XML 72 R61.htm IDEA: XBRL DOCUMENT v3.26.1

COMMITMENTS AND CONTINGENT LIABILITIES - Schedule of Amount of Commitment Expiration Per Period (Details) $ in Thousands	Mar. 31, 2026 USD ($)
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	$ 335,776
Less Than 1 Year
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	321,272
1-3 Years
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	6,414
3-5 Years
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	590
Beyond 5 Years
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Indefinite
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	7,500
Letters of Credit | Firm Transportation
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	25,077
Letters of Credit | Other
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	2,920
Letters of Credit | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	27,997
Letters of Credit | Less Than 1 Year | Firm Transportation
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	25,077
Letters of Credit | Less Than 1 Year | Other
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	2,920
Letters of Credit | Less Than 1 Year | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	27,997
Letters of Credit | 1-3 Years | Firm Transportation
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Letters of Credit | 1-3 Years | Other
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Letters of Credit | 1-3 Years | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Letters of Credit | 3-5 Years | Firm Transportation
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Letters of Credit | 3-5 Years | Other
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Letters of Credit | 3-5 Years | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Letters of Credit | Beyond 5 Years | Firm Transportation
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Letters of Credit | Beyond 5 Years | Other
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Letters of Credit | Beyond 5 Years | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Letters of Credit | Indefinite | Firm Transportation
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Letters of Credit | Indefinite | Other
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Letters of Credit | Indefinite | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | Firm Transportation
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	129,336
Surety Bond | Other
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	12,873
Surety Bond | Employee-Related
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	2,250
Surety Bond | Environmental
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	47,947
Surety Bond | Financial Guarantees
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	90,162
Surety Bond | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	282,568
Surety Bond | Less Than 1 Year | Firm Transportation
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	129,336
Surety Bond | Less Than 1 Year | Other
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	12,873
Surety Bond | Less Than 1 Year | Employee-Related
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	2,250
Surety Bond | Less Than 1 Year | Environmental
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	47,947
Surety Bond | Less Than 1 Year | Financial Guarantees
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	90,162
Surety Bond | Less Than 1 Year | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	282,568
Surety Bond | 1-3 Years | Firm Transportation
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | 1-3 Years | Other
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | 1-3 Years | Employee-Related
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | 1-3 Years | Environmental
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | 1-3 Years | Financial Guarantees
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | 1-3 Years | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | 3-5 Years | Firm Transportation
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | 3-5 Years | Other
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | 3-5 Years | Employee-Related
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | 3-5 Years | Environmental
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | 3-5 Years | Financial Guarantees
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | 3-5 Years | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | Beyond 5 Years | Firm Transportation
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | Beyond 5 Years | Other
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | Beyond 5 Years | Employee-Related
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | Beyond 5 Years | Environmental
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | Beyond 5 Years | Financial Guarantees
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | Beyond 5 Years | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | Indefinite | Firm Transportation
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | Indefinite | Other
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | Indefinite | Employee-Related
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | Indefinite | Environmental
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | Indefinite | Financial Guarantees
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Surety Bond | Indefinite | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Other Guarantees | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	25,211
Other Guarantees | Less Than 1 Year | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	10,707
Other Guarantees | 1-3 Years | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	6,414
Other Guarantees | 3-5 Years | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	590
Other Guarantees | Beyond 5 Years | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	0
Other Guarantees | Indefinite | Loss Contingencies by Secondary Nature of Contingency
Schedule of Costs Related to Purchase Obligations [Line Items]
Total Commitments	$ 7,500

X

- Definition

Schedule of Costs Related to Purchase Obligations [Line Items]

+ References

No definition available.

+ Details

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

X

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

+ Details

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

X

- Details

Name:	us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=cnx_BalanceOnFirstAnniversaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=cnx_MoreThanOneAndWithinThreeYearsFromBalanceSheetDateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=cnx_MoreThanThreeAndWithinFiveYearsFromBalanceSheetDateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=cnx_BeyondFiveYearsOfBalanceSheetDateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=cnx_IndefiniteFromBalanceSheetDateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_OtherCommitmentsAxis=cnx_FirmTransportationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_OtherCommitmentsAxis=cnx_OtherCommitmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_OtherCommitmentsAxis=cnx_LossContingenciesbySecondaryNatureofContingencyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_SuretyBondMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_OtherCommitmentsAxis=cnx_EmployeeRelatedCommitmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_OtherCommitmentsAxis=cnx_EnvironmentRelatedCommitmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_OtherCommitmentsAxis=us-gaap_FinancialGuaranteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_GuaranteeObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: