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Schedule of Liability Activity for Integration Programs (Detail) (Cadbury Integration Program, USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Cadbury Integration Program
 
Integration Program [Line Items]  
Balance at beginning of period $ 145
Charges (2)
Cash spent (22)
Currency / other (15)
Balance at end of period $ 106