount that reflects the consideration the entity expects in exchange for those goods or services. EQGP adopted this standard on January 1, 2018 using the modified retrospective method of adoption. Adoption of the ASU did not require an adjustment to the opening balance of equity. EQGP does not expect the standard to have a significant effect on its results of operations, liquidity or financial position. EQGP implemented processes and controls to ensure new contracts are reviewed for the appropriate accounting treatment and to generate the disclosures required under the new standard in the first quarter of 2018. For the disclosures required by this ASU, see Note C. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments-Overall: Recognition and Measurement of Financial Assets and Financial Liabilities . The standard primarily affects accounting for equity investments, financial liabilities under the fair value option, the presentation and disclosure requirements for financial instruments and eliminates the cost method of accounting for equity investments. EQGP adopted this standard in the first quarter of 2018 with no significant effect on its financial statements or related disclosures. In February 2016, the FASB issued ASU No. 2016-02, Leases . The standard requires an entity to record assets and obligations for contracts currently recognized as operating leases. In July 2018, the FASB also targeted improvements to this ASU in ASU 2018-11. This update provides entities with an optional transition method, which permits an entity to initially apply the new leases standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. EQGP has elected to utilize the optional transition method. The ASU will be effective for annual reporting periods beginning after December 15, 2018, including interim periods within that reporting period, with early adoption permitted. EQGP is utilizing a lease accounting system to document its current population of contracts classified as leases, which will be updated as EQGP's lease population changes. EQGP continues to evaluate new business processes and related internal controls and is assessing and documenting the accounting impacts related to the new standard. Although the evaluation is ongoing, EQGP expects that the adoption will impact its financial statements as the standard requires recognition on the balance sheet of a right of use asset and corresponding lease liability. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses: Measurement of Credit Losses on Financial Instruments. This ASU amends guidance on reporting credit losses for assets held at amortized cost basis and available for sale debt securities. For assets held at amortized cost basis, this ASU eliminates the probable initial recognition threshold in current GAAP and requires an entity to reflect its current estimate of all expected credit losses. The amendments affect loans, debt securities, trade receivables, net investments in leases, off balance sheet credit exposures, reinsurance receivables, and any other financial assets not excluded from the scope that have the contractual right to receive cash. The ASU will be effective for annual reporting periods beginning after December 15, 2019, including interim periods within that reporting period. EQGP is currently evaluating the effect this standard will have on its financial statements and related disclosures. In January 2017, the FASB issued ASU 2017-04, Simplifying the Test of Goodwill Impairment . ASU 2017-04 simplifies the quantitative goodwill impairment test requirements by eliminating the requirement to calculate the implied fair value of goodwill. Instead, a company would record an impairment charge based on the excess of a reporting unit’s carrying value over its fair value. The standard’s provisions are to be applied prospectively. EQGP adopted this standard in the first quarter of 2018 with no significant effect on its financial statements or related disclosures. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement, Changes to the Disclosure Requirements for Fair Value Measurement , which makes a number of changes to the hierarchy associated with Level 1, 2 and 3 fair value measurements and the related disclosure requirements. This guidance is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. EQGP is currently evaluating the effect this standard will have on its financial statements and related disclosures but does not expect the adoption of this standard to have a material impact on its financial statements and related disclosures.

Acquisitions and Merger (Tables

Acquisitions and Merger (Tables)	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Schedule Fair Value of Assets Acquired and Liabilities Assumed	The following table summarizes the allocation of the fair value of the assets and liabilities of RMP, ROM, Strike Force and Rice WV as of November 13, 2017 through pushdown accounting from EQT. The preliminary allocation to certain assets and/or liabilities may be adjusted by material amounts as EQT continues to finalize the fair value estimates. At November 13, 2017 (Thousands) Estimated fair value of RMP, ROM, Strike Force and Rice WV (1) $ 4,014,984 Estimated Fair Value of Assets Acquired and Liabilities Assumed: Current assets (2) 132,459 Intangible assets (3) 623,200 Property and equipment, net (4) 2,265,900 Other non-current assets 118 Current liabilities (2) (116,242 ) RMP $850 Million Facility (5) (266,000 ) Other non-current liabilities (5) (9,323 ) Total estimated fair value of assets acquired and liabilities assumed 2,630,112 Goodwill $ 1,384,872 (1) Includes the estimated fair value attributable to noncontrolling interest of $166 million . (2) The fair value of current assets and current liabilities were assumed to approximate their carrying values. (3) The identifiable intangible assets for customer relationships were estimated by applying a discounted cash flow approach which was adjusted for customer attrition assumptions and projected market conditions. (4) The estimated fair value of long-lived property and equipment were determined utilizing estimated replacement cost adjusted for a usage or obsolescence factor. (5) The estimated fair value of long-term liabilities was determined utilizing observable market inputs where available or estimated based on their then current carrying values.
Schedule of Change in Asset Retirement Obligation	The following table presents a reconciliation of the AROs for the periods from November 13, 2017 through September 30, 2018. Asset Retirement Obligations (Thousands) Balance at November 13, 2017 $ 9,286 Accretion expense 35 Balance at December 31, 2017 $ 9,321 Accretion expense 321 Balance at September 30, 2018 $ 9,642

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregated Revenue Information, by Business Segment	The tables below provide disaggregated revenue information by EQM business segment. Three Months Ended September 30, 2018 Gathering Transmission Water Total (Thousands) Firm reservation fee revenues $ 112,598 $ 82,669 $ — $ 195,267 Volumetric based fee revenues: Usage fees under firm contracts (1) 8,661 5,331 — 13,992 Usage fees under interruptible contracts (2) 131,602 1,350 — 132,952 Total volumetric based fee revenues 140,263 6,681 — 146,944 Water service revenues — — 22,373 22,373 Total operating revenues $ 252,861 $ 89,350 $ 22,373 $ 364,584 Nine Months Ended September 30, 2018 Gathering Transmission Water Total (Thousands) Firm reservation fee revenues $ 334,233 $ 262,666 $ — $ 596,899 Volumetric based fee revenues: Usage fees under firm contracts (1) 30,725 13,981 — 44,706 Usage fees under interruptible contracts (2) 366,482 8,782 — 375,264 Total volumetric based fee revenues 397,207 22,763 — 419,970 Water service revenues — — 93,438 93,438 Total operating revenues $ 731,440 $ 285,429 $ 93,438 $ 1,110,307 (1) Includes fees on volumes gathered and transported in excess of firm contracted capacity as well as usage fees and fees on all volumes transported under firm contracts. (2) Includes volumes from contracts under which EQM has agreed to hold capacity available without charging a capacity reservation fee.
Summary of Remaining Performance Obligations	The following table summarizes the transaction price allocated to EQM's remaining performance obligations under all contracts with firm reservation fees and MVCs as of September 30, 2018 . 2018 (1) 2019 2020 2021 2022 Thereafter Total (Thousands) Gathering firm reservation fees $ 113,018 $ 476,270 $ 552,197 $ 562,196 $ 562,196 $ 2,834,111 $ 5,099,988 Gathering revenues supported by MVCs — 65,700 71,370 71,175 71,175 136,875 416,295 Transmission firm reservation fees 94,077 346,893 344,328 339,588 334,522 2,477,808 3,937,216 Total $ 207,095 $ 888,863 $ 967,895 $ 972,959 $ 967,893 $ 5,448,794 $ 9,453,499 (1) October 1 through December 31

