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Interest Expense, Net - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Net Investment Income [Line Items]      
Capitalized borrowing cost $ 0 $ 0 $ 0
Floating Rate Notes [Member]
     
Net Investment Income [Line Items]      
Interest income (expense), net   2 6
Floating Rate Notes [Member] | Maximum [Member]
     
Net Investment Income [Line Items]      
Interest income (expense), net $ 1