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RISK-MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES - Schedule of Notional Quantities for Derivative Instruments (Details) - Futures and Swaps	9 Months Ended	12 Months Ended
	Sep. 30, 2025 Bcf MMBbls	Dec. 31, 2024 MMBbls Bcf
- Natural gas (Bcf) | Sold / Receiver | Fixed price | Derivatives designated as hedging instruments:
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume	17.2	12.2
- Natural gas (Bcf) | Sold / Receiver | Fixed price | Derivatives not designated as hedging instruments:
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume		8.0
- Natural gas (Bcf) | Sold / Receiver | Basis | Derivatives designated as hedging instruments:
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume	10.0	11.2
- Natural gas (Bcf) | Sold / Receiver | Basis | Derivatives not designated as hedging instruments:
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume		3.7
- Natural gas (Bcf) | Sold / Receiver | Swing Swaps | Derivatives not designated as hedging instruments:
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume	0.7	0.2
- Natural gas (Bcf) | Purchased / Payor | Fixed price | Derivatives not designated as hedging instruments:
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume	1.2
- Natural gas (Bcf) | Purchased / Payor | Basis | Derivatives not designated as hedging instruments:
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume	4.6
- NGLs, Refined Products and crude oil (MMBbl) | Sold / Receiver | Fixed price | Derivatives designated as hedging instruments:
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume | MMBbls	20.8	12.2
- NGLs, Refined Products and crude oil (MMBbl) | Sold / Receiver | Fixed price | Derivatives not designated as hedging instruments:
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume | MMBbls	1.3	2.7
- NGLs, Refined Products and crude oil (MMBbl) | Sold / Receiver | Basis | Derivatives not designated as hedging instruments:
Derivative [Line Items]
Derivative, nonmonetary notional amount, volume | MMBbls	0.5	0.2

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- 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480237/815-40-50-5

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- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 181
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-181

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