Equity and Net Income per Lim_2

Equity and Net Income per Limited Partner Unit (Tables)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Summary of Units Issued	The following table summarizes EQM's limited partner common units and general partner units issued from January 1, 2018 through September 30, 2018 . There were no issuances in 2017 . EQM Limited Partner Common Units EQM General Partner Units Total Balance at January 1, 2018 80,581,758 1,443,015 82,024,773 Common units issued (1) 9,608 — 9,608 May 2018 Acquisition consideration 5,889,282 — 5,889,282 Common units issued with the EQM-RMP Merger 33,975,777 — 33,975,777 Balance at September 30, 2018 120,456,425 1,443,015 121,899,440 (1) Units issued upon a resignation from the EQM General Partner's Board of Directors in February 2018.

Financial Information by Busi_2

Financial Information by Business Segment (Tables)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Schedule of Revenue from External Customers and Operating Income and Reconciliation to Net Income	Three Months Ended Nine Months Ended 2018 2017 2018 2017 (Thousands) Revenues from external customers (including affiliates): Gathering $ 252,861 $ 116,522 $ 731,440 $ 330,996 Transmission 89,350 89,771 285,429 272,184 Water 22,373 — 93,438 — Total operating revenues $ 364,584 $ 206,293 $ 1,110,307 $ 603,180 Operating income (loss): Gathering $ 177,902 $ 85,932 $ 510,755 $ 243,061 Transmission 58,691 59,770 198,784 189,237 Water (3,093 ) — 35,627 — Headquarters (2,581 ) (543 ) (5,739 ) (2,344 ) Total operating income $ 230,919 $ 145,159 $ 739,427 $ 429,954 Reconciliation of operating income to net income: Equity income (1) 16,087 6,025 35,836 15,413 Other income 1,345 637 3,193 3,576 Net interest expense 40,966 9,414 76,661 25,994 Net income $ 207,385 $ 142,407 $ 701,795 $ 422,949 (1) Equity income is included in the Transmission segment.
Schedule of Segment Assets	September 30, December 31, (Thousands) Segment assets: Gathering $ 6,131,380 $ 5,656,094 Transmission (1) 2,833,519 1,947,566 Water 177,126 208,273 Total operating segments 9,142,025 7,811,933 Headquarters, including cash 126,115 187,701 Total assets $ 9,268,140 $ 7,999,634 (1) The equity investment in the MVP Joint Venture was included in the headquarters segment prior to June 30, 2018. As of June 30, 2018, the investment in the MVP Joint Venture was included in the Transmission segment and the amount at December 31, 2017 has been recast to conform with this presentation.
Schedule of Depreciation and Amortization and Expenditures for Segment Assets	Three Months Ended Nine Months Ended 2018 2017 2018 2017 (Thousands) Depreciation: Gathering $ 25,359 $ 9,983 $ 72,309 $ 28,398 Transmission 12,357 12,261 37,228 35,793 Water 5,851 — 17,420 — Total $ 43,567 $ 22,244 $ 126,957 $ 64,191 Expenditures for segment assets: Gathering $ 194,477 $ 48,182 $ 515,072 $ 150,728 Transmission 37,626 22,312 84,517 73,679 Water 7,981 — 17,358 — Total (1) $ 240,084 $ 70,494 $ 616,947 $ 224,407 (1) EQM accrues capital expenditures when work has been completed but the associated bills have not yet been paid. These accrued amounts are excluded from capital expenditures in the statements of consolidated cash flows until they are paid in a subsequent period. Accrued capital expenditures were approximately $91.3 million , $84.6 million and $90.7 million at September 30, 2018 , June 30, 2018 and December 31, 2017 , respectively. Accrued capital expenditures were approximately $26.5 million , $31.2 million and $26.7 million at September 30, 2017 , June 30, 2017 and December 31, 2016 , respectively.

Investment in Unconsolidated _2

Investment in Unconsolidated Entity (Tables)	9 Months Ended
	Sep. 30, 2018
Equity Method Investments and Joint Ventures [Abstract]
Schedule of Unaudited Condensed Financial Statements for the Investment in Unconsolidated Equity	The following tables summarize the unaudited condensed financial statements for the MVP Joint Venture. Condensed Consolidated Balance Sheets September 30, December 31, (Thousands) Current assets $ 1,260,789 $ 330,271 Noncurrent assets 2,330,467 747,728 Total assets $ 3,591,256 $ 1,077,999 Current liabilities $ 726,528 $ 65,811 Equity 2,864,728 1,012,188 Total liabilities and equity $ 3,591,256 $ 1,077,999 Condensed Statements of Consolidated Operations Three Months Ended Nine Months Ended 2018 2017 2018 2017 (Thousands) Net interest income $ 11,958 $ 3,227 $ 25,873 $ 8,205 AFUDC - equity 23,417 10,055 52,906 25,710 Net income $ 35,375 $ 13,282 $ 78,779 $ 33,915

Distributions (Tables)

