XML 112 R82.htm IDEA: XBRL DOCUMENT
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SHARE CAPITAL - Narrative (Details) - $ / shares |  |  |  |  |  | 12 Months Ended
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May 16, 2017 | Mar. 01, 2017 | Nov. 02, 2016 | Mar. 02, 2016 | Mar. 04, 2015 | Dec. 31, 2017
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Quarterly dividend declared subsequent to year end (in CAD per share) |  |  |  |  |  | $ 0.335
Quarterly dividend declared (in CAD per share) |  | $ 0.275 | $ 0.25 | $ 0.23 | $ 0.23 |
Shares authorized to be repurchased through Normal Course Issuer Bid (in shares) | 27,931,135 |  |  |  |  |
Share repurchase term | 12 months |  |  |  |  |
Stock options |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Vesting term |  |  |  |  |  | 5 years
Shares that may be reserved for issuance as a percentage of common shares outstanding |  |  |  |  |  | 9.00%
Stock options | Bottom of range |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Expiration term |  |  |  |  |  | 5 years
Stock options | Top of range |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Expiration term |  |  |  |  |  | 6 years

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