Revolving Credit Facilities	6 Months Ended
Jun. 30, 2017
Short-term Debt [Abstract]
Revolving Credit Facilities	Revolving Credit Facilities The Company has a $1.5 billion unsecured revolving credit facility that expires in February 2019. The Company had no borrowings or letters of credit outstanding under its revolving credit facility as of June 30, 2017 or December 31, 2016 or at any time during the three and six months ended June 30, 2017 and 2016. EQM has a $750 million credit facility that expires in February 2019. EQM had no borrowings and no letters of credit outstanding under the $750 million credit facility as of June 30, 2017 or December 31, 2016. There were no borrowings outstanding at any time during the three and six months ended June 30, 2017. During the three and six months ended June 30, 2016, the maximum amount of EQM's outstanding borrowings under the credit facility at any time was $128 million and $299 million, respectively, and the average daily balance was approximately $33 million and $83 million, respectively. Interest was incurred at a weighted average annual interest rate of approximately 1.9% for the three and six months ended June 30, 2016. See “Capital Resources and Liquidity” in Item 2, "Management’s Discussion and Analysis of Financial Condition and Results of Operations" for description of the proposed amendments to the Company's $1.5 billion revolving credit facility and EQM's $750 million credit facility.

Revolving Credit Facilities

The Company has a $1.5 billion unsecured revolving credit facility that expires in February 2019. The Company had no borrowings or letters of credit outstanding under its revolving credit facility as of June 30, 2017 or December 31, 2016 or at any time during the three and six months ended June 30, 2017 and 2016.

EQM has a $750 million credit facility that expires in February 2019. EQM had no borrowings and no letters of credit outstanding under the $750 million credit facility as of June 30, 2017 or December 31, 2016. There were no borrowings outstanding at any time during the three and six months ended June 30, 2017. During the three and six months ended June 30, 2016, the maximum amount of EQM's outstanding borrowings under the credit facility at any time was $128 million and $299 million, respectively, and the average daily balance was approximately $33 million and $83 million, respectively. Interest was incurred at a weighted average annual interest rate of approximately 1.9% for the three and six months ended June 30, 2016.

See “Capital Resources and Liquidity” in Item 2, "Management’s Discussion and Analysis of Financial Condition and Results of Operations" for description of the proposed amendments to the Company's $1.5 billion revolving credit facility and EQM's $750 million credit facility.