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ASSETS HELD FOR SALE (Details) $ in Millions, $ in Billions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 CAD ($) | May 09, 2018 USD ($)
Asset Impairment | Disposal Group, Held-for-sale, Not Discontinued Operations | Midcoast Operating L.P. |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Provision for loss (gain) on disposal, before income tax | $ 913 |
Provision for loss (gain) on disposal, net of tax | 701 |
Asset Impairment | Disposal Group, Held-for-sale, Not Discontinued Operations | Line 10 Crude Oil Pipeline |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Provision for loss (gain) on disposal, before income tax | 144 |
Provision for loss (gain) on disposal, net of tax | $ 85 |
Subsequent Event | Enbridge (U.S.) Inc. | Midcoast Operating L.P. |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Disposal group, consideration |  | $ 1.1

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