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Goodwill And Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2017
GOODWILL AND OTHER INTANGIBLE ASSETS |
Segment breakdown of Goodwill and Other Intangible Assets |
|  | Oil Sands |  | Refining and Marketing |  |  |  |
($ millions) |  | Goodwill |  | Goodwill |  | Brand name |  | Customer lists |  | Total |  |
At December 31, 2015 |  | 2 752 |  | 148 |  | 166 |  | 13 |  | 3 079 |  |
Amortization |  | — |  | — |  | — |  | (4 | ) | (4 | ) |
At December 31, 2016 |  | 2 752 |  | 148 |  | 166 |  | 9 |  | 3 075 |  |
Disposals (note 36) |  | — |  | (8 | ) | (4 | ) | (1 | ) | (13 | ) |
Additions |  | — |  | — |  | — |  | 2 |  | 2 |  |
Amortization |  | — |  | — |  | — |  | (3 | ) | (3 | ) |
At December 31, 2017 |  | 2 752 |  | 140 |  | 162 |  | 7 |  | 3 061 |  |

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- Definition The disclosure of the reconciliation of changes in intangible assets and goodwill. [Refer: Intangible assets and goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 38 -IssueDate 2017-01-01 -Paragraph 118 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2017-03-01&anchor=para_118&doctype=Standard -URIDate 2017-03-09 + Details
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