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Financial Instruments (Details 4) (USD $)
3 Months Ended 9 Months Ended
Jul. 31, 2011
Jul. 31, 2010
Jul. 31, 2011
Jul. 31, 2010
Oct. 31, 2010
Effect of cash flow hedges on earnings          
Gain (loss) recognized in OCI on derivative (effective portion), cash flow hedges $ 95,000,000 $ 143,000,000 $ (584,000,000) $ 828,000,000  
Gain (loss) reclassified from Accumulated OCI into income (effective portion), cash flow hedges (339,000,000) 396,000,000 (661,000,000) 497,000,000  
Gain recognized in income on derivative (ineffective portion and amount excluded from effectiveness testing), cash flow hedges 1,000,000 1,000,000 4,000,000 7,000,000  
Loss expected to be reclassified from Accumulated OCI into earnings in next 12 months     162,000,000    
Effect of derivative instruments not designated as hedging instruments on earnings          
Gain (Loss) recognized in income on derivatives not designated as hedges (71,000,000) (127,000,000) (756,000,000) (183,000,000)  
Fair value and carrying value of debt          
Fair value, short- and long-term debt 26,000,000,000   26,000,000,000   22,500,000,000
Carrying value, short- and long-term debt 25,700,000,000   25,700,000,000   22,300,000,000
Interest rate contracts | Interest and other, net
         
Effect of fair value hedges on earnings          
Gain (Loss) recognized in income on derivative, fair value hedges 68,000,000 215,000,000 (135,000,000) 242,000,000  
Gain (Loss) recognized in income on related hedged item, fair value hedges (63,000,000) (206,000,000) 138,000,000 (230,000,000)  
Effect of derivative instruments not designated as hedging instruments on earnings          
Gain (Loss) recognized in income on derivatives not designated as hedges     3,000,000 5,000,000  
Foreign exchange contracts | Net revenue
         
Effect of cash flow hedges on earnings          
Gain (loss) recognized in OCI on derivative (effective portion), cash flow hedges 115,000,000 114,000,000 (565,000,000) 769,000,000  
Gain (loss) reclassified from Accumulated OCI into income (effective portion), cash flow hedges (333,000,000) 375,000,000 (653,000,000) 433,000,000  
Foreign exchange contracts | Cost of products
         
Effect of cash flow hedges on earnings          
Gain (loss) recognized in OCI on derivative (effective portion), cash flow hedges 10,000,000 45,000,000 28,000,000 38,000,000  
Gain (loss) reclassified from Accumulated OCI into income (effective portion), cash flow hedges 9,000,000 17,000,000 31,000,000 44,000,000  
Foreign exchange contracts | Other operating expenses
         
Effect of cash flow hedges on earnings          
Gain (loss) recognized in OCI on derivative (effective portion), cash flow hedges   (1,000,000) 5,000,000 (1,000,000)  
Gain (loss) reclassified from Accumulated OCI into income (effective portion), cash flow hedges 2,000,000 (1,000,000) 4,000,000    
Foreign exchange contracts | Interest and other, net
         
Effect of cash flow hedges on earnings          
Gain (loss) recognized in OCI on derivative (effective portion), cash flow hedges (37,000,000) 11,000,000 (57,000,000) 12,000,000  
Gain (loss) reclassified from Accumulated OCI into income (effective portion), cash flow hedges (20,000,000)   (52,000,000)    
Effect of net investment hedges on earnings          
Gain (loss) recognized in OCI on derivative (effective portion), net investment hedges - foreign exchange contracts (21,000,000) 25,000,000 (118,000,000) (19,000,000)  
Effect of derivative instruments not designated as hedging instruments on earnings          
Gain (Loss) recognized in income on derivatives not designated as hedges (49,000,000) (142,000,000) (747,000,000) (205,000,000)  
Foreign exchange contracts - joint venture | Net revenue
         
Effect of cash flow hedges on earnings          
Gain (loss) recognized in OCI on derivative (effective portion), cash flow hedges 7,000,000 (26,000,000) 5,000,000 10,000,000  
Gain (loss) reclassified from Accumulated OCI into income (effective portion), cash flow hedges 3,000,000 5,000,000 9,000,000 20,000,000  
Other derivatives | Interest and other, net
         
Effect of derivative instruments not designated as hedging instruments on earnings          
Gain (Loss) recognized in income on derivatives not designated as hedges $ (22,000,000) $ 15,000,000 $ (12,000,000) $ 17,000,000