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SUBSIDIARIES (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
U.K. regulated distribution operation      
Disclosure of subsidiaries [line items]      
Effective Ownership Interest (%) 80.00% 80.00% 80.00%
Voting Interest (%) 80.00% 80.00% 80.00%
Brazil Regulated Gas Transmission Operation      
Disclosure of subsidiaries [line items]      
Effective Ownership Interest (%) 31.00% 28.00% 28.00%
Voting Interest (%) 92.00% 90.00% 90.00%