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Capital Stock (Detail)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Stockholders' Equity Note [Abstract]      
Beginning balance 162,514,098 161,131,547 159,909,052
Stock options/SARs exercised 278,916 926,425 862,774
Restricted stock grants 401,122 354,674 326,591
Restricted stock units vested 119,480 57,824  
Treasury shares 29,278 43,628 33,130
Ending balance 163,342,894 162,514,098 161,131,547