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NON-WHOLLY OWNED SUBSIDIARIES - Summarized Statement of Operations (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of subsidiaries [line items]      
Revenues $ 21,039 $ 17,931 $ 14,427
Net income (loss) attributable to partnership 391 432 407
U.K. regulated distribution operation      
Disclosure of subsidiaries [line items]      
Revenues 741 635 572
Attributable to non-controlling interest, net income (loss) 20 19 19
Attributable to non-controlling interest, other comprehensive income (loss) 11 38 (20)
Net income (loss) attributable to partnership 78 78 75
Attributable to unitholders, other comprehensive income (loss) 45 154 (78)
Brazilian regulated gas transmission operation      
Disclosure of subsidiaries [line items]      
Revenues 1,357 1,483 1,314
Attributable to non-controlling interest, net income (loss) 318 455 506
Attributable to non-controlling interest, other comprehensive income (loss) 102 44 (2)
Net income (loss) attributable to partnership 135 202 225
Attributable to unitholders, other comprehensive income (loss) 59 19 (1)
Colombian natural gas distribution operation      
Disclosure of subsidiaries [line items]      
Revenues 1,153 997  
Attributable to non-controlling interest, net income (loss) 63 53  
Attributable to non-controlling interest, other comprehensive income (loss) (64) 104  
Net income (loss) attributable to partnership 13 10  
Attributable to unitholders, other comprehensive income (loss) (14) 24  
Brazil electricity transmission operation      
Disclosure of subsidiaries [line items]      
Revenues 57 38  
Attributable to non-controlling interest, net income (loss) 17 16  
Attributable to non-controlling interest, other comprehensive income (loss) (34) 7  
Net income (loss) attributable to partnership 8 7  
Attributable to unitholders, other comprehensive income (loss) (15) 3  
North American residential decarbonization infrastructure operation      
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)  
Indian gas transmission operation      
Disclosure of subsidiaries [line items]      
Revenues 488 407 337
Attributable to non-controlling interest, net income (loss) (35) 83 51
Attributable to non-controlling interest, other comprehensive income (loss) (18) (4) (56)
Net income (loss) attributable to partnership (9) 22 14
Attributable to unitholders, other comprehensive income (loss) (5) (1) (15)
European residential decarbonization infrastructure business      
Disclosure of subsidiaries [line items]      
Revenues 1,663 1,539 190
Attributable to non-controlling interest, net income (loss) (64) (2) (19)
Attributable to non-controlling interest, other comprehensive income (loss) (37) 69 (18)
Net income (loss) attributable to partnership (18) 0 (3)
Attributable to unitholders, other comprehensive income (loss) (10) 22 (3)
North American rail operation      
Disclosure of subsidiaries [line items]      
Revenues 2,360 2,257 2,253
Attributable to non-controlling interest, net income (loss) 161 166 196
Attributable to non-controlling interest, other comprehensive income (loss) (30) 190 202
Net income (loss) attributable to partnership 19 20 23
Attributable to unitholders, other comprehensive income (loss) (10) 14 21
U.K. ports operation      
Disclosure of subsidiaries [line items]      
Revenues 307 272  
Attributable to non-controlling interest, net income (loss) 5 9  
Attributable to non-controlling interest, other comprehensive income (loss) 12 12  
Net income (loss) attributable to partnership 7 14  
Attributable to unitholders, other comprehensive income (loss) 18 12  
Australian port operation      
Disclosure of subsidiaries [line items]      
Revenues 335    
Attributable to non-controlling interest, net income (loss) (19)    
Attributable to non-controlling interest, other comprehensive income (loss) (19)    
Net income (loss) attributable to partnership (7)    
Attributable to unitholders, other comprehensive income (loss) (7)    
Indian toll roads      
Disclosure of subsidiaries [line items]      
Revenues     143
Attributable to non-controlling interest, net income (loss)     1
Attributable to non-controlling interest, other comprehensive income (loss)     (22)
Net income (loss) attributable to partnership     4
Attributable to unitholders, other comprehensive income (loss)     (11)
Canadian diversified midstream operation      
Disclosure of subsidiaries [line items]      
Revenues 3,360 3,338 3,150
Attributable to non-controlling interest, net income (loss) (9) 15 115
Attributable to non-controlling interest, other comprehensive income (loss) (171) 56 (163)
Net income (loss) attributable to partnership (12) 19 160
Attributable to unitholders, other comprehensive income (loss) (214) 72 (239)
North American gas storage operation      
Disclosure of subsidiaries [line items]      
Revenues 427 321 246
Attributable to non-controlling interest, net income (loss) 110 5 64
Attributable to non-controlling interest, other comprehensive income (loss) 704 160 43
Net income (loss) attributable to partnership 69 2 45
Attributable to unitholders, other comprehensive income (loss) 445 103 38
U.S. colocation data center operation      
Disclosure of subsidiaries [line items]      
Revenues 938 207 221
