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Stock-based Compensation Plans - Stock Option Activity (Details) CAD / shares in Units, CAD in Millions | 12 Months Ended
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Dec. 31, 2016 CAD CAD / shares shares
Total Options, Number of Options |
Options outstanding, beginning balance (shares) | shares | 4,416,454
Granted (shares) | shares | 788,188
Awards paid out (shares) | shares | (1,041,450)
Cancelled/Forfeited (shares) | shares | (3,000)
Options outstanding, ending balance (shares) | shares | 4,160,192
Options vested, number of options (shares) | shares | 2,345,174
Total Options, Weighted Average Exercise Price |
Options outstanding, beginning balance (cad per share) | CAD / shares | CAD 32.12
Granted (cad per share) | CAD / shares | 37.30
Exercised (cad per share) | CAD / shares | 26.74
Cancelled/Forfeited (cad per share) | CAD / shares | 31.68
Options outstanding, ending balance (cad per share) | CAD / shares | 34.45
Options vested, weighted average exercise price (cad per share) | CAD / shares | CAD 33.14
Non-vested Options, Number of Options |
Options outstanding, beginning balance (shares) | shares | 1,936,532
Granted (shares) | shares | 788,188
Vested (shares) | shares | (906,702)
Cancelled/Forfeited (shares) | shares | (3,000)
Options outstanding, ending balance (shares) | shares | 1,815,018
Non-vested Options, Weighted Average Grant Date Fair Value |
Options outstanding, beginning balance (cad per share) | CAD / shares | CAD 3.30
Granted (cad per share) | CAD / shares | 2.41
Vested (cad per share) | CAD / shares | 3.57
Cancelled/Forfeited (cad per share) | CAD / shares | 3.66
Options outstanding, ending balance (cad per share) | CAD / shares | CAD 2.78
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Unrecognized compensation expense | CAD | CAD 5
Weighted average remaining term of vested options | 6 years
Aggregate intrinsic value | CAD | CAD 20
Options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Remaining weighted average period to recognize compensation expense (years) | 3 years

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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price of options that were either forfeited or expired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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