Quarterly report pursuant to Section 13 or 15(d)

Activity in Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail)

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Activity in Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) (USD $)
In Millions
6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Foreign currency translation gain (loss)
   
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Aggregate adjustment for the period, tax $ (9) $ (43)
Unrealized gain (loss) on marketable securities, net of tax
   
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Current period changes in fair value, tax effect 5 12
Reclassification to earnings, tax effect (8) 9
Unrealized gain (loss) on cash flow hedges, net of tax
   
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Current period changes in fair value, tax effect (50) 15
Reclassification to earnings, tax effect 9 (9)
Unrecognized pension and postretirement benefit costs, net of tax
   
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Reclassification to earnings, tax effect 91 53
Adjustment for Early Retirement Reinsurance Program, tax effect $ 4 $ 0