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Earnings Per Share - Additional Information (Detail)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Nonqualified stock options and non-participating RSUs excluded from the calculation of diluted net income per common share 0.6 0.7 1.0