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GOODWILL (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Gross Cost |  |  |
Goodwill, gross at beginning of period | $ 36,040 | $ 35,019 |
Disposition |  | (628) |
Allocation to assets held for sale |  | (188) |
Foreign exchange and other | (1,306) | 1,837 |
Goodwill, gross at end of period | 34,734 | 36,040 | $ 35,019
Accumulated Impairment |  |  |
Goodwill, impaired, accumulated impairment loss at beginning of period | (1,581) | (562) |
Impairment | 0 | (1,019) | (102)
Goodwill, impaired, accumulated impairment loss at end of period | (1,581) | (1,581) | (562)
Goodwill | 33,153 | 34,459 |
Eliminations and Other |  |  |
Gross Cost |  |  |
Goodwill, gross at beginning of period | 13 | 13 |
Disposition |  | 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 | 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 | 8,324 | 7,786 |
Disposition |  | 0 |
Allocation to assets held for sale |  | 0 |
Foreign exchange and other | (373) | 538 |
Goodwill, gross at end of period | 7,951 | 8,324 | 7,786
Accumulated Impairment |  |  |
Goodwill, impaired, accumulated impairment loss at beginning of period | 0 | 0 |
Impairment |  | 0 |
Goodwill, impaired, accumulated impairment loss at end of period | 0 | 0 | 0
Goodwill | 7,951 | 8,324 |
Gas Transmission and Midstream |  |  |
Gross Cost |  |  |
Goodwill, gross at beginning of period | 22,338 | 21,539 |
Disposition |  | (628) |
Allocation to assets held for sale |  | (55) |
Foreign exchange and other | (933) | 1,482 |
Goodwill, gross at end of period | 21,405 | 22,338 | 21,539
Accumulated Impairment |  |  |
Goodwill, impaired, accumulated impairment loss at beginning of period | (1,561) | (542) |
Impairment |  | (1,019) |
Goodwill, impaired, accumulated impairment loss at end of period | (1,561) | (1,561) | (542)
Goodwill | 19,844 | 20,777 |
Gas Distribution and Storage |  |  |
Gross Cost |  |  |
Goodwill, gross at beginning of period | 5,363 | 5,679 |
Disposition |  | 0 |
Allocation to assets held for sale |  | (133) |
Foreign exchange and other | 0 | (183) |
Goodwill, gross at end of period | 5,363 | 5,363 | 5,679
Accumulated Impairment |  |  |
Goodwill, impaired, accumulated impairment loss at beginning of period | (7) | (7) |
Impairment |  | 0 |
Goodwill, impaired, accumulated impairment loss at end of period | (7) | (7) | (7)
Goodwill | 5,356 | 5,356 |
Renewable Power Generation |  |  |
Gross Cost |  |  |
Goodwill, gross at beginning of period | 0 | 0 |
Disposition |  | 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 |
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 |
Disposition |  | 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 |
Goodwill, impaired, accumulated impairment loss at end of period | 0 | 0 | $ 0
Goodwill | $ 2 | $ 2 |

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