Attributable to non-controlling interest, net income (loss) 357 (87) (75)
Attributable to non-controlling interest, other comprehensive income (loss) (5) (6) 28
Net income (loss) attributable to partnership 142 (35) (30)
Attributable to unitholders, other comprehensive income (loss) (2) (2) 11
Australian data center operation      
Disclosure of subsidiaries [line items]      
Revenues 30 31 22
Attributable to non-controlling interest, net income (loss) (4) (3) 3
Attributable to non-controlling interest, other comprehensive income (loss) (33) 1 (9)
Net income (loss) attributable to partnership (2) (1) 2
Attributable to unitholders, other comprehensive income (loss) (13) 0 (4)
Indian telecom tower operation      
Disclosure of subsidiaries [line items]      
Revenues 2,020    
Attributable to non-controlling interest, net income (loss) (73)    
Attributable to non-controlling interest, other comprehensive income (loss) 8    
Net income (loss) attributable to partnership (13)    
Attributable to unitholders, other comprehensive income (loss) 1    
Holding LP and other      
Disclosure of subsidiaries [line items]      
Revenues 0 4  
Attributable to non-controlling interest, net income (loss) (68) (171)  
Attributable to non-controlling interest, other comprehensive income (loss) 0 0  
Net income (loss) attributable to partnership (636) (583)  
Attributable to unitholders, other comprehensive income (loss) 170 (85)  
Colombian natural gas distribution operation      
Disclosure of subsidiaries [line items]      
Revenues     901
Attributable to non-controlling interest, net income (loss)     47
Attributable to non-controlling interest, other comprehensive income (loss)     (23)
Net income (loss) attributable to partnership     10
Attributable to unitholders, other comprehensive income (loss)     (4)
Brazilian transmission operation      
Disclosure of subsidiaries [line items]      
Revenues     224
Attributable to non-controlling interest, net income (loss)     67
Attributable to non-controlling interest, other comprehensive income (loss)     29
Net income (loss) attributable to partnership     21
Attributable to unitholders, other comprehensive income (loss)     22
U.K. port operation      
Disclosure of subsidiaries [line items]      
Revenues     272
Attributable to non-controlling interest, net income (loss)     6
Attributable to non-controlling interest, other comprehensive income (loss)     (15)
Net income (loss) attributable to partnership     8
Attributable to unitholders, other comprehensive income (loss)     (21)
Australian port operation      
Disclosure of subsidiaries [line items]      
Revenues   460 458
Attributable to non-controlling interest, net income (loss)   20 (27)
Attributable to non-controlling interest, other comprehensive income (loss)   (2) (21)
Net income (loss) attributable to partnership   7 (10)
Attributable to unitholders, other comprehensive income (loss)   (1) (8)
Indian telecom tower operation      
Disclosure of subsidiaries [line items]      
Revenues   1,471 1,398
Attributable to non-controlling interest, net income (loss)   19 (7)
Attributable to non-controlling interest, other comprehensive income (loss)   (16) (201)
Net income (loss) attributable to partnership   6 2
Attributable to unitholders, other comprehensive income (loss)   (3) (41)
Holding LP      
Disclosure of subsidiaries [line items]      
Revenues     6
Attributable to non-controlling interest, net income (loss)     (106)
Attributable to non-controlling interest, other comprehensive income (loss)     0
Net income (loss) attributable to partnership     (244)
Attributable to unitholders, other comprehensive income (loss)     300
Global intermodal logistics operation      
Disclosure of subsidiaries [line items]      
Revenues 1,568 385  
Attributable to non-controlling interest, net income (loss) 342 56  
Attributable to non-controlling interest, other comprehensive income (loss) 9 (33)  
Net income (loss) attributable to partnership 108 22  
Attributable to unitholders, other comprehensive income (loss) 4 (13)  
European hyperscale data center platform      
Disclosure of subsidiaries [line items]      
Revenues 332 170  
Attributable to non-controlling interest, net income (loss) 84 56  
Attributable to non-controlling interest, other comprehensive income (loss) (144) (106)  
Net income (loss) attributable to partnership 18 13  
Attributable to unitholders, other comprehensive income (loss) (32) (24)  
North American residential decarbonization infrastructure business      
Disclosure of subsidiaries [line items]      
Revenues 2,834   1,695
Attributable to non-controlling interest, net income (loss) 74   89
Attributable to non-controlling interest, other comprehensive income (loss) (83)   23
Net income (loss) attributable to partnership 27   36
Attributable to unitholders, other comprehensive income (loss) (29)   9
Canadian natural gas gathering and processing operation      
Disclosure of subsidiaries [line items]      
Revenues 565 547 561
Attributable to non-controlling interest, net income (loss) 6 14 32
Attributable to non-controlling interest, other comprehensive income (loss) (109) (27) (37)
Net income (loss) attributable to partnership 2 5 13
Attributable to unitholders, other comprehensive income (loss) $ (50) $ (11) $ (15)