Credit Facility, Debt Covenant, Secured Leverage Ratio

No definition available.

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- Definition

Debt Instrument, Borrowing Base

+ References

No definition available.

+ Details

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Namespace Prefix:	cnx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Interest Coverage Ratio

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Interest Ratio per Credit Facility Covenant

+ References

No definition available.

+ Details

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- Definition

Letters Of Credit, Amount Outstanding

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Letters Of Credit, Maximum Borrowing Capacity

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line Of Credit Facility, Availability Under Credit Facility, Percentage Of Aggregate Commitments

+ References

No definition available.

+ Details

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Namespace Prefix:	cnx_
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Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Maximum Borrowing Capacity, Accordion Feature

+ References

No definition available.

+ Details

Name:	cnx_LineofCreditFacilityMaximumBorrowingCapacityAccordionFeature
Namespace Prefix:	cnx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

minimum current ratio per credit facility

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
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+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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+ Details

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

- Definition

The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for a specific purpose other than for financing goods acquired for inventory or imminent delivery to a customer.

+ References

No definition available.

+ Details

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

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Revolving Credit Facilities (Details)	12 Months Ended
Revolving Credit Facilities (Details)	Dec. 31, 2021 USD ($)	Oct. 06, 2021 USD ($)	Apr. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	Nov. 30, 2020 USD ($)	Oct. 31, 2020 USD ($)	Apr. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Apr. 30, 2019 USD ($)
Short-term Debt [Line Items]
Debt instrument, face amount							$ 1,000
Federal Funds Open Rate
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	0.50%
Federal Funds Open Rate \| CNXM
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	0.50%
One-Month LIBOR
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	1.00%
One-Month LIBOR \| CNXM
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	1.00%
One-Month LIBOR \| Minimum
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	0.75%
One-Month LIBOR \| Minimum \| CNXM
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	1.00%
One-Month LIBOR \| Maximum
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	1.75%
One-Month LIBOR \| Maximum \| CNXM
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	2.00%
LIBOR \| Minimum
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	1.75%
LIBOR \| Minimum \| CNXM
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	2.00%
LIBOR \| Maximum
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	2.75%
LIBOR \| Maximum \| CNXM
Short-term Debt [Line Items]
Basis spread on variable rate (as a percent)	3.00%
Senior Notes due in January 2029 \| Debt Instrument, Issuance, Period Two
Short-term Debt [Line Items]
Debt instrument, face amount				$ 500,000,000
Stated rate, debt instrument				6.00%
Convertible 2.25% Senior Notes Due 2026 \| Convertible Debt
Short-term Debt [Line Items]
Debt instrument, face amount							$ 345,000,000
Stated rate, debt instrument							2.25%
Revolving Credit Facility
Short-term Debt [Line Items]
Debt instrument, face amount								$ 160,000,000
Maximum borrowing capacity		$ 2,000,000,000			$ 1,775,000,000
Initial borrowing base		2,000,000,000	$ 1,775,000,000		$ 1,775,000,000	$ 1,900,000,000
Elected commitments		1,300,000,000
Percentage of aggregate commitments available under credit facility	20.00%
Maximum net leverage ratio	3.50
Minimum current ratio	1.00
Borrowings outstanding	$ 192,000,000			$ 160,800,000
Letters of credit outstanding	184,131,000			185,272,000
Borrowings and issuance of letters of credit remaining capacity	923,869,000			1,428,928,000
Revolving Credit Facility \| CNXM
Short-term Debt [Line Items]
Maximum borrowing capacity		$ 600,000,000							$ 600,000,000
Borrowings outstanding	185,000,000			291,000,000
Letters of credit outstanding	$ 30,000			30,000
Increase in available borrowings									250,000,000
Letters of credit, maximum borrowing capacity									$ 100,000,000
Interest coverage ratio	2.50
Current borrowing capacity	$ 414,970,000			$ 308,970,000
Revolving Credit Facility \| Minimum \| CNXM
Short-term Debt [Line Items]
Maximum net leverage ratio	5.00
Revolving Credit Facility \| Maximum \| CNXM
Short-term Debt [Line Items]
Maximum net leverage ratio	5.25
Secured leverage ratio	3.25