Distributions (Tables)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Summary of Cash Distributions to Unitholders	The following table summarizes the quarterly cash distributions declared by EQM and EQGP to their respective unitholders from January 1, 2017 through September 30, 2018 . Quarter Ended EQM Distribution per Common Unit EQM Total Distribution EQM Total Distribution to EQGP EQGP Distribution per Common Unit EQGP Total Distribution (Thousands, except per unit amounts) 2017 March 31 $ 0.89 $ 104,238 $ 51,933 $ 0.191 $ 50,838 June 30 0.935 111,455 56,505 0.21 55,895 September 30 0.98 118,673 61,078 0.228 60,686 December 31 1.025 125,890 65,651 0.244 64,944 2018 March 31 $ 1.065 $ 132,321 $ 69,721 $ 0.258 $ 68,671 June 30 1.09 201,809 94,286 0.306 92,552 September 30 (1) 1.115 207,735 97,746 0.315 95,275 (1) On October 23, 2018 , the Board of Directors of the EQM General Partner declared a cash distribution to EQM's unitholders for the third quarter of 2018 of $1.115 per common unit. The cash distribution will be paid on November 14, 2018 to unitholders of record at the close of business on November 2, 2018 . Based on the EQM common units outstanding on October 25, 2018 , cash distributions to EQGP will be approximately $24.3 million related to its limited partner interest, $2.5 million related to its general partner interest and $71.0 million related to its IDRs in EQM. The distribution amounts to EQGP related to its general partner interest and IDRs in EQM are subject to change if EQM issues additional common units on or prior to the record date for the third quarter 2018 distribution.

Consolidated Variable Interes_2

Consolidated Variable Interest Entity (Tables)	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Consolidated Variable Interest Entity	The following table presents amounts included in EQGP's consolidated balance sheets that were for the use or obligation of EQM. Classification September 30, 2018 December 31, 2017 (Thousands) Assets: Cash and cash equivalents $ 4,712 $ 2,557 Accounts receivable 58,358 28,804 Accounts receivable – affiliate 167,481 103,304 Other current assets 9,080 12,662 Net property, plant and equipment 5,608,358 2,804,059 Investment in unconsolidated entity 1,300,430 460,546 Goodwill 1,384,872 — Intangible assets, net 586,500 — Other assets 146,400 136,895 Liabilities: Accounts payable $ 134,026 $ 47,040 Due to related party 39,709 31,673 Capital contribution payable to MVP Joint Venture 463,733 105,734 Accrued interest 46,165 10,926 Accrued liabilities 16,401 16,871 Credit facility borrowings of EQM and RMP 22,000 180,000 EQM senior notes 3,455,296 987,352 Regulatory and other long-term liabilities 31,010 20,273

Acquisitions and Merger - Narra

Acquisitions and Merger - Narrative (Details)

Jul. 23, 2018shares

May 22, 2018USD ($)shares

May 01, 2018USD ($)shares

Apr. 25, 2018shares

Nov. 13, 2017USD ($)

Sep. 30, 2018USD ($)

Sep. 30, 2017USD ($)

Sep. 30, 2018USD ($)

Sep. 30, 2017USD ($)

Dec. 31, 2017USD ($)

Business Acquisition [Line Items]

Goodwill

[1]

$ 1,384,872,000

$ 1,384,872,000

$ 1,384,872,000

Amortization of intangible assets

[2]

10,387,000

$ 0

31,160,000

[1]

$ 0

[1]

May 2018 Acquisition

Business Acquisition [Line Items]

Estimated annual amortization expense, 2019

41,500,000

41,500,000

Estimated annual amortization expense, 2022

41,500,000

41,500,000

Estimated annual amortization expense, 2021

41,500,000

41,500,000

Estimated annual amortization expense, 2020

41,500,000

41,500,000

IDR Transaction

Business Acquisition [Line Items]

Equity interest issued or issuable (in shares) | shares

36,293,766

Investment in RMP IDRs

$ 865,000,000

EQM | Strike Force Midstream

Business Acquisition [Line Items]

Limited partner ownership interest (as a percent)

100.00%

EQM | May 2018 Acquisition

Business Acquisition [Line Items]

Equity interest issued or issuable (in shares) | shares

5,889,282

Payments to acquire businesses, gross

$ 1,150,000,000

Amortization of intangible assets

$ 0

EQM | EQM-RMP Merger

Business Acquisition [Line Items]

Goodwill

$ 1,384,872,000

Intangible assets recognized

$ 623,200,000

Weighted average useful life

15 years

Amortization of intangible assets

10,400,000

$ 0

31,200,000

Accumulated amortization

36,700,000

36,700,000

$ 5,500,000

Estimated annual amortization expense, current

$ 41,500,000

$ 41,500,000

Consideration transferred

$ 4,014,984,000

EQM | Gulfport Energy Corporation

Business Acquisition [Line Items]

Percentage of voting interests acquired

25.00%

Consideration transferred

$ 175,000,000

Strike Force Midstream Holdings LLC | May 2018 Acquisition | Strike Force Midstream

Business Acquisition [Line Items]

Limited partner ownership interest (as a percent)

75.00%

Rice Midstream Partners, LP | EQM-RMP Merger

Business Acquisition [Line Items]

Equity interest issued or issuable (in shares) | shares

34,000,000

Common share conversion ratio

0.3319

EQT Corporation and Subsidiaries | EQM-RMP Merger | EQM

Business Acquisition [Line Items]

Equity interest issued or issuable (in shares) | shares

9,544,530

[1]

As discussed in Note A, the consolidated financial statements of EQGP have been retrospectively recast to include the pre-acquisition results of the May 2018 Acquisition and the EQM-RMP Merger because these transactions were between entities under common control.

[2]

As discussed in Note A, the consolidated financial statements of EQGP Holdings, LP (formerly known as EQT GP Holdings, LP) (EQGP) have been retrospectively recast to include the pre-acquisition results of Rice Olympus Midstream LLC (ROM), Strike Force Midstream Holdings LLC (Strike Force) and Rice West Virginia Midstream LLC (Rice WV), which were acquired by EQM effective on May 1, 2018 (the May 2018 Acquisition), and Rice Midstream Partners LP (RMP), which was acquired by EQM effective on July 23, 2018 (the EQM-RMP Merger), because these transactions were between entities under common control.

Acquisitions and Merger - Sched

Acquisitions and Merger - Schedule Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands		Nov. 13, 2017	Sep. 30, 2018	Dec. 31, 2017
Estimated Fair Value of Assets Acquired and Liabilities Assumed:
Goodwill	[1]		$ 1,384,872	$ 1,384,872
EQM | EQM-RMP Merger
Business Acquisition [Line Items]
Estimated fair value of RMP, ROM, Strike Force and Rice WV		$ 4,014,984
Estimated Fair Value of Assets Acquired and Liabilities Assumed:
Current assets		132,459
Intangible assets		623,200
Property and equipment, net		2,265,900
Other non-current assets		118
Current liabilities		(116,242)
RMP $850 Million Facility		(266,000)
Other non-current liabilities		(9,323)
Total estimated fair value of assets acquired and liabilities assumed		2,630,112
Goodwill		1,384,872
Estimated fair value of noncontrolling interest		$ 166,000
[1]	As discussed in Note A, the consolidated financial statements of EQGP have been retrospectively recast to include the pre-acquisition results of the May 2018 Acquisition and the EQM-RMP Merger because these transactions were between entities under common control.

