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GOODWILL | 12 Months Ended
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Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL | GOODWILL
| Liquids Pipelines | Gas Transmission and Midstream | Gas Distribution and Storage |  | Energy Services |  | Consolidated
(millions of Canadian dollars) |  |  |  |  |  |  |
Balance at January 1, 2019 | 8,324 |  | 20,777 |  | 5,356 |  |  | 2 |  |  | 34,459 |
Foreign exchange and other | (373) |  | (933) |  | — |  |  | — |  |  | (1,306) |
Balance at December 31, 2019 1,2 | 7,951 |  | 19,844 |  | 5,356 |  |  | 2 |  |  | 33,153 |
Foreign exchange and other | (123) |  | (364) |  | — |  |  | — |  |  | (487) |
Acquisition | — |  | — |  | 22 |  |  | — |  |  | 22 |
Balance at December 31, 2020 1,2 | 7,828 |  | 19,480 |  | 5,378 |  |  | 2 |  |  | 32,688 |
1 Gross cost of goodwill as at December 31, 2020 and 2019 was $34.3 billion and $34.7 billion, respectively. 2 Accumulated impairment as at December 31, 2020 and 2019 was $1.6 billion .

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- Definition The entire disclosure for goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2144439 + Details
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