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INVESTMENT IN ASSOCIATES AND JOINT VENTURES - Income Statement Impact of Investments (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |
Revenues | $ 8,885 | $ 6,597 | $ 4,652
Net income | 904 | 650 | 806
OCI | (62) | 590 | (945)
Comprehensive income (loss) | 842 | 1,240 | (139)
Total |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |
Revenues | 8,897 | 6,595 | 5,872
Net income | 1,049 | 651 | 41
OCI | (1,495) | 237 | (138)
Comprehensive income (loss) | (446) | 888 | (97)
Net Income Attributable to the Partnership | 131 | 224 | (102)
Utilities |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |
Revenues | 1,715 | 1,046 | 541
Net income | 364 | 354 | 92
OCI | (205) | 26 | 110
Comprehensive income (loss) | 159 | 380 | 202
Net Income Attributable to the Partnership | 50 | 57 | 56
Transport |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |
Revenues | 4,161 | 3,351 | 3,747
Net income | 171 | 22 | (74)
OCI | (1,419) | 364 | (856)
Comprehensive income (loss) | (1,248) | 386 | (930)
Net Income Attributable to the Partnership | (101) | 2 | (333)
Midstream |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |
Revenues | 767 | 734 | 739
Net income | 236 | 351 | 91
OCI | 0 | (54) | 8
Comprehensive income (loss) | 236 | 297 | 99
Net Income Attributable to the Partnership | 136 | 184 | 46
Data |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |
Revenues | 2,245 | 1,447 | 804
Net income | 293 | (38) | 64
OCI | 374 | 57 | 244
Comprehensive income (loss) | 667 | 19 | 308
Net Income Attributable to the Partnership | 45 | (9) | 74
Corporate |  |  |
Disclosure Of Associates And Joint Ventures [Line Items] |  |  |
Revenues | 9 | 17 | 41
Net income | (15) | (38) | (132)
OCI | (245) | (156) | 356
Comprehensive income (loss) | (260) | (194) | 224
Net Income Attributable to the Partnership | $ 1 | $ (10) | $ 55

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