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NON-WHOLLY OWNED SUBSIDIARIES - Summarized Statement of Operations (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Nov. 16, 2021
Jun. 07, 2021
Dec. 07, 2020
Disclosure of subsidiaries [line items]            
Revenues $ 14,427 $ 11,537 $ 8,885      
Net income (loss) attributable to partnership 407 1,093 394      
U.K. regulated distribution operation            
Disclosure of subsidiaries [line items]            
Revenues 572 569 488      
Attributable to non-controlling interest, net income (loss) 19 34 11      
Attributable to non-controlling interest, other comprehensive income (loss) (20) 6 42      
Net income (loss) attributable to partnership 75 138 46      
Attributable to unitholders, other comprehensive income (loss) (78) 26 167      
Brazilian regulated gas transmission operation            
Disclosure of subsidiaries [line items]            
Revenues 1,314 1,074 942      
Attributable to non-controlling interest, net income (loss) 506 361 309      
Attributable to non-controlling interest, other comprehensive income (loss) (2) (87) (399)      
Net income (loss) attributable to partnership 225 150 116      
Attributable to unitholders, other comprehensive income (loss) (1) (31) (152)      
Colombian natural gas distribution operation            
Disclosure of subsidiaries [line items]            
Revenues 901 862        
Attributable to non-controlling interest, net income (loss) 47 34        
Attributable to non-controlling interest, other comprehensive income (loss) (23) (101)        
Net income (loss) attributable to partnership 10 8        
Attributable to unitholders, other comprehensive income (loss) (4) (24)        
Brazil electricity transmission operation            
Disclosure of subsidiaries [line items]            
Revenues 224 90        
Attributable to non-controlling interest, net income (loss) 67 22        
Attributable to non-controlling interest, other comprehensive income (loss) 29 (6)        
Net income (loss) attributable to partnership 21 10        
Attributable to unitholders, other comprehensive income (loss) 22 (2)        
North American residential infrastructure business            
Disclosure of subsidiaries [line items]            
Revenues 1,695 1,444        
Attributable to non-controlling interest, net income (loss) 89 75        
Attributable to non-controlling interest, other comprehensive income (loss) 23 43        
Net income (loss) attributable to partnership 36 32        
Attributable to unitholders, other comprehensive income (loss) 9 18        
Indian gas transmission operation            
Disclosure of subsidiaries [line items]            
Revenues 337          
Attributable to non-controlling interest, net income (loss) 51          
Attributable to non-controlling interest, other comprehensive income (loss) (56)          
Net income (loss) attributable to partnership 14          
Attributable to unitholders, other comprehensive income (loss) (15)          
UK residential infrastructure business            
Disclosure of subsidiaries [line items]            
Revenues 84 2        
Attributable to non-controlling interest, net income (loss) (4) 0        
Attributable to non-controlling interest, other comprehensive income (loss) (11) 0        
Net income (loss) attributable to partnership (1) 0        
Attributable to unitholders, other comprehensive income (loss) (2) 0        
European residential infrastructure business            
Disclosure of subsidiaries [line items]            
Revenues 106 89        
Attributable to non-controlling interest, net income (loss) (15) (6)        
Attributable to non-controlling interest, other comprehensive income (loss) (7) (8)        
Net income (loss) attributable to partnership (2) (1)        
Attributable to unitholders, other comprehensive income (loss) (1) (1)        
North American rail operation            
Disclosure of subsidiaries [line items]            
Revenues 2,253 2,157 1,974      
Attributable to non-controlling interest, net income (loss) 196 208 86      
Attributable to non-controlling interest, other comprehensive income (loss) 202 131 (153)      
Net income (loss) attributable to partnership 23 24 11      
Attributable to unitholders, other comprehensive income (loss) 21 13 (16)      
U.K. ports operation            
Disclosure of subsidiaries [line items]            
Revenues 272 274        
Attributable to non-controlling interest, net income (loss) 6 17        
Attributable to non-controlling interest, other comprehensive income (loss) (15) 6        
Net income (loss) attributable to partnership 8 24        
Attributable to unitholders, other comprehensive income (loss) (21) 9        
Australian port operation            
Disclosure of subsidiaries [line items]            
Revenues 458          
Attributable to non-controlling interest, net income (loss) (27)          
Attributable to non-controlling interest, other comprehensive income (loss) (21)          
Net income (loss) attributable to partnership (10)          
Attributable to unitholders, other comprehensive income (loss) (8)          
Peruvian toll roads            
Disclosure of subsidiaries [line items]            
Revenues 111 96 81      
Attributable to non-controlling interest, net income (loss) 15 6 7      
