v2.4.0.8
Earnings Per Share - Textual (Detail)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Earnings Per Share [Abstract]      
Period for which awards under employee stock option are vested 3 years    
Common shares issuable under share-based compensation plans excluded from diluted earnings per common share because the effect would have been antidilutive 25 104 169