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ACQUISITION AND DISPOSITIONS - DISPOSITIONS, SOUTH PRAIRIE (Details) - CAD CAD in Millions |  | 12 Months Ended
--- | --- | ---
Dec. 01, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
DISPOSITIONS |  |  |  |
Proceeds from dispositions |  | CAD 1,379 | CAD 146 | CAD 85
Liquids Pipelines | Disposed of by sale, not discontinued operations | South Prairie Region |  |  |  |
DISPOSITIONS |  |  |  |
Proceeds from dispositions | CAD 1,080 |  |  |
Pre-tax earnings |  | CAD 41 |  |
Liquids Pipelines | Disposed of by sale, not discontinued operations | South Prairie Region | Other income/(expense) |  |  |  |
DISPOSITIONS |  |  |  |
Gain on sale of assets | CAD 850 |  |  |

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- Definition Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2443-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=64862545&loc=d3e2941-110230 + Details
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