Commitments and Contingencies	12 Months Ended
Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The Company has commitments for demand charges under existing long-term contracts and binding precedent agreements with various unconsolidated pipelines as well as commitments with third parties for processing capacity. Future payments for these items as of December 31, 2017 totaled $16.4 billion (2018 - $652.7 million, 2019 - $1,022.2 million, 2020 - $1,007.5 million, 2021 - $1,004.2 million, 2022 - $1,000.5 million and thereafter - $11.7 billion). The Company has entered into agreements to release some of its capacity to various third parties. The Company's commitments for demand charges under existing long-term contracts and binding precedent agreements with EQM totaled $5.6 billion as of December 31, 2017. The Company has agreements with drilling contractors to provide drilling equipment and services to the Company. These obligations totaled approximately $92.3 million as of December 31, 2017. Operating lease rentals for drilling contractors, office locations and warehouse buildings, as well as a limited amount of equipment, amounted to approximately $60.8 million in 2017, $44.1 million in 2016 and $85.2 million in 2015. Future lease payments under non-cancelable operating leases as of December 31, 2017 totaled $231.5 million (2018 - $70.9 million, 2019 - $51.3 million, 2020 - $13.4 million, 2021 – $13.6 million, 2022 - $13.6 million and thereafter - $68.7 million). RMP is party to a water system expansion and supply agreement with an affiliate of the Company and Southwestern Pennsylvania Water Authority (SPWA) pursuant to which the Company and RMP have agreed to jointly fund and assist SPWA in the construction and expansion of its water supply system serving parts of Greene, Fayette and Washington Counties in Pennsylvania. To date, RMP has executed authorizations for expenditures totaling approximately $29.5 million, and have funded approximately $9.7 million during the year ended 2017. In exchange for the Company and RMP’s agreement to fund this construction and expansion, SPWA granted to the Company and RMP preferred rights to water volumes supplied through the system for use in the Company and RMP’s oil and gas operations. Additionally, the Company and RMP are entitled to receive a surcharge assessed by SPWA against all oil and gas customers to whom water is supplied through the system in an amount equal to $3.50 per 1,000 gallons of water sold. All facilities and improvements constructed pursuant to the agreement are the property of SPWA. Commencing in January 2017, the Company has commitments for frac sand to be used as a proppant in its hydraulic fracturing operations. Future commitments under these contracts as of December 31, 2017 totaled $30.6 million (2018 - $15.2 million and 2019 - $15.4 million). If any credit rating agency downgrades the Company's or EQM's ratings, particularly below investment grade, the Company or EQM may be required to provide additional credit assurances in support of commercial agreements, such as pipeline capacity contracts, joint venture arrangements and subsidiary construction contracts, the amount of which may be substantial. Prior to the Rice Merger, Rice entered into a Development Agreement and Area of Mutual Interest Agreement (collectively, the Utica Development Agreements) with the minority interest owner in Strike Force Midstream, covering approximately 50,000 aggregate net acres in the Utica Shale in Belmont County, Ohio. Pursuant to the Utica Development Agreements, the Company had approximately 68.7% participating interest in acreage currently owned or to be acquired by the Company or the minority interest owner in Strike Force Midstream located within Goshen and Smith Townships (the Northern Contract Area) and an approximately 48.2% participating interest in acreage currently owned or to be acquired by the Company or the minority interest owner in Strike Force Midstream located within Wayne and Washington Townships (the Southern Contract Area), all within Belmont County, Ohio. The majority of the remaining participating interests are held by the minority interest owner in Strike Force Midstream. The participating interests of the Company and the minority interest owner in Strike Force Midstream in each of the Northern and Southern Contract Areas approximated the Company’s then-current relative acreage positions in each area. Pursuant to the Development Agreement, the Company is named the operator of drilling units located in the Northern Contract Area and the minority interest owner in Strike Force Midstream is named the operator of drilling units located in the Southern Contract Area. Upon development of a well on the subject acreage, the Company and the minority interest owner in Strike Force Midstream will convey to one another, pursuant to a cross conveyance, a working interest percentage equal to the amount of the underlying working interest multiplied by the applicable participating interest. The Utica Development Agreements have terms of 10 years and are terminable upon 90 days’ notice by either party; provided that, with respect to interests included within a drilling unit, such interests shall remain subject to the applicable joint operating agreement and the Company and the minority interest owner in Strike Force Midstream shall remain operators of drilling units located in the Northern and Southern Contract Areas, respectively, following such termination. The Company is subject to various federal, state and local environmental and environmentally-related laws and regulations. These laws and regulations, which are constantly changing, can require expenditures for remediation and may in certain instances result in the assessment of fines. The Company has established procedures for ongoing evaluation of its operations to identify potential environmental exposures and to assure compliance with regulatory policies and procedures. The estimated costs associated with identified situations that require remedial action are accrued. However, certain costs are deferred as regulatory assets when recoverable through regulated rates. Ongoing expenditures for compliance with environmental laws and regulations, including investments in plant and facilities to meet environmental requirements, have not been material. Management believes that any such required expenditures will not be significantly different in either their nature or amount in the future and does not know of any environmental liabilities that will have a material effect on the Company’s financial position, results of operations or liquidity. The Company has identified situations that require remedial action for which approximately $11.2 million is included in other liabilities and credits in the Consolidated Balance Sheets as of December 31, 2017. In the ordinary course of business, various legal and regulatory claims and proceedings are pending or threatened against the Company. While the amounts claimed may be substantial, the Company is unable to predict with certainty the ultimate outcome of such claims and proceedings. The Company accrues legal or other direct costs related to loss contingencies when actually incurred. The Company has established reserves it believes to be appropriate for pending matters and, after consultation with counsel and giving appropriate consideration to available insurance, the Company believes that the ultimate outcome of any matter currently pending against the Company will not materially affect the financial position, results of operations or liquidity of the Company.

