XML 153 R82.htm IDEA: XBRL DOCUMENT v2.4.1.9

Mine Closing, Reclamation, and Gas Well Closing (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
MINE CLOSING, RECLAMATION & GAS WELL CLOSING [Abstract]
Asset Retirement Obligation, Period Increase (Decrease)	$ (9,221)us-gaap_AssetRetirementObligationPeriodIncreaseDecrease
Asset Retirement Obligation [Roll Forward]
Asset Retirement Obligation, Beginning of Period	600,875,000us-gaap_AssetRetirementObligation	539,177,000us-gaap_AssetRetirementObligation
Accretion Expense	42,608,000us-gaap_AccretionExpense	41,909,000us-gaap_AccretionExpense
Asset Retirement Obligation, Cash Paid to Settle	(52,339,000)us-gaap_AssetRetirementObligationCashPaidToSettle	(38,198,000)us-gaap_AssetRetirementObligationCashPaidToSettle
Asset Retirement Obligation, Revision of Estimate	(2,069,000)us-gaap_AssetRetirementObligationRevisionOfEstimate	42,558,000us-gaap_AssetRetirementObligationRevisionOfEstimate
Asset Retirement Obligation, Other Change	(13,546,000)cnx_AssetRetirementObligationOtherChange	15,429,000cnx_AssetRetirementObligationOtherChange
Asset Retirement Obligations, Significant Changes		-4325
Asset Retirement Obligation, End of Period	$ 575,529,000us-gaap_AssetRetirementObligation	$ 600,875,000us-gaap_AssetRetirementObligation

X

- Definition

Asset Retirement Obligation, Other Change

+ References

No definition available.

+ Details

Name:	cnx_AssetRetirementObligationOtherChange
Namespace Prefix:	cnx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	cnx_AssetRetirementObligationRollForward
Namespace Prefix:	cnx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	cnx_MineClosingReclamationGasWellClosingAbstract
Namespace Prefix:	cnx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6392676&loc=d3e7480-110848



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section 35

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6394232&loc=d3e17558-110866

+ Details

Name:	us-gaap_AccretionExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Asset Retirement Obligation

-URI http://asc.fasb.org/extlink&oid=6505190

+ Details

Name:	us-gaap_AssetRetirementObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of cash paid during the period to settle an asset retirement obligation. Amounts paid to settle an asset retirement obligation are generally included in the operating section of the Statement of Cash Flows.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 17

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3367-108585

+ Details

Name:	us-gaap_AssetRetirementObligationCashPaidToSettle
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Net Increase or Decrease in the asset retirement obligation during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

+ Details

Name:	us-gaap_AssetRetirementObligationPeriodIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of the Increase or Decrease in the amount of the asset retirement obligation during the current period for changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)(4)

-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

+ Details

Name:	us-gaap_AssetRetirementObligationRevisionOfEstimate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Description of the significant increases or decreases in the carrying amount of the asset retirement obligation during the period, such as changes in significant assumptions used to calculate the carrying amount of the asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

+ Details

Name:	us-gaap_AssetRetirementObligationsSignificantChanges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration