v3.26.3
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, 2026
MMBbls
Bcf
Dec. 31, 2025
Bcf
MMBbls
- Natural gas (Bcf) | Sold / Receiver | Fixed price | Derivatives designated as hedging instruments:    
Derivative [Line Items]    
Derivative, nonmonetary notional amount, volume 23.8 19.4
- Natural gas (Bcf) | Sold / Receiver | Fixed price | Derivatives not designated as hedging instruments:    
Derivative [Line Items]    
Derivative, nonmonetary notional amount, volume 5.1 4.1
- Natural gas (Bcf) | Sold / Receiver | Basis | Derivatives designated as hedging instruments:    
Derivative [Line Items]    
Derivative, nonmonetary notional amount, volume 24.2 17.9
- Natural gas (Bcf) | Sold / Receiver | Basis | Derivatives not designated as hedging instruments:    
Derivative [Line Items]    
Derivative, nonmonetary notional amount, volume 0.3 0.2
- Natural gas (Bcf) | Sold / Receiver | Swing Swaps | Derivatives not designated as hedging instruments:    
Derivative [Line Items]    
Derivative, nonmonetary notional amount, volume   0.6
- Natural gas (Bcf) | Purchased / Payor | Swing Swaps | Derivatives not designated as hedging instruments:    
Derivative [Line Items]    
Derivative, nonmonetary notional amount, volume 2.2  
- 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 18.9 22.1
- 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 0  
- NGLs, Refined Products and crude oil (MMBbl) | Sold / Receiver | Basis | Derivatives designated as hedging instruments:    
Derivative [Line Items]    
Derivative, nonmonetary notional amount, volume | MMBbls   0.6
- NGLs, Refined Products and crude oil (MMBbl) | Purchased / Payor | Fixed price | Derivatives not designated as hedging instruments:    
Derivative [Line Items]    
Derivative, nonmonetary notional amount, volume | MMBbls   0.1
- NGLs, Refined Products and crude oil (MMBbl) | Purchased / Payor | Basis | Derivatives designated as hedging instruments:    
Derivative [Line Items]    
Derivative, nonmonetary notional amount, volume | MMBbls 2.6