XML 158 R109.htm IDEA: XBRL DOCUMENT v3.4.0.3
Capital Stock - Summary of Stock Option Activity and Related Information (Detail) - $ / shares
shares in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]      
Options Outstanding - beginning of year 2,710 4,237 5,285
Options, Granted 265 15 73
Options, Exercised (36) (1,528) (1,039)
Options, Forfeited/Expired (139) (14) (82)
Options Outstanding - end of year 2,800 2,710 4,237
Options Exercisable - end of year 2,500 2,508 3,848
Weighted-Average Exercise Price, Outstanding - beginning of year $ 36.61 $ 36.33 $ 34.40
Weighted-Average Exercise Price, Granted 43.99 56.76 34.07
Weighted-Average Exercise Price, Exercised 33.79 36.10 26.21
Weighted-Average Exercise Price, Forfeited/Expired 46.80 28.51 38.46
Weighted-Average Exercise Price, Outstanding - end of year 36.84 36.61 36.33
Weighted-Average Exercise Price, Exercisable - end of year $ 36.03 $ 37.03 $ 37.03