Acquisitions and Merger - Sch_2

Acquisitions and Merger - Schedule of Change in Asset Retirement Obligation (Details) - USD ($) $ in Thousands	2 Months Ended	9 Months Ended
	Dec. 31, 2017	Sep. 30, 2018
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance, beginning of the year	$ 9,286	$ 9,321
Accretion expense	35	321
Balance, end of the year	$ 9,321	$ 9,642

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Narrative (Details) - EQM	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Contract billing cycle	21 days
Water
Disaggregation of Revenue [Line Items]
Contract billing cycle	21 days
Gathering
Disaggregation of Revenue [Line Items]
Weighted average remaining term		8 years
Transmission
Disaggregation of Revenue [Line Items]
Weighted average remaining term		15 years

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Schedule of Disaggregated Revenue Information, by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Water
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 22,373	$ 93,438
EQM
Disaggregation of Revenue [Line Items]
Total operating revenues	364,584	1,110,307
EQM | Firm reservation fee revenues | Firm reservation fee revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	195,267	596,899
EQM | Volumetric based fee revenue
Disaggregation of Revenue [Line Items]
Total operating revenues	146,944	419,970
EQM | Volumetric based fee revenue | Usage fees under firm contracts
Disaggregation of Revenue [Line Items]
Total operating revenues	13,992	44,706
EQM | Volumetric based fee revenue | Usage fees under interruptible contracts
Disaggregation of Revenue [Line Items]
Total operating revenues	132,952	375,264
EQM | Gathering
Disaggregation of Revenue [Line Items]
Total operating revenues	252,861	731,440
EQM | Gathering | Firm reservation fee revenues | Firm reservation fee revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	112,598	334,233
EQM | Gathering | Volumetric based fee revenue
Disaggregation of Revenue [Line Items]
Total operating revenues	140,263	397,207
EQM | Gathering | Volumetric based fee revenue | Usage fees under firm contracts
Disaggregation of Revenue [Line Items]
Total operating revenues	8,661	30,725
EQM | Gathering | Volumetric based fee revenue | Usage fees under interruptible contracts
Disaggregation of Revenue [Line Items]
Total operating revenues	131,602	366,482
EQM | Transmission
Disaggregation of Revenue [Line Items]
Total operating revenues	89,350	285,429
EQM | Transmission | Firm reservation fee revenues | Firm reservation fee revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	82,669	262,666
EQM | Transmission | Volumetric based fee revenue
Disaggregation of Revenue [Line Items]
Total operating revenues	6,681	22,763
EQM | Transmission | Volumetric based fee revenue | Usage fees under firm contracts
Disaggregation of Revenue [Line Items]
Total operating revenues	5,331	13,981
EQM | Transmission | Volumetric based fee revenue | Usage fees under interruptible contracts
Disaggregation of Revenue [Line Items]
Total operating revenues	1,350	8,782
EQM | Water
Disaggregation of Revenue [Line Items]
Total operating revenues	22,373	93,438
EQM | Water | Firm reservation fee revenues | Firm reservation fee revenues
Disaggregation of Revenue [Line Items]
Total operating revenues	0	0
EQM | Water | Volumetric based fee revenue
Disaggregation of Revenue [Line Items]
Total operating revenues	0	0
EQM | Water | Volumetric based fee revenue | Usage fees under firm contracts
Disaggregation of Revenue [Line Items]
Total operating revenues	0	0
EQM | Water | Volumetric based fee revenue | Usage fees under interruptible contracts
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 0	$ 0

Revenue from Contracts with C_5

Revenue from Contracts with Customers - Summary of Remaining Performance Obligations (Details) - EQM $ in Thousands	Sep. 30, 2018USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 207,095
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	888,863
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	967,895
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	972,959
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	967,893
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	5,448,794
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	9,453,499
Transmission | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 94,077
Remaining performance obligations, expected timing	3 months
Transmission | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 346,893
Remaining performance obligations, expected timing	1 year
Transmission | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 344,328
Remaining performance obligations, expected timing	1 year
Transmission | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 339,588
Remaining performance obligations, expected timing	1 year
Transmission | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 334,522
Remaining performance obligations, expected timing	1 year
Transmission | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 2,477,808
Remaining performance obligations, expected timing
Transmission | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 3,937,216
Time-and-materials Contract | Gathering | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 113,018
Remaining performance obligations, expected timing	3 months
Time-and-materials Contract | Gathering | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 476,270
Remaining performance obligations, expected timing	1 year
Time-and-materials Contract | Gathering | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 552,197
Remaining performance obligations, expected timing	1 year
Time-and-materials Contract | Gathering | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 562,196
Remaining performance obligations, expected timing	1 year
Time-and-materials Contract | Gathering | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 562,196
Remaining performance obligations, expected timing	1 year
Time-and-materials Contract | Gathering | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 2,834,111
Remaining performance obligations, expected timing
Time-and-materials Contract | Gathering | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 5,099,988
Minimum Volume Commitment Contract | Gathering | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 0
Remaining performance obligations, expected timing	3 months
Minimum Volume Commitment Contract | Gathering | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 65,700
Remaining performance obligations, expected timing	1 year
Minimum Volume Commitment Contract | Gathering | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 71,370
Remaining performance obligations, expected timing	1 year
Minimum Volume Commitment Contract | Gathering | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 71,175
Remaining performance obligations, expected timing	1 year
Minimum Volume Commitment Contract | Gathering | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 71,175
Remaining performance obligations, expected timing	1 year
Minimum Volume Commitment Contract | Gathering | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 136,875
Minimum Volume Commitment Contract | Gathering | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: (nil)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total firm reservation fees	$ 416,295

