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NON-WHOLLY OWNED SUBSIDIARIES - Summarized Statement of Financial Position (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Disclosure of subsidiaries [line items] |  |
Current Assets | $ 4,896 | $ 3,711
Non-Current Assets | 69,065 | 57,620
Current Liabilities | 8,661 | 5,524
Non-Current Liabilities | 38,909 | 34,134
Non-Wholly Owned Subsidiaries |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 4,741 | 3,613
Non-Current Assets | 62,026 | 49,913
Current Liabilities | 8,386 | 5,317
Non-Current Liabilities | 37,451 | 32,480
Non-Controlling Interest in Operating Subsidiaries | 15,658 | 13,955
Partnership capital | 5,272 | 1,774
U.K. regulated distribution operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 249 | 181
Non-Current Assets | 4,961 | 5,264
Current Liabilities | 316 | 333
Non-Current Liabilities | 3,285 | 3,241
Non-Controlling Interest in Operating Subsidiaries | 314 | 367
Partnership capital | 1,295 | 1,504
Brazilian regulated gas transmission operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 668 | 405
Non-Current Assets | 3,115 | 3,494
Current Liabilities | 1,278 | 203
Non-Current Liabilities | 2,028 | 2,772
Non-Controlling Interest in Operating Subsidiaries | 389 | 783
Partnership capital | 88 | 141
Colombian natural gas distribution operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 219 | 220
Non-Current Assets | 1,061 | 1,256
Current Liabilities | 162 | 248
Non-Current Liabilities | 522 | 478
Non-Controlling Interest in Operating Subsidiaries | 512 | 636
Partnership capital | 84 | 114
Brazil electricity transmission operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 104 | 15
Non-Current Assets | 1,457 | 320
Current Liabilities | 30 | 11
Non-Current Liabilities | 902 | 196
Non-Controlling Interest in Operating Subsidiaries | 436 | 89
Partnership capital | 193 | 39
Canadian District Energy Operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets |  | 28
Non-Current Assets |  | 1,260
Current Liabilities |  | 147
Non-Current Liabilities |  | 567
Non-Controlling Interest in Operating Subsidiaries |  | 429
Partnership capital |  | 145
U.S. district energy operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets |  | 38
Non-Current Assets |  | 1,097
Current Liabilities |  | 78
Non-Current Liabilities |  | 768
Non-Controlling Interest in Operating Subsidiaries |  | 163
Partnership capital |  | 126
North American residential energy infrastructure operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 269 | 210
Non-Current Assets | 4,583 | 4,215
Current Liabilities | 466 | 436
Non-Current Liabilities | 2,660 | 2,321
Non-Controlling Interest in Operating Subsidiaries | 1,215 | 1,174
Partnership capital | 511 | 494
Indian gas transmission operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 154 | 94
Non-Current Assets | 2,015 | 2,172
Current Liabilities | 287 | 131
Non-Current Liabilities | 1,191 | 1,308
Non-Controlling Interest in Operating Subsidiaries | 644 | 781
Partnership capital | 47 | 46
UK Residential Infrastructure Business |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 5 |
Non-Current Assets | 151 |
Current Liabilities | 34 |
Non-Current Liabilities | 5 |
Non-Controlling Interest in Operating Subsidiaries | 99 |
Partnership capital | 18 |
European Residential Infrastructure Operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 24 |
Non-Current Assets | 213 |
Current Liabilities | 10 |
Non-Current Liabilities | 78 |
Non-Controlling Interest in Operating Subsidiaries | 132 |
Partnership capital | 17 |
North American rail operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 564 | 504
Non-Current Assets | 9,561 | 9,569
Current Liabilities | 564 | 699
Non-Current Liabilities | 4,930 | 4,898
Non-Controlling Interest in Operating Subsidiaries | 4,173 | 4,032
Partnership capital | 458 | 444
U.K. ports operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 55 | 62
Non-Current Assets | 1,154 | 1,105
Current Liabilities | 40 | 45
Non-Current Liabilities | 779 | 735
Non-Controlling Interest in Operating Subsidiaries | 159 | 157
Partnership capital | 231 | 230
Australian port operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 262 | 151
Non-Current Assets | 581 | 863
Current Liabilities | 223 | 131
Non-Current Liabilities | 180 | 393
Non-Controlling Interest in Operating Subsidiaries | 316 | 352
Partnership capital | 124 | 138
Chilean toll roads |  |
Disclosure of subsidiaries [line items] |  |
Current Assets |  | 126
Non-Current Assets |  | 835
Current Liabilities |  | 125
Non-Current Liabilities |  | 1,148
Non-Controlling Interest in Operating Subsidiaries |  | (335)
Partnership capital |  | 23
Peruvian toll roads |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 98 | 105
Non-Current Assets | 1,132 | 1,247
Current Liabilities | 17 | 438
Non-Current Liabilities | 561 | 212
Non-Controlling Interest in Operating Subsidiaries | 541 | 591
Partnership capital | 111 | 111
Indian Toll Roads |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 70 | 87
Non-Current Assets | 732 | 808
Current Liabilities | 166 | 177
Non-Current Liabilities | 364 | 426
Non-Controlling Interest in Operating Subsidiaries | 189 | 203
Partnership capital | 83 | 89
North American gas storage operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 258 | 170
Non-Current Assets | 1,479 | 1,433
Current Liabilities | 227 | 67
Non-Current Liabilities | 662 | 658
Non-Controlling Interest in Operating Subsidiaries | 525 | 544
Partnership capital | 323 | 334
Canadian diversified midstream operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 441 |
Non-Current Assets | 15,034 |
Current Liabilities | 2,875 |
Non-Current Liabilities | 7,283 |
Non-Controlling Interest in Operating Subsidiaries | 2,413 |
Partnership capital | 2,904 |
Western Canadian natural gas gathering and processing operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 130 | 125
Non-Current Assets | 3,932 | 3,964
Current Liabilities | 96 | 131
Non-Current Liabilities | 1,974 | 2,072
Non-Controlling Interest in Operating Subsidiaries | 1,422 | 1,348
Partnership capital | 570 | 538
U.S. data center operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 51 | 67
Non-Current Assets | 1,401 | 1,634
Current Liabilities | 86 | 95
Non-Current Liabilities | 929 | 1,138
Non-Controlling Interest in Operating Subsidiaries | 312 | 334
Partnership capital | 125 | 134
Australian data center operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 28 | 12
Non-Current Assets | 402 | 311
Current Liabilities | 23 | 127
Non-Current Liabilities | 119 | 7
Non-Controlling Interest in Operating Subsidiaries | 206 | 135
Partnership capital | 82 | 54
U.K. telecom towers operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 40 | 32
Non-Current Assets | 880 | 896
Current Liabilities | 190 | 332
Non-Current Liabilities | 495 | 327
Non-Controlling Interest in Operating Subsidiaries | 177 | 203
Partnership capital | 58 | 66
Indian Telecom Towers Operation |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 306 | 392
Non-Current Assets | 8,081 | 7,998
Current Liabilities | 407 | 493
Non-Current Liabilities | 6,034 | 5,392
Non-Controlling Interest in Operating Subsidiaries | 1,443 | 1,917
Partnership capital | 503 | 588
Holding LP and other |  |
Disclosure of subsidiaries [line items] |  |
Current Assets | 746 | 589
Non-Current Assets | 101 | 172
Current Liabilities | 889 | 870
Non-Current Liabilities | 2,470 | 3,423
Non-Controlling Interest in Operating Subsidiaries | 41 | 52
Partnership capital | $ (2,553) | $ (3,584)

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