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Segment Information | 12 Months Ended
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Dec. 31, 2016
Segment Reporting [Abstract] |
Segment Reporting Disclosure [Text Block] | SEGMENT INFORMATION: CONSOL Energy consists of two principal business divisions: Exploration and Production (E&P) and Pennsylvania (PA) Mining Operations. The principal activity of the E&P division, which includes four reportable segments, is to produce pipeline quality natural gas for sale primarily to gas wholesalers. The E&P division's reportable segments are Marcellus Shale, Utica Shale, Coalbed Methane, and Other Gas. The Other Gas segment is primarily related to shallow oil and gas production and the Chattanooga Shale in Tennessee, neither of which are significant to the Company. It also includes the Company's purchased gas activities, unrealized gain or loss on commodity derivative instruments, exploration and production related other costs, other corporate expenses, selling, general and administrative activities, as well as various other activities assigned to the E&P division but not allocated to each individual segment. The principal activities of the PA Mining Operations division are mining, preparation and marketing of thermal coal, sold primarily to power generators. It also includes selling, general and administrative activities, as well as various other activities assigned to the PA Mining Operations division. CONSOL Energy’s Other division includes expenses from various corporate and diversified business activities that are not allocated to the E&P or PA Mining Operations divisions. The diversified business activities include coal terminal operations, closed and idle mine activities, water operations, selling, general and administrative activities, as well as various other non-operated activities, none of which are individually significant to the Company. In previous periods, this division included activity from the sales of industrial supplies (this subsidiary was sold in December 2014). Prior to the sale of the Buchanan Mine on March 31, 2016 and the Fola and Miller Creek Complexes on August 1, 2016 (see Note 2 - Discontinued Operations), CONSOL Energy had a Coal division. The Coal division had three reportable segments; PA Operations, Virginia (VA) Operations and Other Coal. The VA Operations segment included the Buchanan Mine and the Other Coal segment was primarily comprised of the assets and operations of the Fola and Miller Creek Complexes, as well as coal terminal operations, closed and idle mine activities, selling, general and administrative activities and various other non-operated activities. PA Operations now constitutes its own division and reportable segment and the remaining activity in the Other Coal segment became part of CONSOL Energy's diversified business activities in the Other division. Prior periods have been reclassified to align with current period presentation. In the preparation of the following information, intersegment sales have been recorded at amounts approximating market. Operating profit for each segment is based on sales less identifiable operating and non-operating expenses. Assets are reflected at the division level for E&P and are not allocated between each individual E&P segment. These assets are not allocated to each individual segment due to the diverse asset base controlled by CONSOL Energy, whereby each individual asset may service more than one segment within the division. An allocation of such asset base would not be meaningful or representative on a segment by segment basis.
Reconciliation Of Assets And Liabilities From Segment To Consolidated [Text Block] | Reconciliation of Segment Information to Consolidated Amounts: Revenue and Other Income:
