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INTANGIBLE ASSETS - Cash Generating Units (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Disclosure of information for cash-generating units [line items]    
Total $ 15,845 $ 11,822
Brazilian regulated gas transmission operation    
Disclosure of information for cash-generating units [line items]    
Total 2,970 2,816
Canadian diversified midstream operation    
Disclosure of information for cash-generating units [line items]    
Total 2,050 2,186
North American rail operation    
Disclosure of information for cash-generating units [line items]    
Total 1,732 1,762
European residential decarbonization infrastructure business    
Disclosure of information for cash-generating units [line items]    
Total 1,198 0
North American residential decarbonization infrastructure operation    
Disclosure of information for cash-generating units [line items]    
Total 3,267 1,674
Peruvian toll roads    
Disclosure of information for cash-generating units [line items]    
Total 1,066 1,031
Indian Telecom Towers Operation    
Disclosure of information for cash-generating units [line items]    
Total 652 682
U.K. wireless infrastructure operation    
Disclosure of information for cash-generating units [line items]    
Total 563 537
U.K. ports operation    
Disclosure of information for cash-generating units [line items]    
Total 272 258
Brazil electricity transmission operation    
Disclosure of information for cash-generating units [line items]    
Total 505 0
Other    
Disclosure of information for cash-generating units [line items]    
Total 866 876
Global intermodal logistics operation    
Disclosure of information for cash-generating units [line items]    
Total $ 704 $ 0