Commitments and Contingencies

The Company has commitments for demand charges under existing long-term contracts and binding precedent agreements with various unconsolidated pipelines as well as commitments with third parties for processing capacity. Future payments for these items as of December 31, 2017 totaled $16.4 billion (2018 - $652.7 million, 2019 - $1,022.2 million, 2020 - $1,007.5 million, 2021 - $1,004.2 million, 2022 - $1,000.5 million and thereafter - $11.7 billion). The Company has entered into agreements to release some of its capacity to various third parties. The Company's commitments for demand charges under existing long-term contracts and binding precedent agreements with EQM totaled $5.6 billion as of December 31, 2017.

The Company has agreements with drilling contractors to provide drilling equipment and services to the Company. These obligations totaled approximately $92.3 million as of December 31, 2017. Operating lease rentals for drilling contractors, office locations and warehouse buildings, as well as a limited amount of equipment, amounted to approximately $60.8 million in 2017, $44.1 million in 2016 and $85.2 million in 2015. Future lease payments under non-cancelable operating leases as of December 31, 2017 totaled $231.5 million (2018 - $70.9 million, 2019 - $51.3 million, 2020 - $13.4 million, 2021 – $13.6 million, 2022 - $13.6 million and thereafter - $68.7 million).

RMP is party to a water system expansion and supply agreement with an affiliate of the Company and Southwestern Pennsylvania Water Authority (SPWA) pursuant to which the Company and RMP have agreed to jointly fund and assist SPWA in the construction and expansion of its water supply system serving parts of Greene, Fayette and Washington Counties in Pennsylvania. To date, RMP has executed authorizations for expenditures totaling approximately $29.5 million, and have funded approximately $9.7 million during the year ended 2017. In exchange for the Company and RMP’s agreement to fund this construction and expansion, SPWA granted to the Company and RMP preferred rights to water volumes supplied through the system for use in the Company and RMP’s oil and gas operations. Additionally, the Company and RMP are entitled to receive a surcharge assessed by SPWA against all oil and gas customers to whom water is supplied through the system in an amount equal to $3.50 per 1,000 gallons of water sold. All facilities and improvements constructed pursuant to the agreement are the property of SPWA.

