ACQUISITION OF COLUMBIA - Pro Forma Information (Details) - CAD CAD in Millions	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Business Combinations [Abstract]
Revenues	CAD 13,404	CAD 13,007
Net Income/(Loss)	715	(820)
Net Income/(Loss) Attributable to Controlling Interests and to Common Shares	CAD 431	CAD (877)

Business Acquisition, Pro Forma Net Income (Loss) Attributable to Controlling Interest And Common Shares

No definition available.

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- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

+ Details

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

+ Details

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- References

No definition available.

+ Details

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