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NON-WHOLLY OWNED SUBSIDIARIES - Summarized Statement of Operations (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of subsidiaries [line items]      
Revenues $ 17,931 $ 14,427 $ 11,537
Net income (loss) attributable to partnership 432 407 1,093
U.K. regulated distribution operation      
Disclosure of subsidiaries [line items]      
Revenues 635 572 569
Attributable to non-controlling interest, net income (loss) 19 19 34
Attributable to non-controlling interest, other comprehensive income (loss) 38 (20) 6
Net income (loss) attributable to partnership 78 75 138
Attributable to unitholders, other comprehensive income (loss) 154 (78) 26
Brazilian regulated gas transmission operation      
Disclosure of subsidiaries [line items]      
Revenues 1,483 1,314 1,074
Attributable to non-controlling interest, net income (loss) 455 506 361
Attributable to non-controlling interest, other comprehensive income (loss) 44 (2) (87)
Net income (loss) attributable to partnership 202 225 150
Attributable to unitholders, other comprehensive income (loss) 19 (1) (31)
Colombian natural gas distribution operation      
Disclosure of subsidiaries [line items]      
Revenues 997 901  
Attributable to non-controlling interest, net income (loss) 53 47  
Attributable to non-controlling interest, other comprehensive income (loss) 104 (23)  
Net income (loss) attributable to partnership 10 10  
Attributable to unitholders, other comprehensive income (loss) 24 (4)  
Brazil electricity transmission operation      
Disclosure of subsidiaries [line items]      
Revenues 38 224  
Attributable to non-controlling interest, net income (loss) 16 67  
Attributable to non-controlling interest, other comprehensive income (loss) 7 29  
Net income (loss) attributable to partnership 7 21  
Attributable to unitholders, other comprehensive income (loss) 3 22  
North American residential decarbonization infrastructure business      
Disclosure of subsidiaries [line items]      
Revenues   1,695  
Attributable to non-controlling interest, net income (loss)   89  
Attributable to non-controlling interest, other comprehensive income (loss)   23  
Net income (loss) attributable to partnership   36  
Attributable to unitholders, other comprehensive income (loss)   9  
Indian gas transmission operation      
Disclosure of subsidiaries [line items]      
Revenues 407 337  
Attributable to non-controlling interest, net income (loss) 83 51  
Attributable to non-controlling interest, other comprehensive income (loss) (4) (56)  
Net income (loss) attributable to partnership 22 14  
Attributable to unitholders, other comprehensive income (loss) (1) (15)  
North American rail operation      
Disclosure of subsidiaries [line items]      
Revenues 2,257 2,253 2,157
Attributable to non-controlling interest, net income (loss) 166 196 208
Attributable to non-controlling interest, other comprehensive income (loss) 190 202 131
Net income (loss) attributable to partnership 20 23 24
Attributable to unitholders, other comprehensive income (loss) 14 21 13
U.K. ports operation      
Disclosure of subsidiaries [line items]      
Revenues 272 272  
Attributable to non-controlling interest, net income (loss) 9 6  
Attributable to non-controlling interest, other comprehensive income (loss) 12 (15)  
Net income (loss) attributable to partnership 14 8  
Attributable to unitholders, other comprehensive income (loss) 12 (21)  
Australian port operation      
Disclosure of subsidiaries [line items]      
Revenues 460    
Attributable to non-controlling interest, net income (loss) 20    
Attributable to non-controlling interest, other comprehensive income (loss) (2)    
Net income (loss) attributable to partnership 7    
Attributable to unitholders, other comprehensive income (loss) (1)    
Peruvian toll roads      
Disclosure of subsidiaries [line items]      
Revenues 145 111 96
Attributable to non-controlling interest, net income (loss) 31 15 6
Attributable to non-controlling interest, other comprehensive income (loss) 17 28 (57)
Net income (loss) attributable to partnership 6 3 1
Attributable to unitholders, other comprehensive income (loss) 3 6 (11)
Indian toll roads(3)      
Disclosure of subsidiaries [line items]      
Revenues   143 117
Attributable to non-controlling interest, net income (loss)   1 (25)
Attributable to non-controlling interest, other comprehensive income (loss)   (22) (6)
Net income (loss) attributable to partnership   4 (9)
Attributable to unitholders, other comprehensive income (loss)   (11) (3)
Canadian diversified midstream operation      
Disclosure of subsidiaries [line items]      
Revenues 3,338 3,150 906
Attributable to non-controlling interest, net income (loss) 15 115 59
Attributable to non-controlling interest, other comprehensive income (loss) 56 (163) 38
Net income (loss) attributable to partnership 19 160 65
Attributable to unitholders, other comprehensive income (loss) 72 (239) 30
North American gas storage operation      
Disclosure of subsidiaries [line items]      
Revenues 321 246 371
Attributable to non-controlling interest, net income (loss) 5 64 95
Attributable to non-controlling interest, other comprehensive income (loss) 160 43 36
Net income (loss) attributable to partnership 2 45 65
Attributable to unitholders, other comprehensive income (loss) 103 38 22
U.S. colocation data center operation      
Disclosure of subsidiaries [line items]      
Revenues 207 221 249
Attributable to non-controlling interest, net income (loss) (87) (75) (33)
Attributable to non-controlling interest, other comprehensive income (loss) (6) 28 13
Net income (loss) attributable to partnership (35) (30) (13)
Attributable to unitholders, other comprehensive income (loss) (2) 11 5
Australian data center operation      
Disclosure of subsidiaries [line items]      
Revenues 31 22 23
Attributable to non-controlling interest, net income (loss) (3) 3 3
Attributable to non-controlling interest, other comprehensive income (loss) 1 (9) (8)
Net income (loss) attributable to partnership (1) 2 1
Attributable to unitholders, other comprehensive income (loss) 0 (4) (3)
Indian Telecom Towers Operation      
