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GOODWILL (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Gross Cost |  |  |
Goodwill, gross at beginning of period | $ 35,019 | $ 538 |
Acquired in Merger Transaction (Note 7) |  | 36,656 |
Sabal Trail deconsolidation (Note 12) |  | (966) |
Disposition | (628) | (29) |
Allocation to assets held for sale | (188) |  |
Foreign exchange and other | 1,837 | (1,180) |
Goodwill, gross at end of period | 36,040 | 35,019 | $ 538
Accumulated Impairment |  |  |
Goodwill, impaired, accumulated impairment loss at beginning of period | (562) | (460) |
Impairment | (1,019) | (102) | 0
Goodwill, impaired, accumulated impairment loss at end of period | (1,581) | (562) | (460)
Goodwill | 34,459 | 34,457 |
Consolidation, Eliminations |  |  |
Gross Cost |  |  |
Goodwill, gross at beginning of period | 13 | 13 |
Acquired in Merger Transaction (Note 7) |  | 0 |
Sabal Trail deconsolidation (Note 12) |  | 0 |
Disposition | 0 | 0 |
Allocation to assets held for sale | 0 |  |
Foreign exchange and other | 0 | 0 |
Goodwill, gross at end of period | 13 | 13 | 13
Accumulated Impairment |  |  |
Goodwill, impaired, accumulated impairment loss at beginning of period | (13) | (13) |
Impairment | 0 | 0 |
Goodwill, impaired, accumulated impairment loss at end of period | (13) | (13) | (13)
Goodwill | 0 | 0 |
Liquids Pipelines |  |  |
Gross Cost |  |  |
Goodwill, gross at beginning of period | 7,786 | 59 |
Acquired in Merger Transaction (Note 7) |  | 8,070 |
Sabal Trail deconsolidation (Note 12) |  | 0 |
Disposition | 0 | (29) |
Allocation to assets held for sale | 0 |  |
Foreign exchange and other | 538 | (314) |
Goodwill, gross at end of period | 8,324 | 7,786 | 59
Accumulated Impairment |  |  |
Goodwill, impaired, accumulated impairment loss at beginning of period | 0 | 0 |
Impairment | 0 | 0 |
Goodwill, impaired, accumulated impairment loss at end of period | 0 | 0 | 0
Goodwill | 8,324 | 7,786 |
Gas Transmission & Midstream |  |  |
Gross Cost |  |  |
Goodwill, gross at beginning of period | 21,539 | 457 |
Acquired in Merger Transaction (Note 7) |  | 22,914 |
Sabal Trail deconsolidation (Note 12) |  | (966) |
Disposition | (628) | 0 |
Allocation to assets held for sale | (55) |  |
Foreign exchange and other | 1,482 | (866) |
Goodwill, gross at end of period | 22,338 | 21,539 | 457
Accumulated Impairment |  |  |
Goodwill, impaired, accumulated impairment loss at beginning of period | (542) | (440) |
Impairment | (1,019) | (102) |
Goodwill, impaired, accumulated impairment loss at end of period | (1,561) | (542) | (440)
Goodwill | 20,777 | 20,997 |
Gas Distribution |  |  |
Gross Cost |  |  |
Goodwill, gross at beginning of period | 5,679 | 7 |
Acquired in Merger Transaction (Note 7) |  | 5,672 |
Sabal Trail deconsolidation (Note 12) |  | 0 |
Disposition | 0 | 0 |
Allocation to assets held for sale | (133) |  |
Foreign exchange and other | (183) | 0 |
Goodwill, gross at end of period | 5,363 | 5,679 | 7
Accumulated Impairment |  |  |
Goodwill, impaired, accumulated impairment loss at beginning of period | (7) | (7) |
Impairment | 0 | 0 |
Goodwill, impaired, accumulated impairment loss at end of period | (7) | (7) | (7)
Goodwill | 5,356 | 5,672 |
Green Power and Transmission |  |  |
Gross Cost |  |  |
Goodwill, gross at beginning of period | 0 | 0 |
Acquired in Merger Transaction (Note 7) |  | 0 |
Sabal Trail deconsolidation (Note 12) |  | 0 |
Disposition | 0 | 0 |
Allocation to assets held for sale | 0 |  |
Foreign exchange and other | 0 | 0 |
Goodwill, gross at end of period | 0 | 0 | 0
Accumulated Impairment |  |  |
Goodwill, impaired, accumulated impairment loss at beginning of period | 0 | 0 |
Impairment | 0 | 0 |
Goodwill, impaired, accumulated impairment loss at end of period | 0 | 0 | 0
Goodwill | 0 | 0 |
Energy Services |  |  |
Gross Cost |  |  |
Goodwill, gross at beginning of period | 2 | 2 |
Acquired in Merger Transaction (Note 7) |  | 0 |
Sabal Trail deconsolidation (Note 12) |  | 0 |
Disposition | 0 | 0 |
Allocation to assets held for sale | 0 |  |
Foreign exchange and other | 0 | 0 |
Goodwill, gross at end of period | 2 | 2 | 2
Accumulated Impairment |  |  |
Goodwill, impaired, accumulated impairment loss at beginning of period | 0 | 0 |
Impairment | 0 | 0 |
Goodwill, impaired, accumulated impairment loss at end of period | 0 | 0 | $ 0
Goodwill | $ 2 | $ 2 |

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