Equity and Net Income per Lim_3

Equity and Net Income per Limited Partner Unit - Narrative (Details) - shares		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Class of Stock [Line Items]
Partners' capital common units outstanding (in shares)	[1]	302,458,766		302,458,766		266,165,000
Partners' capital account, units issued (in shares)						0
Phantom Units
Class of Stock [Line Items]
Weighted average limited partner units outstanding - basic (in shares)		31,602	20,750	30,142	19,706
EQM
Class of Stock [Line Items]
Partners' capital account, units issued (in shares)				9,608
Number of general partner units (in shares)		121,899,440		121,899,440		82,024,773
Partners' capital, units acquired (in shares)				5,889,282
EQM Limited Partner Common Units | EQM
Class of Stock [Line Items]
Partners' capital common units outstanding (in shares)		21,811,643		21,811,643
Limited partner ownership interest (as a percent)				17.90%
EQM Limited Partner Common Units | EQT Corporation and Subsidiaries | EQGP
Class of Stock [Line Items]
Partners' capital common units outstanding (in shares)		276,008,766		276,008,766
Limited partner ownership interest (as a percent)				91.30%
EQM Limited Partner Common Units | EQT Corporation and Subsidiaries | EQM
Class of Stock [Line Items]
Limited partner ownership interest (as a percent)				12.70%
Partners' capital, units acquired (in shares)				15,433,812
EQM Limited Partner Common Units | EQM
Class of Stock [Line Items]
Partners' capital account, units issued (in shares)				9,608
Number of general partner units (in shares)		120,456,425		120,456,425		80,581,758
Partners' capital, units acquired (in shares)				5,889,282
EQM General Partner Units | EQM
Class of Stock [Line Items]
Number of general partner units (in shares)		1,443,015		1,443,015
General partner ownership interest (as a percent)				1.20%
EQM General Partner Units | EQM
Class of Stock [Line Items]
Partners' capital account, units issued (in shares)				0
Number of general partner units (in shares)		1,443,015		1,443,015		1,443,015
Partners' capital, units acquired (in shares)				0
[1]	As discussed in Note A, the consolidated financial statements of EQGP have been retrospectively recast to include the pre-acquisition results of the May 2018 Acquisition and the EQM-RMP Merger because these transactions were between entities under common control.

Equity and Net Income per Lim_4

Equity and Net Income per Limited Partner Unit - Summary of Units Issued (Details) - shares	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Increase (Decrease) in Partners' Capital [Roll Forward]
Common units issued (in shares)		0
EQM
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance (in shares)	82,024,773
Common units issued (in shares)	9,608
May 2018 Acquisition consideration (in shares)	5,889,282
Ending balance (in shares)	121,899,440	82,024,773
EQM Limited Partner Common Units | EQM
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance (in shares)	80,581,758
Common units issued (in shares)	9,608
May 2018 Acquisition consideration (in shares)	5,889,282
Ending balance (in shares)	120,456,425	80,581,758
EQM General Partner Units | EQM
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance (in shares)	1,443,015
Common units issued (in shares)	0
May 2018 Acquisition consideration (in shares)	0
Ending balance (in shares)	1,443,015	1,443,015
EQM-RMP Merger | EQM
Increase (Decrease) in Partners' Capital [Roll Forward]
Common units issued (in shares)	33,975,777
EQM-RMP Merger | EQM Limited Partner Common Units | EQM
Increase (Decrease) in Partners' Capital [Roll Forward]
Common units issued (in shares)	33,975,777
EQM-RMP Merger | EQM General Partner Units | EQM
Increase (Decrease) in Partners' Capital [Roll Forward]
Common units issued (in shares)	0

Financial Information by Busi_3

Financial Information by Business Segment - Narrative (Details) - segment	2 Months Ended	7 Months Ended
	Sep. 30, 2018	Jul. 22, 2018
Segment Reporting [Abstract]
Number of business segments	3	2

Financial Information by Busi_4

Financial Information by Business Segment - Schedule of Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018		Sep. 30, 2017		Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016
Revenues from external customers (including affiliates):
Total operating revenues	[1],[2]	$ 364,584	$ 206,293	$ 1,110,307		$ 603,180
Operating income (loss):
Total operating income	[1]	230,919	145,159	739,427		429,954
Reconciliation of operating income to net income:
Equity income	[1],[3]	16,087	6,025	35,836	[4]	15,413	[4]
Other income	[1]	1,345	637	3,193		3,576
Net interest expense	[1],[5]	40,966	9,414	76,661		25,994
Net income	[1]	207,385	142,407	701,795	[4]	422,949	[4]
Segment assets:
Assets	[4]	9,268,140		9,268,140					$ 7,999,634
Depreciation:
Depreciation	[1]	43,567	22,244	126,957	[4]	64,191	[4]
Expenditures for segment assets:
Accrued capital expenditures		91,300	26,500	91,300		26,500		$ 84,600	90,700	$ 31,200	$ 26,700
Operating segments
Revenues from external customers (including affiliates):
Total operating revenues		364,584	206,293	1,110,307		603,180
Segment assets:
Assets		9,142,025		9,142,025					7,811,933
Depreciation:
Depreciation		43,567	22,244	126,957		64,191
Expenditures for segment assets:
Expenditures for segment assets		240,084	70,494	616,947		224,407
Operating segments | Gathering
Revenues from external customers (including affiliates):
Total operating revenues		252,861	116,522	731,440		330,996
Operating income (loss):
Total operating income		177,902	85,932	510,755		243,061
Segment assets:
Assets		6,131,380		6,131,380					5,656,094
Depreciation:
Depreciation		25,359	9,983	72,309		28,398
Expenditures for segment assets:
Expenditures for segment assets		194,477	48,182	515,072		150,728
Operating segments | Transmission
Revenues from external customers (including affiliates):
Total operating revenues		89,350	89,771	285,429		272,184
Operating income (loss):
Total operating income		58,691	59,770	198,784		189,237
Segment assets:
Assets		2,833,519		2,833,519					1,947,566
Depreciation:
Depreciation		12,357	12,261	37,228		35,793
Expenditures for segment assets:
Expenditures for segment assets		37,626	22,312	84,517		73,679
Operating segments | Water
Revenues from external customers (including affiliates):
Total operating revenues		22,373	0	93,438		0
Operating income (loss):
Total operating income		(3,093)	0	35,627		0
Segment assets:
Assets		177,126		177,126					208,273
Depreciation:
Depreciation		5,851	0	17,420		0
Expenditures for segment assets:
Expenditures for segment assets		7,981	0	17,358		0
Headquarters
Operating income (loss):
Total operating income		(2,581)	$ (543)	(5,739)		$ (2,344)
Segment assets:
Assets		$ 126,115		$ 126,115					$ 187,701
[1]	As discussed in Note A, the consolidated financial statements of EQGP Holdings, LP (formerly known as EQT GP Holdings, LP) (EQGP) have been retrospectively recast to include the pre-acquisition results of Rice Olympus Midstream LLC (ROM), Strike Force Midstream Holdings LLC (Strike Force) and Rice West Virginia Midstream LLC (Rice WV), which were acquired by EQM effective on May 1, 2018 (the May 2018 Acquisition), and Rice Midstream Partners LP (RMP), which was acquired by EQM effective on July 23, 2018 (the EQM-RMP Merger), because these transactions were between entities under common control.
[2]	Operating revenues included affiliate revenues from EQT Corporation and subsidiaries (collectively, EQT) of $276.9 million and $154.2 million for the three months ended September 30, 2018 and 2017, respectively, and $827.8 million and $445.8 million for nine months ended September 30, 2018 and 2017, respectively. See Note F.
[3]	Represents equity income from Mountain Valley Pipeline, LLC (the MVP Joint Venture). See Note G.
[4]	As discussed in Note A, the consolidated financial statements of EQGP have been retrospectively recast to include the pre-acquisition results of the May 2018 Acquisition and the EQM-RMP Merger because these transactions were between entities under common control.
[5]	Net interest expense included interest income on the Preferred Interest in EES of $1.6 million and $1.7 million for the three months ended September 30, 2018 and 2017, respectively, and $5.0 million and $5.1 million for the nine months ended September 30, 2018 and 2017, respectively.

