The percentage of ownership of a consolidated investment that was sold.

No definition available.

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- Definition

Represents the amount of cash proceeds from sale of disposal group, including those classified as components of the entity discontinued operations.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

+ 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

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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- Details

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- Details

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- Details

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ACQUISITIONS AND DISPOSITIONS - Other Disposition (Narrative) (Details) CAD in Millions, $ in Millions	1 Months Ended				12 Months Ended
	Dec. 31, 2016 CAD	Aug. 31, 2015 CAD	Aug. 31, 2015 USD ($)	May 31, 2015 CAD	Dec. 31, 2017 CAD	Dec. 31, 2016 CAD	Dec. 31, 2015 CAD
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposal					CAD 120	CAD 848	CAD 94
Other miscellaneous non-core assets \| Dispositions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds	CAD 286
Frontier Pipeline Company \| Dispositions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds		CAD 112	$ 85
Interest sold (as a percent)		77.80%	77.80%
Gain on disposal		CAD 70	$ 53
Crude oil pipeline system \| Dispositions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds				CAD 26
Gain on disposal				CAD 22