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SEGMENT INFORMATION (Operating Segments) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Disclosure of operating segments [line items] |  |  |  |  |
Revenues | $ 1,044 | $ 934 | $ 2,057 | $ 1,590 |
Costs attributed to revenues | (467) | (373) | (876) | (716) |
General and administrative costs | (54) | (59) | (112) | (110) |
Other income (expense) | (12) | (13) | (17) | 14 |
Interest expense | (125) | (107) | (239) | (201) |
Depreciation and amortization | (188) | (206) | (381) | (326) |
Deferred taxes | (26) | (18) | (41) | (18) |
Mark-to-market on hedging items and other | 46 | (59) | (179) | (111) |
Gain (Loss) on Disposition of Business | 0 | 0 | 338 | 0 |
Share of earnings from associates | 1 | 36 | (4) | 59 | $ 118
Net income attributable to non-controlling interest and preferred unitholders | (94) | (122) | (212) | (146) |
Net income (loss) attributable to partnership | 125 | 13 | 334 | 35 |
Utilities |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenues | 589 |  | 1,124 |  |
Transport |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenues | 341 |  | 680 |  |
Energy |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenues | 114 |  | 253 |  |
Reportable segments |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenues | 837 | 837 | 1,729 | 1,569 |
Costs attributed to revenues | (395) | (375) | (804) | (706) |
General and administrative costs | (54) | (59) | (112) | (110) |
Adjusted EBITDA | 388 | 403 | 813 | 753 |
Other income (expense) | 10 | 2 | 30 | 23 |
Interest expense | (104) | (110) | (216) | (220) |
Funds From Operations | 294 | 295 | 627 | 556 |
Depreciation and amortization | (183) | (186) | (393) | (344) |
Deferred taxes | (13) | (5) | (15) | (8) |
Mark-to-market on hedging items and other | 27 | (91) | (223) | (169) |
Gain (Loss) on Disposition of Business |  |  | 338 |  |
Share of earnings from associates | 0 | 0 | 0 | 0 |
Net income attributable to non-controlling interest and preferred unitholders | 0 | 0 | 0 | 0 |
Net income (loss) attributable to partnership | 125 | 13 | 334 | 35 |
Reportable segments | Utilities |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenues | 245 | 278 | 517 | 454 |
Costs attributed to revenues | (68) | (73) | (137) | (121) |
General and administrative costs | 0 | 0 | 0 | 0 |
Adjusted EBITDA | 177 | 205 | 380 | 333 |
Other income (expense) | (8) | (8) | (11) | (7) |
Interest expense | (30) | (29) | (61) | (58) |
Funds From Operations | 139 | 168 | 308 | 268 |
Depreciation and amortization | (43) | (57) | (101) | (89) |
Deferred taxes | (12) | (12) | (27) | (18) |
Mark-to-market on hedging items and other | (10) | (12) | (57) | (28) |
Gain (Loss) on Disposition of Business |  |  | 0 |  |
Share of earnings from associates | 0 | 0 | 0 | 0 |
Net income attributable to non-controlling interest and preferred unitholders | 0 | 0 | 0 | 0 |
Net income (loss) attributable to partnership | 74 | 87 | 123 | 133 |
Reportable segments | Transport |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenues | 410 | 395 | 834 | 770 |
Costs attributed to revenues | (237) | (224) | (483) | (434) |
General and administrative costs | 0 | 0 | 0 | 0 |
Adjusted EBITDA | 173 | 171 | 351 | 336 |
Other income (expense) | 0 | 1 | 2 | (2) |
Interest expense | (40) | (38) | (83) | (77) |
Funds From Operations | 133 | 134 | 270 | 257 |
Depreciation and amortization | (85) | (75) | (184) | (151) |
Deferred taxes | (1) | 2 | 12 | 7 |
Mark-to-market on hedging items and other | (23) | (18) | (62) | (39) |
Gain (Loss) on Disposition of Business |  |  | 0 |  |
Share of earnings from associates | 0 | 0 | 0 | 0 |
Net income attributable to non-controlling interest and preferred unitholders | 0 | 0 | 0 | 0 |
Net income (loss) attributable to partnership | 24 | 43 | 36 | 74 |
Reportable segments | Energy |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenues | 137 | 123 | 290 | 265 |
Costs attributed to revenues | (68) | (60) | (142) | (116) |
General and administrative costs | 0 | 0 | 0 | 0 |
Adjusted EBITDA | 69 | 63 | 148 | 149 |
