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REVENUE FROM CONTRACTS WITH CUSTOMERS - Narrative (Details)	12 Months Ended
	Dec. 31, 2024
Revenue from Contract with Customer [Abstract]
Payment terms for contract with customers (in days)	25 days

X

- Definition

Contracts With Customers, Payment Terms

+ References

No definition available.

+ Details

Name:	cnx_ContractsWithCustomersPaymentTerms
Namespace Prefix:	cnx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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