XML 155 R116.htm IDEA: XBRL DOCUMENT v3.6.0.2
Stock-Based Compensation - Stock Option Plan (Detail)
CAD / shares in Units, CAD in Millions
12 Months Ended
Dec. 31, 2016
CAD
CAD / shares
shares
Number of options, Options outstanding and Nonvested options (in shares)  
Outstanding, January 1, 2016 | shares 2,407,973
New options granted | shares 403,740
Exercised | shares (269,491)
Vested | shares 0
Forfeited | shares 90,340
Expired | shares (1,800)
Outstanding, December 31, 2016 | shares 2,450,082
Vested or expected to vest at December 31, 2015 | shares 2,437,475
Exercisable, December 31, 2016 | shares 1,599,915
Weighted average exercise price, Options outstanding  
Outstanding, January 1 (in dollars per share) | CAD / shares CAD 113.01
New options granted (in dollars per share) | CAD / shares 161.06
Exercised (in dollars per share) | CAD / shares 74.99
Vested (in dollars per share) | CAD / shares 0
Forfeited (in dollars per share) | CAD / shares 186.95
Expired (in dollars per share) | CAD / shares 60.84
Outstanding at December 31 (in dollar per share) | CAD / shares 121.95
Vested or expected to vest at December 31, 2015 (in dollars per share) | CAD / shares 121.62
Exercisable at December 31 (in dollars per share) | CAD / shares CAD 93.79
Weighted average grant date fair value, Nonvested options  
Weighted average remaining term of vested or expected to vest options 6 years 10 months 7 days
Aggregate intrinsic value of vested or expected to vest options | CAD CAD 181
Nonvested Options [Member]  
Number of options, Options outstanding and Nonvested options (in shares)  
Outstanding, January 1, 2016 | shares 984,979
New options granted | shares 403,740
Exercised | shares 0
Vested | shares (449,712)
Forfeited | shares 88,840
Expired | shares 0
Outstanding, December 31, 2016 | shares 850,167
Weighted average grant date fair value, Nonvested options  
Outstanding, January 1 (in dollars per share) | CAD / shares CAD 41.88
New options granted (in dollars per share) | CAD / shares 39.01
Exercised (in dollars per share) | CAD / shares 0
Vested (in dollars per share) | CAD / shares 33.70
Forfeited (in dollars per share) | CAD / shares 42.42
Expired (in dollars per share) | CAD / shares 0.00
Outstanding at December 31 (in dollars per share) | CAD / shares CAD 44.49