v3.26.1
REVENUE (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disaggregation of Revenue [Line Items]    
Transmission and other services $ 433 $ 397
Other services    
Disaggregation of Revenue [Line Items]    
Transmission and other services   $ 1