Commencing in January 2017, the Company has commitments for frac sand to be used as a proppant in its hydraulic fracturing operations. Future commitments under these contracts as of December 31, 2017 totaled $30.6 million (2018 - $15.2 million and 2019 - $15.4 million).

If any credit rating agency downgrades the Company's or EQM's ratings, particularly below investment grade, the Company or EQM may be required to provide additional credit assurances in support of commercial agreements, such as pipeline capacity contracts, joint venture arrangements and subsidiary construction contracts, the amount of which may be substantial.

Prior to the Rice Merger, Rice entered into a Development Agreement and Area of Mutual Interest Agreement (collectively, the Utica Development Agreements) with the minority interest owner in Strike Force Midstream, covering approximately 50,000 aggregate net acres in the Utica Shale in Belmont County, Ohio. Pursuant to the Utica Development Agreements, the Company had approximately 68.7% participating interest in acreage currently owned or to be acquired by the Company or the minority interest owner in Strike Force Midstream located within Goshen and Smith Townships (the Northern Contract Area) and an approximately 48.2% participating interest in acreage currently owned or to be acquired by the Company or the minority interest owner in Strike Force Midstream located within Wayne and Washington Townships (the Southern Contract Area), all within Belmont County, Ohio. The majority of the remaining participating interests are held by the minority interest owner in Strike Force Midstream. The participating interests of the Company and the minority interest owner in Strike Force Midstream in each of the Northern and Southern Contract Areas approximated the Company’s then-current relative acreage positions in each area.

Pursuant to the Development Agreement, the Company is named the operator of drilling units located in the Northern Contract Area and the minority interest owner in Strike Force Midstream is named the operator of drilling units located in the Southern Contract Area. Upon development of a well on the subject acreage, the Company and the minority interest owner in Strike Force Midstream will convey to one another, pursuant to a cross conveyance, a working interest percentage equal to the amount of the underlying working interest multiplied by the applicable participating interest.

The Utica Development Agreements have terms of 10 years and are terminable upon 90 days’ notice by either party; provided that, with respect to interests included within a drilling unit, such interests shall remain subject to the applicable joint operating agreement and the Company and the minority interest owner in Strike Force Midstream shall remain operators of drilling units located in the Northern and Southern Contract Areas, respectively, following such termination.

The Company is subject to various federal, state and local environmental and environmentally-related laws and regulations. These laws and regulations, which are constantly changing, can require expenditures for remediation and may in certain instances result in the assessment of fines. The Company has established procedures for ongoing evaluation of its operations to identify potential environmental exposures and to assure compliance with regulatory policies and procedures. The estimated costs associated with identified situations that require remedial action are accrued. However, certain costs are deferred as regulatory assets when recoverable through regulated rates. Ongoing expenditures for compliance with environmental laws and regulations, including investments in plant and facilities to meet environmental requirements, have not been material. Management believes that any such required expenditures will not be significantly different in either their nature or amount in the future and does not know of any environmental liabilities that will have a material effect on the Company’s financial position, results of operations or liquidity. The Company has identified situations that require remedial action for which approximately $11.2 million is included in other liabilities and credits in the Consolidated Balance Sheets as of December 31, 2017.

In the ordinary course of business, various legal and regulatory claims and proceedings are pending or threatened against the Company. While the amounts claimed may be substantial, the Company is unable to predict with certainty the ultimate outcome of such claims and proceedings. The Company accrues legal or other direct costs related to loss contingencies when actually incurred. The Company has established reserves it believes to be appropriate for pending matters and, after consultation with counsel and giving appropriate consideration to available insurance, the Company believes that the ultimate outcome of any matter currently pending against the Company will not materially affect the financial position, results of operations or liquidity of the Company.