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LONG-TERM INVESTMENTS - SCHEDULE (Details) - CAD CAD in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | May 19, 2016 | Nov. 30, 2015 | Nov. 04, 2015 | Jul. 01, 2014
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Total Long-term Investments | CAD 6,836 | CAD 7,008 |  |  |  |  |
Goodwill | 859 | 885 |  |  |  |  |
Amortizable assets | 687 | 568 |  |  |  |  |
Dividends received | CAD 825 | 719 | CAD 564 |  |  |  |
Seaway Crude Pipeline System | Liquids Pipelines |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 50.00% |  |  |  |  |  |
Equity Investments | CAD 3,129 | 3,251 |  |  |  |  |
Southern Access Extension Project | Liquids Pipelines |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 65.00% |  |  |  |  |  | 65.00%
Equity Investments | CAD 759 | 713 |  |  |  |  |
Enbridge Rail (Philadelphia) L.L.C. | Liquids Pipelines |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 75.00% |  |  |  |  |  |
Equity Investments | CAD 19 | 168 |  |  |  |  |
Texas Express Pipeline | Gas Pipelines and Processing |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 35.00% |  |  |  |  |  |
Equity Investments | CAD 484 | 515 |  |  |  |  |
Alliance Pipeline | Gas Pipelines and Processing |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 50.00% |  |  |  |  |  |
Equity Investments | CAD 411 | 427 |  |  |  |  |
Aux Sable | Gas Pipelines and Processing |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Equity Investments | CAD 324 | 344 |  |  |  |  |
Aux Sable | Gas Pipelines and Processing | Minimum |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 42.70% |  |  |  |  |  |
Aux Sable | Gas Pipelines and Processing | Maximum |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 50.00% |  |  |  |  |  |
Vector Pipeline | Gas Pipelines and Processing |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 60.00% |  |  |  |  |  |
Equity Investments | CAD 159 | 159 |  |  |  |  |
Offshore - various joint ventures | Gas Pipelines and Processing |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Equity Investments | CAD 435 | 479 |  |  |  |  |
Offshore - various joint ventures | Gas Pipelines and Processing | Minimum |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 22.00% |  |  |  |  |  |
Offshore - various joint ventures | Gas Pipelines and Processing | Maximum |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 74.30% |  |  |  |  |  |
Rampion Offshore Wind Project |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) |  |  |  |  | 24.90% | 24.90% |
Rampion Offshore Wind Project | Green Power and Transmission |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 24.90% |  |  |  |  |  |
Equity Investments | CAD 345 | 201 |  |  |  |  |
Eolien Maritime France SAS |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) |  |  |  | 50.00% |  |  |
Eolien Maritime France SAS | Green Power and Transmission |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 50.00% |  |  |  |  |  |
Equity Investments | CAD 58 |  |  |  |  |  |
Emerging Technologies and Other | Green Power and Transmission |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Other Long-Term Investments | 90 | 106 |  |  |  |  |
Other | Liquids Pipelines |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Equity Investments | CAD 70 | 69 |  |  |  |  |
Other | Liquids Pipelines | Minimum |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 30.00% |  |  |  |  |  |
Other | Liquids Pipelines | Maximum |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 43.90% |  |  |  |  |  |
Other | Gas Pipelines and Processing |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Equity Investments | CAD 4 | 12 |  |  |  |  |
Other | Gas Pipelines and Processing | Minimum |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 33.30% |  |  |  |  |  |
Other | Gas Pipelines and Processing | Maximum |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 70.00% |  |  |  |  |  |
Other | Green Power and Transmission |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Equity Investments | CAD 100 | 109 |  |  |  |  |
Other | Green Power and Transmission | Minimum |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 18.90% |  |  |  |  |  |
Other | Green Power and Transmission | Maximum |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 50.00% |  |  |  |  |  |
Other | Eliminations and Other |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Equity Investments | CAD 15 | 12 |  |  |  |  |
Other | Eliminations and Other | Minimum |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 19.00% |  |  |  |  |  |
Other | Eliminations and Other | Maximum |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 42.70% |  |  |  |  |  |
Other | Eliminations and Other |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Other Long-Term Investments | CAD 79 | CAD 84 |  |  |  |  |
Noverco | Common shares |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 38.90% | 38.90% |  |  |  |  |
Noverco | Common shares | Gas Distribution |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Ownership interest (as a percent) | 38.90% |  |  |  |  |  |
Noverco | Preference shares | Gas Distribution |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Other Long-Term Investments | CAD 355 | CAD 359 |  |  |  |  |

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