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NONCONTROLLING INTERESTS - NONCONTROLLING (Details) - CAD ($) shares in Millions, $ in Millions | Nov. 29, 2018 | Dec. 31, 2018 | Aug. 01, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
NONCONTROLLING INTERESTS |  |  |  |
Noncontrolling interests |  | $ 3,965 |  | $ 7,597
Algonquin Gas Transmission LLC |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Noncontrolling interests |  | 518 |  | 476
Enbridge Energy Management, L.L.C. (EEM) |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Noncontrolling interests |  | 0 |  | 34
Enbridge Energy Partners, L.P. |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Noncontrolling interests |  | 0 |  | 138
Enbridge Gas Distribution Inc. |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Noncontrolling interests |  | 0 |  | 100
Enbridge Gas Distribution Inc. | Preference shares |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Stock redeemed during period (in shares) | 4.0 |  |  |
Maritimes and Northeast Pipeline |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Noncontrolling interests |  | 613 |  | 572
Renewable energy assets |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Noncontrolling interests |  | 1,961 |  | 806
Spectra Energy |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Noncontrolling interests |  | 0 |  | 4,335
Union Gas Limited |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Noncontrolling interests |  | 0 |  | 110
Union Gas Limited | Preference shares |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Stock redeemed during period (in shares) | 4.0 |  |  |
Westcoast Energy Inc. |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Noncontrolling interests |  | $ 841 |  | $ 1,005
Westcoast Energy Inc. | Preference shares |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Number of redeemable preferred shares held by noncontrolling owners (in shares) |  | 16.6 |  |
Number of first preferred shares held by noncontrolling owners (in shares) |  |  |  | 12.0
Other Non Controlling Interest |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Noncontrolling interests |  | $ 32 |  | $ 21
Enbridge Energy Management, L.L.C. (EEM) |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Ownership interest percentage held by noncontrolling owners |  |  |  | 88.30%
Enbridge Energy Partners, L.P. |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Ownership interest percentage held by noncontrolling owners |  |  |  | 68.20%
Canadian Renewable Assets | Discontinued Operations, Disposed of by Sale |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 49.00% |
Magic Valley |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Ownership interest percentage held by noncontrolling owners |  | 20.00% |  | 20.00%
Spectra Energy | Spectra Energy |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Ownership interest percentage held by noncontrolling owners |  |  |  | 25.70%
Maritimes and Northeast Pipeline |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Ownership interest percentage held by noncontrolling owners |  | 22.00% |  |
Wildcat |  |  |  |
NONCONTROLLING INTERESTS |  |  |  |
Ownership interest percentage held by noncontrolling owners |  | 20.00% |  | 20.00%

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