|  | For the Years Ended December 31,
|  | 2016 |  | 2015 |  | 2014
Total Segment Sales and Freight from External Customers |  | $ | 1,980,592 |  |  | $ | 2,081,873 |  |  | $ | 2,930,172 |
(Loss) Gain on Commodity Derivative Instruments |  | (141,021 | ) |  | 392,942 |  |  | 23,193 |
Other Income not Allocated to Segments (Note 4) |  | 167,306 |  |  | 144,351 |  |  | 207,460 |
Gain on Sale of Assets |  | 19,498 |  |  | 74,173 |  |  | 43,198 |
Total Consolidated Revenue and Other Income |  | $ | 2,026,375 |  |  | $ | 2,693,339 |  |  | $ | 3,204,023 |
(Loss) Earnings From Continuing Operations Before Income Tax:
|  | For the Years Ended December 31,
|  | 2016 |  | 2015 |  | 2014
Segment (Loss) Income Before Income Taxes for reportable business segments |  | $ | (248,132 | ) |  | $ | (273,863 | ) |  | $ | 620,682 |
Segment (Loss) Income Before Income Taxes for all other business segments |  | (85,923 | ) |  | 66,713 |  |  | (119,473 | )
Interest expense |  | (191,476 | ) |  | (199,266 | ) |  | (223,333 | )
Eliminations |  | (424 | ) |  | (1,538 | ) |  | (2,458 | )
Loss on debt extinguishment |  | — |  |  | (67,751 | ) |  | (95,267 | )
(Loss) Earnings From Continuing Operations Before Income Tax |  | $ | (525,955 | ) |  | $ | (475,705 | ) |  | $ | 180,151 |
Total Assets:
|  | December 31,
| 2016 |  | 2015
Segment assets for total reportable business segments |  | $ | 8,217,774 |  |  | $ | 8,968,585 |
Segment assets for all other business segments |  | 797,830 |  |  | 859,675 |
Items excluded from segment assets: |  |  |  |
Cash and other investments |  | 47,153 |  |  | 65,935 |
Recoverable income taxes |  | 116,851 |  |  | 13,887 |
Deferred tax assets |  | 4,290 |  |  | — |
Discontinued Operations |  | 83 |  |  | 1,021,820 |
Total Consolidated Assets |  | $ | 9,183,981 |  |  | $ | 10,929,902 |
Enterprise-Wide Disclosures: CONSOL Energy's Revenues by geographical location (I):
|  | For the Years Ended December 31,
|  | 2016 |  | 2015 |  | 2014
United States |  | $ | 1,799,336 |  |  | $ | 1,822,452 |  |  | $ | 2,713,833 |
Asia |  | 109,312 |  |  | 106,954 |  |  | 66,912 |
Europe |  | 40,704 |  |  | 112,844 |  |  | 121,909 |
South America |  | 25,406 |  |  | 28,060 |  |  | 19,013 |
Canada |  | 5,834 |  |  | 11,563 |  |  | 8,505 |
Total Revenues and Freight from External Customers (J) |  | $ | 1,980,592 |  |  | $ | 2,081,873 |  |  | $ | 2,930,172 |
_________________________ (I) CONSOL Energy attributes revenue to individual countries based on the location of the customer. (J) CONSOL Energy has contractual relationships with certain U.S. based customers who distribute coal to international markets. The table above reflects the ultimate destination of CONSOL Energy coal. CONSOL Energy's Property, Plant and Equipment by geographical location:
|  | December 31,
|  | 2016 |  | 2015
United States |  | $ | 8,129,415 |  |  | $ | 8,721,682 |
Canada |  | 11,024 |  |  | 11,024 |
Discontinued Operations |  | — |  |  | 936,671 |
Total Property, Plant and Equipment, net |  | $ | 8,140,439 |  |  | $ | 9,669,377 |
Segment Information | Industry segment results for the year ended December 31, 2016 are:
| Marcellus Shale |  | Utica Shale |  | Coalbed Methane |  | Other Gas |  | Total E&P |  | PA Mining Operations |  | Other |  | Adjustments and Eliminations |  | Consolidated |
Sales—Outside | $ | 414,484 |  |  | $ | 163,112 |  |  | $ | 174,323 |  |  | $ | 41,329 |  |  | $ | 793,248 |  |  | $ | 1,065,582 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,858,830 |  |
Gain (Loss) on Commodity Derivative Instruments | 147,282 |  |  | 29,285 |  |  | 52,396 |  |  | (369,984 | ) |  | (141,021 | ) |  | — |  |  | — |  |  | — |  |  | (141,021 | ) |