Attributable to non-controlling interest, other comprehensive income (loss) 28 (57) (54)      
Net income (loss) attributable to partnership 3 1 1      
Attributable to unitholders, other comprehensive income (loss) 6 (11) (11)      
Indian toll roads            
Disclosure of subsidiaries [line items]            
Revenues 143 117 111      
Attributable to non-controlling interest, net income (loss) 1 (25) (24)      
Attributable to non-controlling interest, other comprehensive income (loss) (22) (6) (4)      
Net income (loss) attributable to partnership 4 (9) (8)      
Attributable to unitholders, other comprehensive income (loss) (11) (3) (2)      
North American gas storage operation            
Disclosure of subsidiaries [line items]            
Revenues 246 371 143      
Attributable to non-controlling interest, net income (loss) 64 95 (10)      
Attributable to non-controlling interest, other comprehensive income (loss) 43 36 10      
Net income (loss) attributable to partnership 45 65 (7)      
Attributable to unitholders, other comprehensive income (loss) 38 22 6      
Canadian diversified midstream operation            
Disclosure of subsidiaries [line items]            
Revenues 3,150 906        
Attributable to non-controlling interest, net income (loss) 115 59        
Attributable to non-controlling interest, other comprehensive income (loss) (163) 38        
Net income (loss) attributable to partnership 160 65        
Attributable to unitholders, other comprehensive income (loss) (239) 30        
North American data center operation            
Disclosure of subsidiaries [line items]            
Revenues 221 249 273      
Attributable to non-controlling interest, net income (loss) (75) (33) (32)      
Attributable to non-controlling interest, other comprehensive income (loss) 28 13 (10)      
Net income (loss) attributable to partnership (30) (13) (13)      
Attributable to unitholders, other comprehensive income (loss) 11 5 (4)      
Australian data center operation            
Disclosure of subsidiaries [line items]            
Revenues 22 23 24      
Attributable to non-controlling interest, net income (loss) 3 3 4      
Attributable to non-controlling interest, other comprehensive income (loss) (9) (8) 12      
Net income (loss) attributable to partnership 2 1 1      
Attributable to unitholders, other comprehensive income (loss) (4) (3) 5      
U.K. telecom towers operation            
Disclosure of subsidiaries [line items]            
Revenues 57 59        
Attributable to non-controlling interest, net income (loss) (5) (19)        
Attributable to non-controlling interest, other comprehensive income (loss) (18) (1)        
Net income (loss) attributable to partnership (2) (6)        
Attributable to unitholders, other comprehensive income (loss) (5) 0        
Indian Telecom Towers Operation            
Disclosure of subsidiaries [line items]            
Revenues 1,398          
Attributable to non-controlling interest, net income (loss) (7)          
Attributable to non-controlling interest, other comprehensive income (loss) (201)          
Net income (loss) attributable to partnership 2          
Attributable to unitholders, other comprehensive income (loss) (41)          
U.S. fiber business            
Disclosure of subsidiaries [line items]            
Revenues 0          
Attributable to non-controlling interest, net income (loss) (4)          
Attributable to non-controlling interest, other comprehensive income (loss) 0          
Net income (loss) attributable to partnership (1)          
Attributable to unitholders, other comprehensive income (loss) 0          
Holding LP and other            
Disclosure of subsidiaries [line items]            
Revenues 6 5        
Attributable to non-controlling interest, net income (loss) (106) 742        
Attributable to non-controlling interest, other comprehensive income (loss) 0 0        
Net income (loss) attributable to partnership (244) 450        
Attributable to unitholders, other comprehensive income (loss) $ 300 194        
Canadian district energy operation            
Disclosure of subsidiaries [line items]            
Revenues   72 127      
Attributable to non-controlling interest, net income (loss)   9 5      
Attributable to non-controlling interest, other comprehensive income (loss)   35 115      
Net income (loss) attributable to partnership   3 2      
Attributable to unitholders, other comprehensive income (loss)   8 39      
Disposal of ownership interest, percentage         25.00%  
U.S. district energy operation            
Disclosure of subsidiaries [line items]            
Revenues   74        
Attributable to non-controlling interest, net income (loss)   2        
Attributable to non-controlling interest, other comprehensive income (loss)   0        
Net income (loss) attributable to partnership   0        
Attributable to unitholders, other comprehensive income (loss)   0        
Disposal of ownership interest, percentage         40.00%  
Indian gas transmission operation            
Disclosure of subsidiaries [line items]            
Revenues   342 268      
Attributable to non-controlling interest, net income (loss)   35 (61)      
Attributable to non-controlling interest, other comprehensive income (loss)   (17) (23)      
