Quarterly report [Sections 13 or 15(d)]

VARIABLE INTEREST ENTITIES (Details)

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VARIABLE INTEREST ENTITIES (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Variable Interest Entity [Line Items]      
Net Income (Loss) Attributable to Noncontrolling Interest $ 8 $ 12  
Cash paid for capital expenditures including deposits 152 152  
Inventories 4,591   $ 4,772
Property, plant and equipment, net 9,345   9,481
Accounts payable (2,011)   (1,893)
Noncontrolling interests (197)   (207)
SunCoke Middletown | Variable Interest Entity, Primary Beneficiary      
Variable Interest Entity [Line Items]      
Net Income (Loss) Attributable to Noncontrolling Interest 9 15  
Cash paid for capital expenditures including deposits 1 $ 0  
Inventories 27   27
Property, plant and equipment, net 269   273
Accounts payable (22)   (20)
Other assets (liabilities), net (66)   (61)
Noncontrolling interests $ (208)   $ (219)