Related Party	12 Months Ended
Dec. 31, 2014
Related Party Transactions [Abstract]
Related Party Transactions Disclosure [Text Block]	NOTE 27—RELATED PARTY TRANSACTIONS On September 30 2011, CNX Gas Company and Noble Energy, Inc. (Noble Energy), an unrelated third party and joint venture partner, formed CONE Gathering LLC to develop and operate each company's gas gathering system needs in the Marcellus Shale play. CONSOL Energy accounts for CNX Gas Company's 50% ownership interest in CONE Gathering LLC under the equity method of accounting. On May 30, 2014, CONE Gathering LLC formed CONE Midstream Partners, LP (the Partnership). On September 30, 2014, CONE Gathering LLC contributed certain assets and liabilities to the Partnership, which closed on an initial public offering of 20,125,000 of its common units at a per unit price of $22.00, which included a 2,625,000 common unit over-allotment option that was exercised in full by the underwriters (the CONE IPO). The Partnership received net proceeds of $413,005 in connection with the CONE IPO, which is net of underwriting discounts, commissions, structuring fees and other offering expense of $29,745. The Partnership distributed $203,986 of the net proceeds from the CONE IPO to CNX Gas Company, which CONSOL Energy recorded as a return on equity investments within cash flows from operating activities and as a net investment in equity affiliates within cash flows from investing activities, pursuant to the cumulative earnings approach. Under this approach, all distributions received by the investor are deemed to be returns on the investment unless the cumulative distributions exceed the cumulative equity in earnings recognized by the investor. The excess distributions are deemed to be returns of the investment and are classified as investing cash flows. Following the CONE IPO, CONE Gathering LLC has a 2% general partner interest in the Partnership, while each sponsor has a 32.1% limited partner interest. CNX Gas Company accounts for its portion of the earnings in the Partnership under the equity method of accounting. At December 31, 2014, CNX Gas Company and Noble Energy each continue to own a 50% interest in the assets of CONE Gathering LLC that were not contributed to the Partnership. During the years ended December 31, 2014 and 2013, CONE Gathering LLC (prior to September 30, 2014) and the Partnership (after September 30, 2014) provided gathering services to CNX Gas Company in the ordinary course of business totaling $65,584 and $35,765 respectively. These costs were included in Exploration and Production Costs - Transportation, Gathering and Compression on CONSOL Energy’s accompanying Consolidated Statements of Income. At December 31, 2014 and December 31, 2013, CONSOL Energy had a net payable of $21,535 and $5,448 respectively, due to both the Partnership and CONE Gathering LLC primarily for accrued but unpaid gathering services.

NOTE 27—RELATED PARTY TRANSACTIONS

On September 30 2011, CNX Gas Company and Noble Energy, Inc. (Noble Energy), an unrelated third party and joint venture partner, formed CONE Gathering LLC to develop and operate each company's gas gathering system needs in the Marcellus Shale play. CONSOL Energy accounts for CNX Gas Company's 50% ownership interest in CONE Gathering LLC under the equity method of accounting.

On May 30, 2014, CONE Gathering LLC formed CONE Midstream Partners, LP (the Partnership). On September 30, 2014, CONE Gathering LLC contributed certain assets and liabilities to the Partnership, which closed on an initial public offering of 20,125,000 of its common units at a per unit price of $22.00, which included a 2,625,000 common unit over-allotment option that was exercised in full by the underwriters (the CONE IPO). The Partnership received net proceeds of $413,005 in connection with the CONE IPO, which is net of underwriting discounts, commissions, structuring fees and other offering expense of $29,745. The Partnership distributed $203,986 of the net proceeds from the CONE IPO to CNX Gas Company, which CONSOL Energy recorded as a return on equity investments within cash flows from operating activities and as a net investment in equity affiliates within cash flows from investing activities, pursuant to the cumulative earnings approach. Under this approach, all distributions received by the investor are deemed to be returns on the investment unless the cumulative distributions exceed the cumulative equity in earnings recognized by the investor. The excess distributions are deemed to be returns of the investment and are classified as investing cash flows.

Following the CONE IPO, CONE Gathering LLC has a 2% general partner interest in the Partnership, while each sponsor has a 32.1% limited partner interest. CNX Gas Company accounts for its portion of the earnings in the Partnership under the equity method of accounting. At December 31, 2014, CNX Gas Company and Noble Energy each continue to own a 50% interest in the assets of CONE Gathering LLC that were not contributed to the Partnership.

During the years ended December 31, 2014 and 2013, CONE Gathering LLC (prior to September 30, 2014) and the Partnership (after September 30, 2014) provided gathering services to CNX Gas Company in the ordinary course of business totaling $65,584 and $35,765 respectively. These costs were included in Exploration and Production Costs - Transportation, Gathering and Compression on CONSOL Energy’s accompanying Consolidated Statements of Income. At December 31, 2014 and December 31, 2013, CONSOL Energy had a net payable of $21,535 and $5,448 respectively, due to both the Partnership and CONE Gathering LLC primarily for accrued but unpaid gathering services.