Other Outside Sales | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 32,038 |  |  | — |  |  | 32,038 |  |
Sales—Purchased Gas | — |  |  | — |  |  | — |  |  | 43,256 |  |  | 43,256 |  |  | — |  |  | — |  |  | — |  |  | 43,256 |  |
Freight—Outside | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 46,468 |  |  | — |  |  | — |  |  | 46,468 |  |
Intersegment Transfers | — |  |  | — |  |  | 424 |  |  | — |  |  | 424 |  |  | — |  |  | — |  |  | (424 | ) |  | — |  |
Total Sales and Freight | $ | 561,766 |  |  | $ | 192,397 |  |  | $ | 227,143 |  |  | $ | (285,399 | ) |  | $ | 695,907 |  |  | $ | 1,112,050 |  |  | $ | 32,038 |  |  | $ | (424 | ) |  | $ | 1,839,571 |  |
Earnings (Loss) From Continuing Operations Before Income Tax | $ | 72,141 |  |  | $ | 28,390 |  |  | $ | 37,999 |  |  | $ | (517,370 | ) |  | $ | (378,840 | ) |  | $ | 130,708 |  |  | $ | (277,399 | ) |  | $ | (424 | ) |  | $ | (525,955 | ) | (A)
Segment Assets |  |  |  |  |  |  |  |  | $ | 6,235,568 |  |  | $ | 1,982,206 |  |  | $ | 966,124 |  |  | $ | 83 |  |  | $ | 9,183,981 |  | (B)
Depreciation, Depletion and Amortization |  |  |  |  |  |  |  |  | $ | 417,853 |  |  | $ | 168,195 |  |  | $ | 12,455 |  |  | $ | — |  |  | $ | 598,503 |  |
Capital Expenditures |  |  |  |  |  |  |  |  | $ | 165,101 |  |  | $ | 50,809 |  |  | $ | 10,910 |  |  | $ | — |  |  | $ | 226,820 |  |
(A) | Includes equity in earnings of unconsolidated affiliates of $51,742 and $1,336 for Total E&P and Other, respectively.
(B) | Includes investments in unconsolidated equity affiliates of $188,376 and $2,588 for Total E&P and Other, respectively.
Industry segment results for the year ended December 31, 2015 are:
| Marcellus Shale |  | Utica Shale |  | Coalbed Methane |  | Other Gas |  | Total E&P |  | PA Mining Operations |  | Other |  | Adjustments and Eliminations |  | Consolidated |
Sales—Outside | $ | 379,453 |  |  | $ | 92,223 |  |  | $ | 200,645 |  |  | $ | 54,600 |  |  | $ | 726,921 |  |  | $ | 1,289,036 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,015,957 |  | (C)
Gain on Commodity Derivative Instruments | 100,785 |  |  | 6,430 |  |  | 67,281 |  |  | 218,446 |  |  | 392,942 |  |  | — |  |  | — |  |  | — |  |  | 392,942 |  |
Other Outside Sales | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 30,967 |  |  | — |  |  | 30,967 |  |
Sales—Purchased Gas | — |  |  | — |  |  | — |  |  | 14,450 |  |  | 14,450 |  |  | — |  |  | — |  |  | — |  |  | 14,450 |  |
Freight—Outside | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 20,499 |  |  | — |  |  | — |  |  | 20,499 |  |
Intersegment Transfers | — |  |  | — |  |  | 1,538 |  |  | — |  |  | 1,538 |  |  | — |  |  | — |  |  | (1,538 | ) |  | — |  |
Total Sales and Freight | $ | 480,238 |  |  | $ | 98,653 |  |  | $ | 269,464 |  |  | $ | 287,496 |  |  | $ | 1,135,851 |  |  | $ | 1,309,535 |  |  | $ | 30,967 |  |  | $ | (1,538 | ) |  | $ | 2,474,815 |  |
Earnings (Loss) From Continuing Operations Before Income Tax | $ | 56,116 |  |  | $ | (19,428 | ) |  | $ | 59,662 |  |  | $ | (775,207 | ) |  | $ | (678,857 | ) |  | $ | 404,994 |  |  | $ | (200,304 | ) |  | $ | (1,538 | ) |  | $ | (475,705 | ) | (D)
Segment Assets |  |  |  |  |  |  |  |  | $ | 6,892,284 |  |  | $ | 2,076,301 |  |  | $ | 939,497 |  |  | $ | 1,021,820 |  |  | $ | 10,929,902 |  | (E)
Depreciation, Depletion and Amortization |  |  |  |  |  |  |  |  | $ | 370,374 |  |  | $ | 176,864 |  |  | $ | 19,882 |  |  | $ | — |  |  | $ | 567,120 |  |
Capital Expenditures |  |  |  |  |  |  |  |  | $ | 832,446 |  |  | $ | 136,291 |  |  | $ | 14,197 |  |  | $ | — |  |  | $ | 982,934 |  |
(C) | Included in the PA Mining Operations segment are sales of $242,020 to Duke Energy, which comprises over 10% of sales.
