DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Additional Information (Details) MMBTU in Thousands, £ in Millions, $ in Millions	3 Months Ended	6 Months Ended
Mar. 31, 2021 USD ($)	Jun. 30, 2022 GBP (£) $ / MMBTU MMBTU Counterparty
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of derivative counterparties \| Counterparty		12
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized gain in connection with contracts \| $	$ 147
Basis Swap Purchased \| July—September 2023 \| NYMEX Henry Hub/IF Waha \| Natural gas revenues
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount (in MMBtu) \| MMBTU		1,840
Weighted Average Price Differential		(1.62)
Basis Swap Sold \| July—September 2023 \| NYMEX Henry Hub/IF HSC \| Natural gas revenues
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, nonmonetary notional amount (in MMBtu) \| MMBTU		1,840
Weighted Average Price Differential		(0.19)
Foreign currency derivative instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, notional amount \| £		£ 15
Derivative, weighted average floor price (USD per MMBtu)		1.29
Derivative, weighted average ceiling price (USD per MMBtu)		1.39

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- Definition

Derivative, Weighted Average Price Differential

+ References

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- Definition

The average cap rate on a group of price risk derivatives such as caps or collars. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract.

+ References

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The average floor rate on a group of price risk derivatives such as floors or collars. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.

+ References

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- Definition

Amount of increase in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959

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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.

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- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

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