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SHARE CAPITAL - EARNINGS PER COMMON SHARES (Details) - CAD / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
EARNINGS PER COMMON SHARE
Prorata weighted average interest in entity's own common shares	12,000,000	12,000,000
Weighted average number of shares outstanding diluted
Weighted average shares outstanding	847,000,000	829,000,000
Effect of dilutive options (in shares)	11,000,000	11,000,000
Diluted weighted average shares outstanding	858,000,000	840,000,000
Stock options
Weighted average number of shares outstanding diluted
Antidilutive securities excluded from the diluted earnings per common share calculation (in shares)	7,960,028	6,058,580
Weighted average exercise price of antidilutive securities (in Canadian dollars per share)	CAD 55.81	CAD 48.78

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- Definition

Represents the weighted average exercise price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

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- Definition

Represents the entity's weighted average interest in its own common shares due to a reciprocal investment.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Antidilution
-URI http://asc.fasb.org/extlink&oid=6505113

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6510752

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6508534

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-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 1
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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Topic 260
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