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Acquisitions, Goodwill, and Acquired Intangible Assets - Business Acquisitions Pro Forma Financial Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Business Combinations [Abstract]    
Net sales $ 61,118 $ 48,157
Net income (loss) $ (2) $ 499