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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Indefinite-lived Intangible Assets [Line Items]        
Maturity period of investments description   Three months or less    
Minimum derivative financial instrument's term (months)   2 months    
Maximum derivative financial instrument's term (months)   24 months    
Allowances for excess and obsolete inventories   $ 396 $ 338  
Depreciation expense related to property, plant and equipment   392 323 279
Impairment of long-lived assets   0 0 0
Goodwill   9,049 7,172 6,151
Indefinite-lived intangible assets   5,055 4,743  
Estimated useful lives of intangible assets, minimum   2 years    
Estimated useful lives of intangible assets, maximum   30 years    
Amortization expense   360    
Number of years as first period of amortization   5 years    
Net foreign currency transaction gains (losses)   26 21 10
Net investment in Venezuela   39    
Devaluation charges 12      
Net allowances for doubtful accounts   132 120  
Compensation cost charged against income for share-based compensation arrangements   92 80 73
Income tax benefit recognized for share-based compensation arrangements   28 24 17
Anti-dilutive stock options outstanding   7 5 3
Indefinite-lived trade names [Member]
        
Indefinite-lived Intangible Assets [Line Items]        
Indefinite-lived intangible assets   $ 643