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NON-WHOLLY OWNED SUBSIDIARIES - Summarized Statement of Financial Position (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of subsidiaries [line items]    
Current Assets $ 9,607 $ 7,979
Non-Current Assets 94,983 92,805
Current Liabilities 10,903 11,705
Non-Current Liabilities 63,834 55,063
Non-Controlling Interest in Operating Subsidiaries 1,700  
Dividend recapitalization 1,700  
U.K. regulated distribution operation    
Disclosure of subsidiaries [line items]    
Current Assets 265 312
Non-Current Assets 5,882 5,579
Current Liabilities 561 387
Non-Current Liabilities 3,725 3,744
Non-Controlling Interest in Operating Subsidiaries 365 344
Partnership capital 1,496 1,416
Brazilian regulated gas transmission operation    
Disclosure of subsidiaries [line items]    
Current Assets 871 747
Non-Current Assets 2,936 3,576
Current Liabilities 745 549
Non-Current Liabilities 3,779 3,099
Non-Controlling Interest in Operating Subsidiaries (402) 526
Partnership capital (315) 149
Colombian natural gas distribution operation    
Disclosure of subsidiaries [line items]    
Current Assets 293 257
Non-Current Assets 1,175 1,288
Current Liabilities 448 187
Non-Current Liabilities 451 709
Non-Controlling Interest in Operating Subsidiaries 495 559
Partnership capital 74 90
Brazilian electricity transmission operation    
Disclosure of subsidiaries [line items]    
Current Assets 49 19
Non-Current Assets 1,045 532
Current Liabilities 31 11
Non-Current Liabilities 708 323
Non-Controlling Interest in Operating Subsidiaries 246 150
Partnership capital 109 67
North American residential decarbonization infrastructure business    
Disclosure of subsidiaries [line items]    
Current Assets 968  
Non-Current Assets 8,603  
Current Liabilities 834  
Non-Current Liabilities 4,906  
Non-Controlling Interest in Operating Subsidiaries 2,827  
Partnership capital 1,004  
North American Residential Infrastructure Business    
Disclosure of subsidiaries [line items]    
Current Assets   926
Non-Current Assets   8,730
Current Liabilities   797
Non-Current Liabilities   5,021
Non-Controlling Interest in Operating Subsidiaries   2,832
Partnership capital   1,006
Indian gas transmission operation    
Disclosure of subsidiaries [line items]    
Current Assets 423 192
Non-Current Assets 1,415 1,562
Current Liabilities 285 937
Non-Current Liabilities 1,039 133
Non-Controlling Interest in Operating Subsidiaries 516 652
Partnership capital (2) 32
European residential decarbonization infrastructure business    
Disclosure of subsidiaries [line items]    
Current Assets 610 681
Non-Current Assets 3,585 3,581
Current Liabilities 491 491
Non-Current Liabilities 1,454 1,360
Non-Controlling Interest in Operating Subsidiaries 1,705 1,825
Partnership capital 545 586
North American rail operation    
Disclosure of subsidiaries [line items]    
Current Assets 748 686
Non-Current Assets 10,142 10,054
Current Liabilities 587 791
Non-Current Liabilities 5,867 4,866
Non-Controlling Interest in Operating Subsidiaries 3,995 4,583
Partnership capital 441 500
U.K. ports operation    
Disclosure of subsidiaries [line items]    
Current Assets 130 121
Non-Current Assets 1,261 1,239
Current Liabilities 56 70
Non-Current Liabilities 958 928
Non-Controlling Interest in Operating Subsidiaries 152 147
Partnership capital 225 215
Australian port operation    
Disclosure of subsidiaries [line items]    
Current Assets 75 102
Non-Current Assets 192 425
Current Liabilities 61 105
Non-Current Liabilities 8 115
Non-Controlling Interest in Operating Subsidiaries 137 218
Partnership capital 61 89
Global intermodal logistics operation    
Disclosure of subsidiaries [line items]    
Current Assets 2,346 435
Non-Current Assets 10,005 11,950
Current Liabilities 1,565 984
Non-Current Liabilities 6,213 6,639
Non-Controlling Interest in Operating Subsidiaries 3,512 3,597
Partnership capital 1,061 1,165
Canadian diversified midstream operation    
Disclosure of subsidiaries [line items]    
Current Assets 751 672
Non-Current Assets 12,976 14,346
Current Liabilities 1,455 1,763
Non-Current Liabilities 6,933 7,463
Non-Controlling Interest in Operating Subsidiaries 2,327 2,528
Partnership capital 3,012 3,264
North American gas storage operation    
Disclosure of subsidiaries [line items]    
Current Assets 296 283
Non-Current Assets 3,021 1,744
Current Liabilities 197 149
Non-Current Liabilities 1,642 769
Non-Controlling Interest in Operating Subsidiaries 909 677
Partnership capital 569 432
Canadian natural gas gathering and processing operation    
Disclosure of subsidiaries [line items]    
Current Assets 128 108
Non-Current Assets 3,486 3,750
Current Liabilities 169 121
Non-Current Liabilities 2,033 1,890
Non-Controlling Interest in Operating Subsidiaries 1,009 1,320
Partnership capital 403 527
U.S. colocation data center operation    
Disclosure of subsidiaries [line items]    
Current Assets 281 64
Non-Current Assets 4,463 1,459
Current Liabilities 363 197
Non-Current Liabilities 3,411 690
Non-Controlling Interest in Operating Subsidiaries 691 456
Partnership capital 279 180
Australian data center operation    
Disclosure of subsidiaries [line items]    
Current Assets 10 19
Non-Current Assets 626 589
Current Liabilities 12 18
Non-Current Liabilities 148 170
Non-Controlling Interest in Operating Subsidiaries 340 299
Partnership capital 136 121
Indian telecom tower operation    
Disclosure of subsidiaries [line items]    
Current Assets 789 807
Non-Current Assets 10,343 8,026
Current Liabilities 991 775
Non-Current Liabilities 9,890 7,299
Non-Controlling Interest in Operating Subsidiaries (75) 452
Partnership capital 326 307
European hyperscale data center platform    
Disclosure of subsidiaries [line items]    
Current Assets 357 272
Non-Current Assets 4,984 4,370
Current Liabilities 429 316
Non-Current Liabilities 2,617 1,959
Non-Controlling Interest in Operating Subsidiaries 1,879 1,920
Partnership capital 416 447
Holding LP and other    
Disclosure of subsidiaries [line items]    
Current Assets 615 939
Non-Current Assets 450 66
Current Liabilities 2,044 2,661
Non-Current Liabilities 5,795 4,680
Non-Controlling Interest in Operating Subsidiaries (364) (366)
Partnership capital $ (6,410) $ (5,970)