v2.4.0.8
Segment Reporting - Reconciliation of Segment Profits to Income Before Taxes (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting Information [Line Items]      
Income Before Taxes $ 5,545 $ 8,739 $ 7,334
Interest income 264 232 145
Interest expense (801) (714) (695)
Equity income from affiliates 404 642 610
Depreciation and amortization (6,988) (6,978) (7,427)
Research and development (7,503) (8,168) (8,467)
Restructuring costs (1,709) (664) (1,306)
Litigation settlement charges   493 500
Pharmaceutical segment [Member]
      
Segment Reporting Information [Line Items]      
Income Before Taxes 22,983 25,852 25,617
Equity income from affiliates 88 36 59
Depreciation and amortization (27) (25) (51)
Other segments [Member]
      
Segment Reporting Information [Line Items]      
Income Before Taxes 3,094 3,163 2,995
Equity income from affiliates 475 504 510
Depreciation and amortization (22) (20) (20)
Operating segments [Member]
      
Segment Reporting Information [Line Items]      
Income Before Taxes 26,077 29,015 28,612
Equity income from affiliates 563 540 569
Depreciation and amortization (49) (45) (71)
Other [Member]
      
Segment Reporting Information [Line Items]      
Income Before Taxes 19 26 (11)
Unallocated [Member]
      
Segment Reporting Information [Line Items]      
Interest income 264 232 145
Interest expense (801) (714) (695)
Equity income from affiliates (159) 102 41
Depreciation and amortization (2,250) (2,059) (2,412)
Research and development (6,381) (7,126) (7,251)
Amortization of purchase accounting adjustments (4,690) (4,872) (5,000)
Restructuring costs (1,709) (664) (1,306)
Other unallocated, net (4,825) (4,708) (4,289)
ENHANCE Litigation [Member]
      
Segment Reporting Information [Line Items]      
Litigation settlement charges (493)    
ENHANCE Litigation [Member] | Unallocated [Member]
      
Segment Reporting Information [Line Items]      
Litigation settlement charges 0 (493) 0
Arbitration settlement [Member] | Unallocated [Member]
      
Segment Reporting Information [Line Items]      
Litigation settlement charges $ 0 $ 0 $ (500)