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Capital Stock - Additional Information (Detail) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Capital Stock [Line Items]    
The par value of common stock $ 0.40  
Common stock shares authorized 800,000,000 800,000,000
Preferred stock shares authorized 250,000  
Preferred stock par value per share $ 4.00  
Preferred stock shares outstanding 0  
Preferred stock shares issued 0