Rice Midstream Partners LP Rice Midstream Partners LP	6 Months Ended
Jun. 30, 2018
Equity Method Investments and Joint Ventures [Abstract]
Rice Midstream Partners LP	Rice Midstream Partners LP In connection with the Rice Merger, the Company acquired a 28.1% limited partner interest, all of the IDRs and the entire non-economic general partner interest in RMP. See the discussion of the RMP IDR Purchase and Midstream Mergers in Note B. Due to the timing of the Midstream Mergers, RMP did not declare a cash distribution for the second quarter 2018. Investment in Nonconsolidated Entity The Mountain Valley Pipeline, LLC (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 June 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. The MVP Joint Venture has modified its construction schedule for the MVP and now anticipates a first quarter 2019 in-service date. As currently designed, the total cost for the MVP is expected to be $3.5 billion to $3.7 billion, excluding Allowance for Funds Used During Construction (AFUDC). In May 2018, the MVP Joint Venture issued a capital call notice to MVP Holdco, LLC (MVP Holdco), a direct wholly owned subsidiary of EQM, for $445.9 million, of which $193.4 million was paid in July 2018 and $252.5 million is expected to be paid in the third quarter of 2018. The capital contribution payable has been reflected on the Condensed Consolidated Balance Sheet as of June 30, 2018 with a corresponding increase to the Company's investment in the MVP Joint Venture. Equity income is primarily EQM's portion of the MVP Joint Venture's AFUDC on construction of the MVP. As of June 30, 2018, EQM had issued a $91 million performance guarantee in favor of the MVP Joint Venture to provide performance assurances for MVP Holdco's obligations to fund its proportionate share of the construction budget for the MVP. As of June 30, 2018, EQM's maximum financial statement exposure related to the MVP Joint Venture was approximately $1,094 million, which consists of the investment in nonconsolidated entity balance on the Condensed Consolidated Balance Sheet as of June 30, 2018 and amounts that could have become due under EQM's performance guarantee as of that date. 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. The MVP Southgate project is anchored by a firm capacity commitment from PSNC Energy. The preliminary MVP Southgate project cost estimate is $350 million to $500 million, which is expected to be spent in 2019 and 2020. EQM is expected to have between 33% and 48% ownership in the MVP Southgate project and will operate the pipeline. Subject to approval by the FERC, the MVP Southgate has a targeted in-service date of the fourth quarter 2020.

Investment in Nonconsolidated Entity

The Mountain Valley Pipeline, LLC (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 June 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. The MVP Joint Venture has modified its construction schedule for the MVP and now anticipates a first quarter 2019 in-service date. As currently designed, the total cost for the MVP is expected to be $3.5 billion to $3.7 billion, excluding Allowance for Funds Used During Construction (AFUDC).

In May 2018, the MVP Joint Venture issued a capital call notice to MVP Holdco, LLC (MVP Holdco), a direct wholly owned subsidiary of EQM, for $445.9 million, of which $193.4 million was paid in July 2018 and $252.5 million is expected to be paid in the third quarter of 2018. The capital contribution payable has been reflected on the Condensed Consolidated Balance Sheet as of June 30, 2018 with a corresponding increase to the Company's investment in the MVP Joint Venture.

Equity income is primarily EQM's portion of the MVP Joint Venture's AFUDC on construction of the MVP.

As of June 30, 2018, EQM had issued a $91 million performance guarantee in favor of the MVP Joint Venture to provide performance assurances for MVP Holdco's obligations to fund its proportionate share of the construction budget for the MVP. As of June 30, 2018, EQM's maximum financial statement exposure related to the MVP Joint Venture was approximately $1,094 million, which consists of the investment in nonconsolidated entity balance on the Condensed Consolidated Balance Sheet as of June 30, 2018 and amounts that could have become due under EQM's performance guarantee as of that date.

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. The MVP Southgate project is anchored by a firm capacity commitment from PSNC Energy. The preliminary MVP Southgate project cost estimate is $350 million to $500 million, which is expected to be spent in 2019 and 2020. EQM is expected to have between 33% and 48% ownership in the MVP Southgate project and will operate the pipeline. Subject to approval by the FERC, the MVP Southgate has a targeted in-service date of the fourth quarter 2020.