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INVESTMENT IN ASSOCIATES AND JOINT VENTURES - Income Statement Impact of Investments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |
Revenues | $ 4,652 | $ 3,535 | $ 2,115 |
Net income | 806 | 574 | 528 | [1]
OCI | (945) | 323 | 576 |
Comprehensive (loss) income | (139) | 897 | 1,104 |
Utilities |  |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |
Revenues | 541 | 1,164 | 592 |
Net income | 92 | 101 | 87 |
OCI | 110 | 779 | 233 |
Comprehensive (loss) income | 202 | 880 | 320 |
Attributable to Other Ownership Interests | 146 | 642 | 241 |
Attributable to Partnership's Share | 56 | 238 | 79 |
Transport |  |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |
Revenues | 3,747 | 3,796 | 2,861 |
Net income | (74) | 213 | 221 |
OCI | (856) | 718 | 1,399 |
Comprehensive (loss) income | (930) | 931 | 1,620 |
Attributable to Other Ownership Interests | (597) | 744 | 1,210 |
Attributable to Partnership's Share | (333) | 187 | 410 |
Energy |  |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |
Revenues | 739 | 724 | 598 |
Net income | 91 | 22 | 141 |
OCI | 8 | (37) | 138 |
Comprehensive (loss) income | 99 | (15) | 279 |
Attributable to Other Ownership Interests | 53 | (22) | 183 |
Attributable to Partnership's Share | 46 | 7 | 96 |
Data Infrastructure [Member] |  |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |
Revenues | 804 | 783 | 767 |
Net income | 64 | 58 | 121 |
OCI | 244 | 435 | 385 |
Comprehensive (loss) income | 308 | 493 | 506 |
Attributable to Other Ownership Interests | 234 | 409 | 399 |
Attributable to Partnership's Share | 74 | 84 | 107 |
Corporate |  |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |
Revenues | 41 | 2 |  |
Net income | (132) | (16) |  |
OCI | 356 | (145) |  |
Comprehensive (loss) income | 224 | (161) |  |
Attributable to Other Ownership Interests | 169 | (108) |  |
Attributable to Partnership's Share | 55 | (53) |  |
Associates and Joint Ventures |  |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |  |
Revenues | 5,872 | 6,469 | 4,818 |
Net income | 41 | 378 | 570 |
OCI | (138) | 1,750 | 2,155 |
Comprehensive (loss) income | (97) | 2,128 | 2,725 |
Attributable to Other Ownership Interests | 5 | 1,665 | 2,033 |
Attributable to Partnership's Share | $ (102) | $ 463 | $ 692 |
[1] | Certain net income allocations have been reclassified to provide comparability with the current year consolidated statements of partnership capital.

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