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SUBSIDIARIES (Details)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Nov. 30, 2022
Australian rail operation      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 100.00% 100.00%  
U.K. regulated distribution operation      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 80.00% 80.00%  
Voting interest (%) 80.00% 80.00%  
Brazilian regulated gas transmission operation      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 31.00% 31.00%  
Voting interest (%) 92.00% 92.00%  
Colombian natural gas distribution operation      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 21.00% 21.00%  
Voting interest (%) 75.00% 75.00%  
Brazilian electricity transmission operation(2),(3)      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 31.00% 0.00%  
Voting interest (%) 100.00% 0.00%  
Disposal of ownership interest, percentage     31.00%
European residential infrastructure operation      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 13.00% 11.00%  
Voting interest (%) 55.00% 51.00%  
North American residential decarbonization infrastructure business      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 26.00% 26.00%  
Voting interest (%) 100.00% 100.00%  
North American residential decarbonization infrastructure business      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 26.00% 0.00%  
Voting interest (%) 100.00% 0.00%  
European residential decarbonization infrastructure business      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 25.00% 0.00%  
Voting interest (%) 100.00% 0.00%  
Indian gas transmission operation      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 21.00% 21.00%  
Voting interest (%) 100.00% 100.00%  
North American rail operation      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 9.00% 9.00%  
Voting interest (%) 100.00% 100.00%  
U.K. ports operation      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 59.00% 59.00%  
Voting interest (%) 100.00% 100.00%  
Australian port operation      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 27.00% 27.00%  
Voting interest (%) 100.00% 100.00%  
Peruvian toll roads      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 17.00% 17.00%  
Voting interest (%) 57.00% 57.00%  
Global intermodal logistics operation      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 28.00% 0.00%  
Voting interest (%) 100.00% 0.00%  
North American gas storage - Warwick Gas Storage L.P.      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 25.00% 25.00%  
Voting interest (%) 100.00% 100.00%  
North American gas storage operation - Lodi Gas Storage      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 40.00% 40.00%  
Voting interest (%) 100.00% 100.00%  
North American gas storage operation - Rockpoint Gas Storage Partners L.P.      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 40.00% 40.00%  
Voting interest (%) 100.00% 100.00%  
Canadian diversified midstream operation      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 56.00% 56.00%  
Voting interest (%) 100.00% 100.00%  
Canadian natural gas gathering and processing operation      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 29.00% 29.00%  
Voting interest (%) 100.00% 100.00%  
U.S. colocation data center operation      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 29.00% 29.00%  
Voting interest (%) 100.00% 100.00%  
Australian data center operation      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 29.00% 29.00%  
Voting interest (%) 100.00% 100.00%  
Indian Telecom Towers Operation      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 16.00% 17.00%  
Voting interest (%) 100.00% 100.00%  
Indian Telecom Towers Operation, Crest Digitel Private Limited      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 16.00% 17.00%  
Voting interest (%) 100.00% 100.00%  
U.K. wireless infrastructure operation      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 24.00% 24.00%  
Voting interest (%) 100.00% 100.00%  
European hyperscale data center platform      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 19.00% 0.00%  
Voting interest (%) 100.00% 0.00%  
Holding LP      
Disclosure of subsidiaries [line items]      
Proportion of ownership interest in subsidiary 70.00% 70.00%  
Voting interest (%) 100.00% 100.00%