Net income (loss) attributable to partnership   13 (19)      
Attributable to unitholders, other comprehensive income (loss)   (5) (7)      
Colombian regulated distribution operation            
Disclosure of subsidiaries [line items]            
Revenues     6      
Attributable to non-controlling interest, net income (loss)     2      
Attributable to non-controlling interest, other comprehensive income (loss)     156      
Net income (loss) attributable to partnership     0      
Attributable to unitholders, other comprehensive income (loss)     (6)      
Colombian natural gas distribution operation            
Disclosure of subsidiaries [line items]            
Revenues     793      
Attributable to non-controlling interest, net income (loss)     39      
Attributable to non-controlling interest, other comprehensive income (loss)     34      
Net income (loss) attributable to partnership     7      
Attributable to unitholders, other comprehensive income (loss)     13      
Brazilian transmission operation            
Disclosure of subsidiaries [line items]            
Revenues     40      
Attributable to non-controlling interest, net income (loss)     9      
Attributable to non-controlling interest, other comprehensive income (loss)     (25)      
Net income (loss) attributable to partnership     4      
Attributable to unitholders, other comprehensive income (loss)     (11)      
Australian export terminal            
Disclosure of subsidiaries [line items]            
Revenues     297      
Attributable to non-controlling interest, net income (loss)     163      
Attributable to non-controlling interest, other comprehensive income (loss)     35      
Net income (loss) attributable to partnership     54      
Attributable to unitholders, other comprehensive income (loss)     16      
Disposal of ownership interest, percentage           22.00%
U.K. port operation            
Disclosure of subsidiaries [line items]            
Revenues     235      
Attributable to non-controlling interest, net income (loss)     22      
Attributable to non-controlling interest, other comprehensive income (loss)     16      
Net income (loss) attributable to partnership     31      
Attributable to unitholders, other comprehensive income (loss)     22      
Australian port operation            
Disclosure of subsidiaries [line items]            
Revenues   412 381      
Attributable to non-controlling interest, net income (loss)   (16) (29)      
Attributable to non-controlling interest, other comprehensive income (loss)   (18) 40      
Net income (loss) attributable to partnership   (6) (10)      
Attributable to unitholders, other comprehensive income (loss)   (6) 14      
Chilean toll roads            
Disclosure of subsidiaries [line items]            
Revenues   138 116      
Attributable to non-controlling interest, net income (loss)   (40) (21)      
Attributable to non-controlling interest, other comprehensive income (loss)   53 (21)      
Net income (loss) attributable to partnership   (8) (6)      
Attributable to unitholders, other comprehensive income (loss)   13 2      
Disposal of ownership interest, percentage       17.00%    
U.S. district energy operation            
Disclosure of subsidiaries [line items]            
Revenues     137      
Attributable to non-controlling interest, net income (loss)     (14)      
Attributable to non-controlling interest, other comprehensive income (loss)     58      
Net income (loss) attributable to partnership     (9)      
Attributable to unitholders, other comprehensive income (loss)     38      
North American residential infrastructure business            
Disclosure of subsidiaries [line items]            
Revenues     1,274      
Attributable to non-controlling interest, net income (loss)     70      
Attributable to non-controlling interest, other comprehensive income (loss)     (32)      
Net income (loss) attributable to partnership     29      
Attributable to unitholders, other comprehensive income (loss)     (14)      
U.K. telecom towers operation            
Disclosure of subsidiaries [line items]            
Revenues     51      
Attributable to non-controlling interest, net income (loss)     (3)      
Attributable to non-controlling interest, other comprehensive income (loss)     5      
Net income (loss) attributable to partnership     (1)      
Attributable to unitholders, other comprehensive income (loss)     2      
Indian telecom tower operation            
Disclosure of subsidiaries [line items]            
Revenues   1,257 360      
Attributable to non-controlling interest, net income (loss)   1 5      
Attributable to non-controlling interest, other comprehensive income (loss)   (80) 69      
Net income (loss) attributable to partnership   0 3      
Attributable to unitholders, other comprehensive income (loss)   $ (16) 14      
Holding LP            
Disclosure of subsidiaries [line items]            
Revenues     9      
Attributable to non-controlling interest, net income (loss)     (57)      
Attributable to non-controlling interest, other comprehensive income (loss)     0      
Net income (loss) attributable to partnership     (7)      
Attributable to unitholders, other comprehensive income (loss)     $ 250