Disclosure of subsidiaries [line items]      
Revenues 1,471    
Attributable to non-controlling interest, net income (loss) 19    
Attributable to non-controlling interest, other comprehensive income (loss) (16)    
Net income (loss) attributable to partnership 6    
Attributable to unitholders, other comprehensive income (loss) (3)    
Holding LP and other      
Disclosure of subsidiaries [line items]      
Revenues 4 6  
Attributable to non-controlling interest, net income (loss) (171) (106)  
Attributable to non-controlling interest, other comprehensive income (loss) 0 0  
Net income (loss) attributable to partnership (583) (244)  
Attributable to unitholders, other comprehensive income (loss) (85) 300  
Canadian district energy operation      
Disclosure of subsidiaries [line items]      
Revenues     72
Attributable to non-controlling interest, net income (loss)     9
Attributable to non-controlling interest, other comprehensive income (loss)     35
Net income (loss) attributable to partnership     3
Attributable to unitholders, other comprehensive income (loss)     8
Indian gas transmission operation      
Disclosure of subsidiaries [line items]      
Revenues     342
Attributable to non-controlling interest, net income (loss)     35
Attributable to non-controlling interest, other comprehensive income (loss)     (17)
Net income (loss) attributable to partnership     13
Attributable to unitholders, other comprehensive income (loss)     (5)
Colombian natural gas distribution operation      
Disclosure of subsidiaries [line items]      
Revenues     862
Attributable to non-controlling interest, net income (loss)     34
Attributable to non-controlling interest, other comprehensive income (loss)     (101)
Net income (loss) attributable to partnership     8
Attributable to unitholders, other comprehensive income (loss)     (24)
Brazilian transmission operation      
Disclosure of subsidiaries [line items]      
Revenues     90
Attributable to non-controlling interest, net income (loss)     22
Attributable to non-controlling interest, other comprehensive income (loss)     (6)
Net income (loss) attributable to partnership     10
Attributable to unitholders, other comprehensive income (loss)     (2)
U.K. port operation      
Disclosure of subsidiaries [line items]      
Revenues     274
Attributable to non-controlling interest, net income (loss)     17
Attributable to non-controlling interest, other comprehensive income (loss)     6
Net income (loss) attributable to partnership     24
Attributable to unitholders, other comprehensive income (loss)     9
Australian port operation      
Disclosure of subsidiaries [line items]      
Revenues   458 412
Attributable to non-controlling interest, net income (loss)   (27) (16)
Attributable to non-controlling interest, other comprehensive income (loss)   (21) (18)
Net income (loss) attributable to partnership   (10) (6)
Attributable to unitholders, other comprehensive income (loss)   (8) (6)
Chilean toll roads      
Disclosure of subsidiaries [line items]      
Revenues     138
Attributable to non-controlling interest, net income (loss)     (40)
Attributable to non-controlling interest, other comprehensive income (loss)     53
Net income (loss) attributable to partnership     (8)
Attributable to unitholders, other comprehensive income (loss)     13
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
North American residential decarbonization infrastructure business      
Disclosure of subsidiaries [line items]      
Revenues     1,444
Attributable to non-controlling interest, net income (loss)     75
Attributable to non-controlling interest, other comprehensive income (loss)     43
Net income (loss) attributable to partnership     32
Attributable to unitholders, other comprehensive income (loss)     18
Indian telecom tower operation      
Disclosure of subsidiaries [line items]      
Revenues   1,398 1,257
Attributable to non-controlling interest, net income (loss)   (7) 1
Attributable to non-controlling interest, other comprehensive income (loss)   (201) (80)
Net income (loss) attributable to partnership   2 0
Attributable to unitholders, other comprehensive income (loss)   (41) (16)
Holding LP      
Disclosure of subsidiaries [line items]      
Revenues     5
Attributable to non-controlling interest, net income (loss)     742
Attributable to non-controlling interest, other comprehensive income (loss)     0
Net income (loss) attributable to partnership     450
Attributable to unitholders, other comprehensive income (loss)     194
Global intermodal logistics operation      
Disclosure of subsidiaries [line items]      
Revenues 385    
Attributable to non-controlling interest, net income (loss) 56    
Attributable to non-controlling interest, other comprehensive income (loss) (33)    
Net income (loss) attributable to partnership 22    
Attributable to unitholders, other comprehensive income (loss) (13)    
European hyperscale data center platform      
Disclosure of subsidiaries [line items]      
Revenues 170    
Attributable to non-controlling interest, net income (loss) 56    
Attributable to non-controlling interest, other comprehensive income (loss) (106)    
Net income (loss) attributable to partnership 13    
Attributable to unitholders, other comprehensive income (loss) (24)    
North American residential decarbonization infrastructure business      
Disclosure of subsidiaries [line items]      
Revenues 2,759    
Attributable to non-controlling interest, net income (loss) 57    
Attributable to non-controlling interest, other comprehensive income (loss) (31)    
Net income (loss) attributable to partnership 20    
Attributable to unitholders, other comprehensive income (loss) (11)    
European residential decarbonization infrastructure business      
Disclosure of subsidiaries [line items]      
Revenues 1,539 190 91
Attributable to non-controlling interest, net income (loss) (2) (19) (6)
Attributable to non-controlling interest, other comprehensive income (loss) 69 (18) (8)
Net income (loss) attributable to partnership 0 (3) (1)
Attributable to unitholders, other comprehensive income (loss) $ 22 $ (3) $ (1)