XML 36 R68.htm IDEA: XBRL DOCUMENT v3.19.3
Capital Stock - Schedule of Share-based Compensation, Stock Options, Activity (Details) - Employee Stock Option [Member] - $ / shares
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Options outstanding, beginning of period 5,465,046 5,082,100
Granted 1,016,882 1,081,120
Exercised (86,337) (12,750)
Forfeited (329,346) (51,238)
Expired (299,134) (490,042)
Cancelled (26,281) (100,596)
Options outstanding, end of period 5,740,830 5,508,594
Options exercisable, end of period 4,511,208 3,902,341
Options outstanding, weighted average exercise price per share, beginning of period $ 27.63 $ 29.31
Granted, weighted average exercise price per share 20.66 21.96
Exercised, weighted average exercise price per share 20.15 17.08
Forfeited, weighted average exercise price per share 23.60 31.14
Expired, weighted average exercise price per share 25.82 31.61
Cancelled, weighted average exercise price per share 31.08 30.32
Options outstanding, weighted average exercise price per share, end of period 26.82 27.66
Options exercisable, weighted average exercise price per share, end of period $ 27.76 $ 28.58