Annual report [Section 13 and 15(d), not S-K Item 405]

DERIVATIVE INSTRUMENTS AND HEDGING - Narrative (Details)

v3.25.4
DERIVATIVE INSTRUMENTS AND HEDGING - Narrative (Details)
$ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
MMBtu
MWh
Dec. 31, 2024
MWh
MMBtu
Not Designated as Hedging Instrument    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Loss on derivative $ (29)  
Commodity Contract    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Expected reclassification of net losses related to hedge contracts $ (19)  
Commodity Contract | Natural Gas    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Notional Amount | MMBtu 139,300,000 143,250,000
Commodity Contract | Electricity    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Notional Amount | MWh 1,974,380 3,224,227
Cash-Settled Sales Swaps    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Expected reclassification of net losses related to hedge contracts $ (7)  
Cash-Settled Sales Swaps | HRC    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Notional Amount | MWh 220,220 0