v2.3.0.11
Derivative Financial Instruments (Balance Sheet Classification of Financial Instruments) (Details) (USD $)
In Millions
Apr. 30, 2011
Jan. 31, 2011
Apr. 30, 2010
Other assets and deferred charges $ 4,068 $ 4,129 $ 3,910
Long-term debt 45,486 40,692 32,668
Deferred income taxes and other 6,902 6,682 5,152
Fair Value Instruments [Member]
     
Other assets and deferred charges 249 267  
Asset subtotals 249 267  
Long-term debt 249 267  
Deferred income taxes and other      
Liability subtotals 249 267  
Net Investment Instrument [Member]
     
Other assets and deferred charges 165 233  
Asset subtotals 165 233  
Long-term debt      
Deferred income taxes and other      
Liability subtotals      
Cash Flow Instruments [Member]
     
Other assets and deferred charges 241 238  
Asset subtotals 241 238  
Long-term debt      
Deferred income taxes and other 18 18  
Liability subtotals $ 18 $ 18