v3.26.1
REVENUE - Schedule of Revenues by Service Line (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Disclosure of operating segments [line items]        
Revenues $ 940 $ 866 $ 1,824 $ 1,795
Gas Transmission        
Disclosure of operating segments [line items]        
Revenues 375 353 706 696
Leasing        
Disclosure of operating segments [line items]        
Revenues 317 308 634 697
Distribution        
Disclosure of operating segments [line items]        
Revenues 171 137 343 278
Connections        
Disclosure of operating segments [line items]        
Revenues 69 54 126 101
Other        
Disclosure of operating segments [line items]        
Revenues $ 8 $ 14 $ 15 $ 23