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NON-WHOLLY OWNED SUBSIDIARIES - Summarized Cash Flow Activities (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | $ 4,653 | $ 4,078 | $ 3,131
Cash flow activities, investing | (6,901) | (12,990) | (3,365)
Cash from financing activities | 2,612 | 9,419 | 56
U.K. regulated distribution operation |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | 282 | 226 | 293
Cash flow activities, investing | (439) | (487) | (432)
Cash from financing activities | 113 | 309 | 101
Brazilian regulated gas transmission operation |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | 585 | 739 | 783
Cash flow activities, investing | (178) | (36) | (80)
Cash from financing activities | (158) | (742) | (824)
Colombian natural gas distribution operation |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | 93 | 89 | 154
Cash flow activities, investing | (39) | (38) | (32)
Cash from financing activities | (49) | (78) | (99)
Brazil electricity transmission operation |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | 29 | 23 | 90
Cash flow activities, investing | 25 | 37 | (58)
Cash from financing activities | (23) | (51) | (120)
North American residential decarbonization infrastructure business |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | 128 | 33 | (116)
Cash flow activities, investing | (160) | (2,647) | (352)
Cash from financing activities | 70 | 2,671 | 480
Indian gas transmission operation |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | 196 | 134 | 132
Cash flow activities, investing | (170) | 86 | 5
Cash from financing activities | 28 | (122) | (123)
European residential decarbonization infrastructure business |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | 140 | (3) | (25)
Cash flow activities, investing | (168) | (2,365) | (35)
Cash from financing activities | 30 | 2,489 | 71
North American rail operation |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | 526 | 528 | 515
Cash flow activities, investing | (422) | (296) | (250)
Cash from financing activities | (95) | (259) | (210)
U.K. port operation |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | 54 | 16 | 31
Cash flow activities, investing | (42) | (51) | (61)
Cash from financing activities | 2 | 25 | 42
Australian port operation |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | 17 | 6 | 26
Cash flow activities, investing | 59 | 226 | (44)
Cash from financing activities | (72) | (229) | (3)
Global intermodal logistics operation |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | 1,133 | 327 |
Cash flow activities, investing | (600) | (3,048) |
Cash from financing activities | (532) | 2,828 |
Canadian diversified midstream operation |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | 504 | 542 | 568
Cash flow activities, investing | (562) | (285) | (713)
Cash from financing activities | (81) | (95) | 144
North American gas storage operation |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | 313 | 219 | 61
Cash flow activities, investing | (60) | 56 | (37)
Cash from financing activities | (191) | (228) | (26)
Canadian natural gas gathering and processing operation |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | 211 | 170 | 197
Cash flow activities, investing | (172) | (164) | (68)
Cash from financing activities | (16) | (12) | (153)
U.S. colocation data center operation |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | 256 | (13) | (5)
Cash flow activities, investing | (1,547) | (85) | (300)
Cash from financing activities | 1,451 | 93 | 318
Australian data center operation |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | (8) | 5 | 5
Cash flow activities, investing | (106) | (72) | (131)
Cash from financing activities | 110 | 69 | 114
Indian telecom tower operation |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | 465 | 608 | 315
Cash flow activities, investing | (1,744) | (767) | (243)
Cash from financing activities | 1,261 | 255 | (28)
European hyperscale data center platform |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | (11) | 54 |
Cash flow activities, investing | (697) | (2,993) |
Cash from financing activities | 794 | 2,993 |
Holding LP and other |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating | (380) | 269 | (132)
Cash flow activities, investing | 174 | (629) | (310)
Cash from financing activities | $ 202 | $ 152 | 362
Indian toll roads |  |  |
Disclosure of subsidiaries [line items] |  |  |
Cash flow activities, operating |  |  | 51
Cash flow activities, investing |  |  | (15)
Cash from financing activities |  |  | $ (26)

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