Investment in Unconsolidated _3

Investment in Unconsolidated Entity - Narrative (Details) $ in Thousands		1 Months Ended		3 Months Ended	9 Months Ended
		Oct. 31, 2018USD ($)	Sep. 30, 2018USD ($)mi	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)mi	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)
Schedule of Equity Method Investments [Line Items]
Capital call notice paid in October 2018	[1]				$ 446,049	$ 103,448
Capital call notice expected to be paid	[1]		$ 463,733		463,733		$ 105,734
EQM
Schedule of Equity Method Investments [Line Items]
Issuance of performance guarantee			$ 91,000		$ 91,000
EQM | MVP
Schedule of Equity Method Investments [Line Items]
Length of pipeline (in miles) | mi			300		300
EQM | MVP Southgate Project
Schedule of Equity Method Investments [Line Items]
Length of pipeline (in miles) | mi			70		70
Variable Interest Entity, Not Primary Beneficiary | MVP Joint Venture
Schedule of Equity Method Investments [Line Items]
Capital call notice issued			$ 456,000
Variable Interest Entity, Not Primary Beneficiary | MVP Joint Venture | EQM
Schedule of Equity Method Investments [Line Items]
Ownership interest			45.50%		45.50%
Maximum financial statement exposure			$ 1,391,000		$ 1,391,000
Variable Interest Entity, Not Primary Beneficiary | MVP Southgate Project | EQM
Schedule of Equity Method Investments [Line Items]
Ownership interest			32.70%		32.70%
Beneficial Owner | MVP Joint Venture
Schedule of Equity Method Investments [Line Items]
Percentage of ownership interest					66.67%
Subsequent Event | Variable Interest Entity, Not Primary Beneficiary | MVP Joint Venture
Schedule of Equity Method Investments [Line Items]
Capital call notice paid in October 2018		$ 175,200
Subsequent Event | Variable Interest Entity, Not Primary Beneficiary | MVP Southgate Project
Schedule of Equity Method Investments [Line Items]
Capital call notice paid in October 2018		$ 7,700
Scenario, Forecast | Variable Interest Entity, Not Primary Beneficiary | MVP Joint Venture
Schedule of Equity Method Investments [Line Items]
Capital call notice expected to be paid				$ 280,800
Scenario, Forecast | Variable Interest Entity, Not Primary Beneficiary | MVP Southgate Project
Schedule of Equity Method Investments [Line Items]
Capital call notice issued				$ 7,700
[1]	As discussed in Note A, the consolidated financial statements of EQGP have been retrospectively recast to include the pre-acquisition results of the May 2018 Acquisition and the EQM-RMP Merger because these transactions were between entities under common control.

Investment in Unconsolidated _4

Investment in Unconsolidated Entity - Schedule of Unaudited Condensed Financial Statements for the Investment in Unconsolidated Equity (Details) - MVP Joint Venture - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Condensed Consolidated Balance Sheets
Current assets	$ 1,260,789		$ 1,260,789		$ 330,271
Noncurrent assets	2,330,467		2,330,467		747,728
Total assets	3,591,256		3,591,256		1,077,999
Current liabilities	726,528		726,528		65,811
Equity	2,864,728		2,864,728		1,012,188
Total liabilities and equity	3,591,256		3,591,256		$ 1,077,999
Condensed Statements of Consolidated Operations
Net interest income	11,958	$ 3,227	25,873	$ 8,205
AFUDC - equity	23,417	10,055	52,906	25,710
Net income	$ 35,375	$ 13,282	$ 78,779	$ 33,915

Debt - EQGP Working Capital Fac

Debt - EQGP Working Capital Facility (Details) - Line of credit - EQT Corporation and Subsidiaries - Working Capital Facility - USD ($)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Short-term Debt [Line Items]
Maximum borrowing capacity	$ 50,000,000
Credit facility borrowings			$ 200,000
Maximum amount of short term loans outstanding	$ 200,000	$ 300,000
Weighted average annual interest rate (in percent)	3.30%	2.40%

Debt - EQM $1 Billion Facility

Debt - EQM $1 Billion Facility (Details)		3 Months Ended		9 Months Ended
		Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Oct. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Jul. 31, 2017USD ($)
Debt Instrument [Line Items]
Letters of credit outstanding	[1]	$ 22,000,000		$ 22,000,000			$ 466,000,000
Line of credit | $1 Billion Credit Facility
Debt Instrument [Line Items]
Maximum amount of outstanding borrowings					$ 177,000,000
Weighted average annual interest rate (as a percent)					2.70%
EQM | $1 Billion Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Borrowings outstanding		22,000,000		22,000,000			180,000,000
Letters of credit outstanding		1,000,000		1,000,000			$ 0
EQM | Line of credit | $1 Billion Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 1,000,000,000		$ 1,000,000,000				$ 1,000,000,000
Consolidated leverage ratio		5		5
Consolidated leverage ratio for certain measurement periods		5.50		5.50
Maximum amount of outstanding borrowings		$ 74,000,000	$ 177,000,000	$ 420,000,000
Average daily balance		$ 22,000,000	$ 95,000,000	$ 147,000,000	$ 32,000,000
Weighted average annual interest rate (as a percent)		3.70%	2.70%	3.20%
Subsequent Event | EQM | Line of credit | $1 Billion Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 3,000,000,000
[1]	As discussed in Note A, the consolidated financial statements of EQGP have been retrospectively recast to include the pre-acquisition results of the May 2018 Acquisition and the EQM-RMP Merger because these transactions were between entities under common control.

