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Consolidated Statements of Changes in Equity (Parenthetical) - CAD / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Cash dividends declared on common stock	CAD 1.995	CAD 1.6625
Series A Preferred Stock [Member]
Cash dividends declared on preferred stock	0.6388
Series B Preferred Stock [Member]
Cash dividends declared on preferred stock	0.5724
Series E Preferred Stock [Member]
Cash dividends declared on preferred stock	CAD 1.125

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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- Definition

Aggregate dividends declared during the period for each share of preferred stock outstanding.

+ References

No definition available.

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