Quarterly report [Sections 13 or 15(d)]

DERIVATIVE INSTRUMENTS AND HEDGING (Details)

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DERIVATIVE INSTRUMENTS AND HEDGING (Details)
$ in Millions
3 Months Ended
Mar. 31, 2026
USD ($)
MWh
Tons
MMBtu
Dec. 31, 2025
Tons
MWh
MMBtu
Commodity Contract    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Reclassification of net losses $ (10)  
Commodity Contract | Natural Gas    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Notional Amount | MMBtu 137,225,000 139,300,000
Commodity Contract | Electricity    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Notional Amount | MWh 1,868,208 1,974,380
Commodity Contract | HRC    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Notional Amount | Tons 375,300 220,220
Cash-Settled Sales Swaps    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Reclassification of net losses $ (40)