Debt - EQM 364-Day Facility (De

Debt - EQM 364-Day Facility (Details) - USD ($)	Apr. 25, 2018	Jun. 25, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Jul. 31, 2017
Line of credit | $1 Billion Credit Facility
Line of Credit Facility [Line Items]
Maximum amount of outstanding borrowings						$ 177,000,000
Weighted average annual interest rate (as a percent)						2.70%
EQM | Line of credit | $1 Billion Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 1,000,000,000		$ 1,000,000,000			$ 1,000,000,000
Maximum amount of outstanding borrowings			74,000,000	$ 177,000,000	420,000,000
Average daily balance			$ 22,000,000	$ 95,000,000	$ 147,000,000	$ 32,000,000
Weighted average annual interest rate (as a percent)			3.70%	2.70%	3.20%
EQM | Line of credit | $2.5 Billion EQM Term Loan Facility
Line of Credit Facility [Line Items]
Line of credit expiration period	364 days
Maximum borrowing capacity	$ 2,500,000,000
Maximum amount of outstanding borrowings			$ 1,825,000,000
Average daily balance					$ 1,231,000,000
Weighted average annual interest rate (as a percent)		3.30%
Revolving Credit Facility | EQM
Line of Credit Facility [Line Items]
Basis spread above commitment fee					0.10%
Revolving Credit Facility | EQM | $1 Billion Credit Facility
Line of Credit Facility [Line Items]
Borrowings outstanding			22,000,000		$ 22,000,000		$ 180,000,000
Revolving Credit Facility | EQM | $500 Million Uncommitted Revolving Loan Agreement
Line of Credit Facility [Line Items]
Line of credit expiration period					364 days
Maximum borrowing capacity			500,000,000		$ 500,000,000
Borrowings outstanding			0		0		$ 0
Maximum amount of outstanding borrowings			$ 0	$ 40,000,000	$ 0	100,000,000
Average daily balance				$ 11,000,000		$ 30,000,000
Weighted average annual interest rate (as a percent)				2.40%		2.20%

Debt - EQM Term Loan Facility (

Debt - EQM Term Loan Facility (Details) - USD ($)	Apr. 25, 2018	Jun. 25, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jul. 31, 2017
EQM | Line of credit | $2.5 Billion EQM Term Loan Facility
Short-term Debt [Line Items]
Maximum borrowing capacity	$ 2,500,000,000
Line of credit expiration period	364 days
Write off of deferred issuance cost					$ 3,000,000
Maximum amount of outstanding borrowings			$ 1,825,000,000
Average daily balance					1,231,000,000
Weighted average annual interest rate (as a percent)		3.30%
Line of credit | $1 Billion Credit Facility
Short-term Debt [Line Items]
Maximum amount of outstanding borrowings						$ 177,000,000
Weighted average annual interest rate (as a percent)						2.70%
Line of credit | EQM | $1 Billion Credit Facility
Short-term Debt [Line Items]
Maximum borrowing capacity			1,000,000,000		1,000,000,000		$ 1,000,000,000
Maximum amount of outstanding borrowings			74,000,000	$ 177,000,000	420,000,000
Average daily balance			$ 22,000,000	$ 95,000,000	$ 147,000,000	$ 32,000,000
Weighted average annual interest rate (as a percent)			3.70%	2.70%	3.20%

Debt - RMP $850 Million Facilit

Debt - RMP $850 Million Facility (Details) - USD ($)		Jul. 23, 2018	Dec. 31, 2017	Sep. 30, 2018	Sep. 30, 2018
Debt Instrument [Line Items]
Letters of credit outstanding	[1]		$ 466,000,000	$ 22,000,000	$ 22,000,000
Line of credit | RMP $850 Million Facility
Debt Instrument [Line Items]
Maximum borrowing capacity				850,000,000	850,000,000
Maximum amount of outstanding borrowings			286,000,000	260,000,000	375,000,000
Average daily balance				$ 249,000,000	$ 300,000,000
Weighted average annual interest rate (as a percent)				4.10%	3.80%
Revolving Credit Facility | RMP $850 Million Facility
Debt Instrument [Line Items]
Letters of credit outstanding			$ 1,000,000
EQM-RMP Merger | EQM
Debt Instrument [Line Items]
Repayments of debt		$ 260,000,000
[1]	As discussed in Note A, the consolidated financial statements of EQGP have been retrospectively recast to include the pre-acquisition results of the May 2018 Acquisition and the EQM-RMP Merger because these transactions were between entities under common control.

Debt - 2018 Senior Notes (Detai

Debt - 2018 Senior Notes (Details)	3 Months Ended
	Sep. 30, 2018USD ($)
Line of credit | RMP $850 Million Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 850,000,000
EQM | Senior Notes
Debt Instrument [Line Items]
Net proceeds from offering	2,465,800,000
Discount	11,800,000
Debt issuance costs	$ 22,400,000
EQM | Senior Notes | EQM 4.75% Senior Notes Due 2023
Debt Instrument [Line Items]
Senior notes (as a percent)	4.75%
Aggregate principal amount	$ 1,100,000,000
EQM | Senior Notes | EQM 5.50% Senior Notes Due 2028
Debt Instrument [Line Items]
Senior notes (as a percent)	5.50%
Aggregate principal amount	$ 850,000,000
EQM | Senior Notes | EQM 6.50% Senior Notes Due 2048
Debt Instrument [Line Items]
Senior notes (as a percent)	6.50%
Aggregate principal amount	$ 550,000,000

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) - EQM - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Carrying Value | EES
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of preferred interest	$ 116	$ 119
Level 3 | Fair Value | EES
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of preferred interest	122	133
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of long-term debt	3,455	987
Fair Value, Measurements, Recurring | Level 2 | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of long-term debt	$ 3,532	$ 1,006

