v3.26.1
SEGMENT REPORTING - Summary of Assets by Segment (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Segment Reporting, Asset Reconciling Item [Line Items]    
Total assets $ 20,115 $ 20,012
Steelmaking    
Segment Reporting, Asset Reconciling Item [Line Items]    
Total assets 19,525 19,416
Other Businesses    
Segment Reporting, Asset Reconciling Item [Line Items]    
Total assets $ 590 $ 596