Other income (expense) | 3 | 3 | 8 | 6 |
Interest expense | (18) | (23) | (36) | (50) |
Funds From Operations | 54 | 43 | 120 | 105 |
Depreciation and amortization | (38) | (35) | (71) | (68) |
Deferred taxes | (1) | 5 | (3) | 0 |
Mark-to-market on hedging items and other | (20) | (12) | (38) | (19) |
Gain (Loss) on Disposition of Business |  |  | 0 |  |
Share of earnings from associates | 0 | 0 | 0 | 0 |
Net income attributable to non-controlling interest and preferred unitholders | 0 | 0 | 0 | 0 |
Net income (loss) attributable to partnership | (5) | 1 | 8 | 18 |
Reportable segments | Comm. Infrastructure |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenues | 45 | 41 | 88 | 80 |
Costs attributed to revenues | (22) | (18) | (42) | (35) |
General and administrative costs | 0 | 0 | 0 | 0 |
Adjusted EBITDA | 23 | 23 | 46 | 45 |
Other income (expense) | (1) | (1) | (2) | (1) |
Interest expense | (3) | (3) | (6) | (6) |
Funds From Operations | 19 | 19 | 38 | 38 |
Depreciation and amortization | (17) | (19) | (37) | (36) |
Deferred taxes | 0 | 3 | 2 | 5 |
Mark-to-market on hedging items and other | 1 | (1) | 1 | (2) |
Gain (Loss) on Disposition of Business |  |  | 0 |  |
Share of earnings from associates | 0 | 0 | 0 | 0 |
Net income attributable to non-controlling interest and preferred unitholders | 0 | 0 | 0 | 0 |
Net income (loss) attributable to partnership | 3 | 2 | 4 | 5 |
Reportable segments | Corporate |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenues | 0 | 0 | 0 | 0 |
Costs attributed to revenues | 0 | 0 | 0 | 0 |
General and administrative costs | (54) | (59) | (112) | (110) |
Adjusted EBITDA | (54) | (59) | (112) | (110) |
Other income (expense) | 16 | 7 | 33 | 27 |
Interest expense | (13) | (17) | (30) | (29) |
Funds From Operations | (51) | (69) | (109) | (112) |
Depreciation and amortization | 0 | 0 | 0 | 0 |
Deferred taxes | 1 | (3) | 1 | (2) |
Mark-to-market on hedging items and other | 79 | (48) | (67) | (81) |
Gain (Loss) on Disposition of Business |  |  | 338 |  |
Share of earnings from associates | 0 | 0 | 0 | 0 |
Net income attributable to non-controlling interest and preferred unitholders | 0 | 0 | 0 | 0 |
Net income (loss) attributable to partnership | 29 | (120) | 163 | (195) |
Contribution from investments in associates |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenues | (368) | (408) | (791) | (788) |
Costs attributed to revenues | 211 | 220 | 431 | 411 |
General and administrative costs | 0 | 0 | 0 | 0 |
Adjusted EBITDA | (157) | (188) | (360) | (377) |
Other income (expense) | 4 | 1 | 4 | 7 |
Interest expense | 30 | 44 | 72 | 93 |
Funds From Operations | (123) | (143) | (284) | (277) |
Depreciation and amortization | 91 | 91 | 202 | 179 |
Deferred taxes | (3) | (3) | (12) | (1) |
Mark-to-market on hedging items and other | 34 | 19 | 98 | 40 |
Gain (Loss) on Disposition of Business |  |  | 0 |  |
Share of earnings from associates | 1 | 36 | (4) | 59 |
Net income attributable to non-controlling interest and preferred unitholders | 0 | 0 | 0 | 0 |
Net income (loss) attributable to partnership | 0 | 0 | 0 | 0 |
Attributable to non- controlling interest |  |  |  |  |
Disclosure of operating segments [line items] |  |  |  |  |
Revenues | 575 | 505 | 1,119 | 809 |
Costs attributed to revenues | (283) | (218) | (503) | (421) |
General and administrative costs | 0 | 0 | 0 | 0 |
Adjusted EBITDA | 292 | 287 | 616 | 388 |
Other income (expense) | (26) | (16) | (51) | (16) |
Interest expense | (51) | (41) | (95) | (74) |
Funds From Operations | 215 | 230 | 470 | 298 |
Depreciation and amortization | (96) | (111) | (190) | (161) |
Deferred taxes | (10) | (10) | (14) | (9) |
Mark-to-market on hedging items and other | (15) | 13 | (54) | 18 |
Gain (Loss) on Disposition of Business |  |  | 0 |  |
Share of earnings from associates | 0 | 0 | 0 | 0 |
Net income attributable to non-controlling interest and preferred unitholders | (94) | (122) | (212) | (146) |
Net income (loss) attributable to partnership | $ 0 | $ 0 | $ 0 | $ 0 |

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