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SUBSEQUENT EVENTS (Details) $ in Millions, $ in Billions | Aug. 01, 2018 CAD ($) | May 09, 2018 CAD ($) | Aug. 01, 2018 USD ($) | Jul. 04, 2018 CAD ($) | May 09, 2018 USD ($)
--- | --- | --- | --- | --- | ---
The Assets |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |
Proceeds from sale of equity method investments |  | $ 1,750 |  |  |
The Assets | Subsequent Event |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |
Proceeds from sale of equity method investments | $ 1,750 |  |  |  |
Canadian Natural Gas Gathering and Processing Business | Disposal Group, Held-for-sale, Not Discontinued Operations | Subsequent Event |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |
Disposal group, consideration |  |  |  | $ 4,310 |
Midcoast Operating L.P. | Disposal Group, Held-for-sale, Not Discontinued Operations | Enbridge (U.S.) Inc. |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |
Disposal group, consideration |  |  |  |  | $ 1.1
Midcoast Operating L.P. | Disposed of by sale, not discontinued operations | Subsequent Event | Enbridge (U.S.) Inc. |  |  |  |  |
SUBSEQUENT EVENTS |  |  |  |  |
Disposal group, consideration |  |  | $ 1.1 |  |

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