v3.26.3
FAIR VALUE MEASUREMENTS - MinnTac Option (Details) - Commodity Option - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative instrument, percentage of interest in commodity option 25.00%  
Derivative asset $ 500  
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]    
Beginning balance as of January 1 54 $ 95
Total expense included in earnings (37) (34)
Foreign currency translation (1) 4
Ending balance as of September 30 $ 16 $ 65