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Derivative Instruments and Hedging Activities - Carrying Values of Derivative Instruments Recorded in Consolidated Balance Sheet (Detail) (Derivative Instruments [Member], USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Derivative Instruments [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Current Assets: Derivative instruments    $ 1
Current Liabilities: Derivative instruments $ 224 $ 299