XML 96 R77.htm IDEA: XBRL DOCUMENT v3.6.0.2
Capital Stock - Common Stock and Treasury Stock Activity (Detail) - shares
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Common shares    
Balance at the beginning of the year 159,906,032 158,140,128
Stock plan shares issued 2,518,071 3,249,892
Shares surrendered by optionees (204,538) (392,921)
Common stock repurchases (8,807,515) (1,091,067)
Balance at the end of the year 153,412,050 159,906,032
Treasury shares    
Balance at the beginning of the year 15,293,877 13,809,889
Stock plan shares issued 0 0
Shares surrendered by optionees 204,538 392,921
Common stock repurchases 8,807,515 1,091,067
Balance at the end of the year 24,305,930 15,293,877