(D) | Includes equity in earnings of unconsolidated affiliates of $46,614 and $8,283 for Total E&P and Other, respectively.
(E) | Includes investments in unconsolidated equity affiliates of $234,803 and $2,527 for Total E&P and Other, respectively.
Industry segment results for the year ended December 31, 2014 are:
| Marcellus Shale |  | Utica Shale |  | Coalbed Methane |  | Other Gas |  | Total E&P |  | PA Mining Operations |  | Other |  | Adjustments and Eliminations |  | Consolidated |
Sales—Outside | $ | 457,679 |  |  | $ | 86,948 |  |  | $ | 340,739 |  |  | $ | 119,558 |  |  | $ | 1,004,924 |  |  | $ | 1,616,874 |  |  | $ | — |  |  | $ | — |  |  | $ | 2,621,798 |  | (F)
Gain on Commodity Derivative Instruments | 14,764 |  |  | 1,247 |  |  | 4,103 |  |  | 3,079 |  |  | 23,193 |  |  | — |  |  | — |  |  | — |  |  | 23,193 |  |
Other Outside Sales | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 276,242 |  |  | — |  |  | 276,242 |  |
Sales—Purchased Gas | — |  |  | — |  |  | — |  |  | 8,999 |  |  | 8,999 |  |  | — |  |  | — |  |  | — |  |  | 8,999 |  |
Freight—Outside | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 23,133 |  |  | — |  |  | — |  |  | 23,133 |  |
Intersegment Transfers | — |  |  | — |  |  | 2,458 |  |  | — |  |  | 2,458 |  |  | — |  |  | 78,229 |  |  | (80,687 | ) |  | — |  |
Total Sales and Freight | $ | 472,443 |  |  | $ | 88,195 |  |  | $ | 347,300 |  |  | $ | 131,636 |  |  | $ | 1,039,574 |  |  | $ | 1,640,007 |  |  | $ | 354,471 |  |  | $ | (80,687 | ) |  | $ | 2,953,365 |  |
Earnings (Loss) From Continuing Operations Before Income Tax | $ | 171,902 |  |  | $ | 43,645 |  |  | $ | 108,107 |  |  | $ | (133,940 | ) |  | $ | 189,714 |  |  | $ | 430,968 |  |  | $ | (438,073 | ) |  | $ | (2,458 | ) |  | $ | 180,151 |  | (G)
Segment Assets |  |  |  |  |  |  |  |  | $ | 7,364,185 |  |  | $ | 2,094,041 |  |  | $ | 1,186,874 |  |  | $ | 1,009,546 |  |  | $ | 11,654,646 |  | (H)
Depreciation, Depletion and Amortization |  |  |  |  |  |  |  |  | $ | 323,600 |  |  | $ | 173,316 |  |  | $ | 35,727 |  |  | $ | — |  |  | $ | 532,643 |  |
Capital Expenditures |  |  |  |  |  |  |  |  | $ | 1,103,656 |  |  | $ | 341,229 |  |  | $ | 14,567 |  |  | $ | — |  |  | $ | 1,459,452 |  |
(F) Included in the Total E&P segment are sales of $295,779 to NJR Energy Services Company, which comprises over 10% of sales. (G) Includes equity in earnings of unconsolidated affiliates of $32,217 and $17,574 for Total E&P and Other, respectively. (H) Includes investments in unconsolidated equity affiliates of $121,721 and $31,237 for Total E&P and Other, respectively.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8981-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9038-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8971-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8595-108599 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8380-108599 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8844-108599 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8984-108599 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9031-108599 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9054-108599 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8538-108599 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8864-108599 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8924-108599 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8906-108599 + Details
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