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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]        
Allowances for excess and obsolete inventories   $ 396 $ 338  
Depreciation expense related to property, plant and equipment   381 315 275
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)   24 18 10
Devaluation charges 12      
Net investment in Venezuela   39    
Net allowances for doubtful accounts   132 120  
Compensation cost charged against income for share-based compensation arrangements   86 74 68
Income tax benefit recognized for share-based compensation arrangements   26 22 15
Anti-dilutive stock options outstanding   7 5 3
Indefinite-lived trade names [Member]
        
Indefinite-lived Intangible Assets [Line Items]        
Indefinite-lived intangible assets   $ 643    
Minimum [Member]
        
Indefinite-lived Intangible Assets [Line Items]        
Maximum Derivative Financial Instrument's Term (months)   2 months    
Maximum [Member]
        
Indefinite-lived Intangible Assets [Line Items]        
Maximum Derivative Financial Instrument's Term (months)   24 months