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LONG-TERM INVESTMENTS (Tables) | 12 Months Ended
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Dec. 31, 2018
Equity Method Investments and Joint Ventures [Abstract] |
Schedule of Long-Term Investments |
| Ownership |  |  |  |  |
December 31, | Interest |  | 2018 |  | 2017 |
(millions of Canadian dollars) |  |  |  |  |  |
EQUITY INVESTMENTS |  |  |  |  |  |
Liquids Pipelines |  |  |  |  |  |
Bakken Pipeline System 1 | 27.6 | % | 2,039 |  | 1,938 |
Seaway Crude Pipeline System | 50.0 | % | 3,113 |  | 2,882 |
Illinois Extension Pipeline Company, L.L.C.2 | 65.0 | % | 724 |  | 686 |
Other | 30.0% - 43.8% |  | 97 |  | 87 |
Gas Transmission and Midstream |  |  |
Alliance Pipeline 3 | 50.0 | % | 368 |  | 375 |
Aux Sable | 42.7% - 50.0% |  | 311 |  | 300 |
DCP Midstream, LLC 4 | 50.0 | % | 2,368 |  | 2,143 |
Gulfstream Natural Gas System, L.L.C.4 | 50.0 | % | 1,289 |  | 1,205 |
Nexus Gas Transmission, LLC 4 | 50.0 | % | 1,757 |  | 834 |
Offshore - various joint ventures | 22.0% - 74.3% |  | 400 |  | 389 |
PennEast Pipeline Company LLC 4 | 20.0 | % | 97 |  | 69 |
Sabal Trail Transmission, LLC 5 | 50.0 | % | 1,586 |  | 2,355 |
Southeast Supply Header L.L.C.4 | 50.0 | % | 519 |  | 486 |
Steckman Ridge LP 4 | 49.5 | % | 237 |  | 221 |
Texas Express Pipeline 6 | 35.0 | % | — |  | 430 |
Vector Pipeline L.P. | 60.0 | % | 198 |  | 169 |
Other 4 | 33.3% - 50.0% |  | 6 |  | 34 |
Gas Distribution |  |  |
Noverco Common Shares | 38.9 | % | — |  | — |
Other 4 | 50.0 | % | 15 |  | 15 |
Green Power and Transmission |  |  |
Eolien Maritime France SAS | 50.0 | % | 68 |  | 69 |
Enbridge Renewable Infrastructure Investments S.a.r.l.7 | 25.5 | % | 127 |  | 763 |
Rampion Offshore Wind Project | 24.9 | % | 638 |  | 555 |
Other | 19.0% - 50.0% |  | 72 |  | 95 |
Eliminations and Other |  |  |
Other | 19.0% - 42.7% |  | 10 |  | 26 |
OTHER LONG-TERM INVESTMENTS |  |  |
Gas Distribution |  |  |
Noverco Preferred Shares |  | 478 |  | 371 |
Green Power and Transmission |  |  |
Emerging Technologies and Other |  | 80 |  | 80 |
Eliminations and Other |  |  |
Other |  | 110 |  | 67 |
|  |  | 16,707 |  | 16,644 |
1 | On February 15, 2017, EEP acquired an effective 27.6% interest in the Dakota Access and Energy Transfer Crude Oil Pipelines (collectively, the Bakken Pipeline System) for a purchase price of $2 billion (US$1.5 billion). The Bakken Pipeline System was placed into service on June 1, 2017. For details regarding our funding arrangement, refer to Note 20 - Noncontrolling Interests.
2 | Owns the Southern Access Extension Project.
3 | Certain assets of the Alliance Pipeline are pledged as collateral to Alliance Pipeline lenders.
4 | On February 27, 2017, we acquired Spectra Energy's interests in DCP Midstream, Gulfstream Natural Gas System, L.L.C, Nexus, PennEast, Southeast Supply Header L.L.C., Steckman Ridge LP and other equity investments as part of the Merger Transaction (Note 8).
5 | On February 27, 2017, we acquired Spectra Energy's consolidated interest in Sabal Trail as part of the Merger Transaction (Note 8). On July 3, 2017, Sabal Trail was placed into service and the assets, liabilities, and noncontrolling interests were deconsolidated as at the in-service date.
6 | On August 1, 2018 the sale of Midcoast Operating, L.P. and its subsidiaries closed. Upon closing of the sale, our interest in the Texas Express NGL pipeline system was sold along with the MOLP assets. The carrying value of $447 million of our equity method investment in the Texas Express NGL pipeline system was included within the disposal group of the transaction. For further details on the sale transaction please refer to Note 8 - Acquisitions and Dispositions.
7 | On February 8, 2017, we acquired an effective 50% interest in EnBW Hohe See GmbH & Co. KG. On August 1, 2018 we transferred our interest in the Hohe See Offshore wind facilities and its subsequent expansion to a newly formed entity, ERII. Subsequently, we sold a 49% interest in ERII to CPPIB, reducing our interest in the project to 25.5%.
Summary of Combined Financial Information | Summarized combined financial information of our interest in unconsolidated equity investments (presented at 100%) is as follows:
| Year Ended December 31,
| 2018 | 2017 | 2016
| Seaway |  | Other |  | Total |  | Seaway |  | Other |  | Total |  | Seaway |  | Other |  | Total |
(millions of Canadian dollars) |  |  |  |  |  |  |  |  |
Operating revenues | 966 |  | 18,251 |  | 19,217 |  | 959 |  | 15,254 |  | 16,213 |  | 938 |  | 3,164 |  | 4,102 |
Operating expenses | 212 |  | 15,422 |  | 15,634 |  | 286 |  | 12,911 |  | 13,197 |  | 293 |  | 3,051 |  | 3,344 |
Earnings/(loss) | 646 |  | 2,308 |  | 2,954 |  | 672 |  | 2,056 |  | 2,728 |  | 643 |  | (2 | ) | 641 |
Earnings attributable to controlling interests | 323 |  | 1,059 |  | 1,382 |  | 336 |  | 926 |  | 1,262 |  | 322 |  | 147 |  | 469 |
| December 31, 2018 | December 31, 2017
| Seaway |  | Other |  | Total |  | Seaway |  | Other |  | Total |
(millions of Canadian dollars) |  |  |  |  |  |
Current assets | 113 |  | 3,176 |  | 3,289 |  | 106 |  | 3,432 |  | 3,538 |
Non-current assets | 3,585 |  | 45,531 |  | 49,116 |  | 3,329 |  | 41,697 |  | 45,026 |
Current liabilities | 123 |  | 5,413 |  | 5,536 |  | 143 |  | 3,311 |  | 3,454 |
Non-current liabilities | 16 |  | 15,859 |  | 15,875 |  | 13 |  | 13,582 |  | 13,595 |
Noncontrolling interests | — |  | 3,479 |  | 3,479 |  | — |  | 3,191 |  | 3,191 |

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- Definition Tabular disclosure of equity method investments including, but not limited to, name of each investee or group of investments, percentage ownership, difference between recorded amount of an investment and the value of the underlying equity in the net assets, and summarized financial information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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