Distributions - Summary of Cash

Distributions - Summary of Cash Distributions to Unitholders (Details) - USD ($) $ / shares in Units, $ in Thousands		Oct. 23, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2018	Sep. 30, 2017
Distribution Made to Limited Partner [Line Items]
Total quarterly distribution per common unit (in dollars per share)	[1],[2]		$ 0.315				$ 0.228			$ 0.879	$ 0.629
EQM
Distribution Made to Limited Partner [Line Items]
Total quarterly distribution per common unit (in dollars per share)				$ 1.09	$ 1.065	$ 1.025	$ 0.980	$ 0.935	$ 0.89
Cash distributions declared				$ 201,809	$ 132,321	$ 125,890	$ 118,673	$ 111,455	$ 104,238
EQGP
Distribution Made to Limited Partner [Line Items]
Total quarterly distribution per common unit (in dollars per share)				$ 0.30600	$ 0.258	$ 0.244	$ 0.228	$ 0.21	$ 0.191
Total distribution				$ 92,552	$ 68,671	$ 64,944	$ 60,686	$ 55,895	$ 50,838
EQGP | EQM
Distribution Made to Limited Partner [Line Items]
Cash distributions declared				$ 94,286	$ 69,721	$ 65,651	$ 61,078	$ 56,505	$ 51,933
Subsequent Event | EQM
Distribution Made to Limited Partner [Line Items]
Total quarterly distribution per common unit (in dollars per share)		$ 1.115
Cash distributions declared		$ 207,735
Subsequent Event | EQGP
Distribution Made to Limited Partner [Line Items]
Total quarterly distribution per common unit (in dollars per share)		$ 0.315
Total distribution		$ 95,275
Subsequent Event | EQGP | EQM
Distribution Made to Limited Partner [Line Items]
Cash distributions declared		$ 97,746
[1]	As discussed in Note A, the consolidated financial statements of EQGP Holdings, LP (formerly known as EQT GP Holdings, LP) (EQGP) have been retrospectively recast to include the pre-acquisition results of Rice Olympus Midstream LLC (ROM), Strike Force Midstream Holdings LLC (Strike Force) and Rice West Virginia Midstream LLC (Rice WV), which were acquired by EQM effective on May 1, 2018 (the May 2018 Acquisition), and Rice Midstream Partners LP (RMP), which was acquired by EQM effective on July 23, 2018 (the EQM-RMP Merger), because these transactions were between entities under common control.
[2]	Represents the cash distributions declared related to the period presented. See Note J.

Distributions - Narrative (Deta

Distributions - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		Oct. 25, 2018	Oct. 23, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2018	Sep. 30, 2017
Class of Stock [Line Items]
Cash distributions declared per unit (in dollars per share)	[1],[2]			$ 0.315				$ 0.228			$ 0.879	$ 0.629
EQM
Class of Stock [Line Items]
Cash distributions declared per unit (in dollars per share)					$ 1.09	$ 1.065	$ 1.025	0.980	$ 0.935	$ 0.89
EQGP
Class of Stock [Line Items]
Cash distributions declared per unit (in dollars per share)					$ 0.30600	$ 0.258	$ 0.244	$ 0.228	$ 0.21	$ 0.191
Cash distribution in respect of limited partner interest					$ 92,552	$ 68,671	$ 64,944	$ 60,686	$ 55,895	$ 50,838
Subsequent Event | EQM
Class of Stock [Line Items]
Cash distributions declared per unit (in dollars per share)			$ 1.115
Cash distribution related to incentive distribution rights		$ 71,000
Subsequent Event | EQM | Limited Partner
Class of Stock [Line Items]
Cash distribution in respect of limited partner interest		24,300
Subsequent Event | EQM | EQM General Partner Units
Class of Stock [Line Items]
Cash distribution related to general partner interest		$ 2,500
Subsequent Event | EQGP
Class of Stock [Line Items]
Cash distributions declared per unit (in dollars per share)			$ 0.315
Cash distribution in respect of limited partner interest			$ 95,275
[1]	As discussed in Note A, the consolidated financial statements of EQGP Holdings, LP (formerly known as EQT GP Holdings, LP) (EQGP) have been retrospectively recast to include the pre-acquisition results of Rice Olympus Midstream LLC (ROM), Strike Force Midstream Holdings LLC (Strike Force) and Rice West Virginia Midstream LLC (Rice WV), which were acquired by EQM effective on May 1, 2018 (the May 2018 Acquisition), and Rice Midstream Partners LP (RMP), which was acquired by EQM effective on July 23, 2018 (the EQM-RMP Merger), because these transactions were between entities under common control.
[2]	Represents the cash distributions declared related to the period presented. See Note J.

Consolidated Variable Interes_3

Consolidated Variable Interest Entity (Details) - Variable Interest Entity, Primary Beneficiary - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Cash and cash equivalents
Variable Interest Entity [Line Items]
Assets	$ 4,712	$ 2,557
Accounts receivable
Variable Interest Entity [Line Items]
Assets	58,358	28,804
Accounts receivable – affiliate
Variable Interest Entity [Line Items]
Assets	167,481	103,304
Other current assets
Variable Interest Entity [Line Items]
Assets	9,080	12,662
Net property, plant and equipment
Variable Interest Entity [Line Items]
Assets	5,608,358	2,804,059
Investment in unconsolidated entity
Variable Interest Entity [Line Items]
Assets	1,300,430	460,546
Goodwill
Variable Interest Entity [Line Items]
Assets	1,384,872	0
Intangible assets, net
Variable Interest Entity [Line Items]
Assets	586,500	0
Other assets
Variable Interest Entity [Line Items]
Assets	146,400	136,895
Accounts payable
Variable Interest Entity [Line Items]
Liabilities	134,026	47,040
Due to related party
Variable Interest Entity [Line Items]
Liabilities	39,709	31,673
Capital contribution payable to MVP Joint Venture
Variable Interest Entity [Line Items]
Liabilities	463,733	105,734
Accrued interest
Variable Interest Entity [Line Items]
Liabilities	46,165	10,926
Accrued liabilities
Variable Interest Entity [Line Items]
Liabilities	16,401	16,871
Credit facility borrowings of EQM and RMP
Variable Interest Entity [Line Items]
Liabilities	22,000	180,000
EQM senior notes
Variable Interest Entity [Line Items]
Liabilities	3,455,296	987,352
Regulatory and other long-term liabilities
Variable Interest Entity [Line Items]
Liabilities	$ 31,010	$ 20,273