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Financial Instruments (Details 4) (USD $)
3 Months Ended 6 Months Ended
Apr. 30, 2011
Apr. 30, 2010
Apr. 30, 2011
Apr. 30, 2010
Oct. 31, 2010
Effect of cash flow hedges on earnings          
Gain (loss) recognized in OCI on derivative (effective portion), cash flow hedges $ (771,000,000) $ 238,000,000 $ (679,000,000) $ 685,000,000  
Gain (loss) reclassified from Accumulated OCI into income (effective portion), cash flow hedges (336,000,000) 203,000,000 (322,000,000) 101,000,000  
Gain recognized in income on derivative (ineffective portion and amount excluded from effectiveness testing), cash flow hedges 1,000,000 2,000,000 3,000,000 6,000,000  
Loss expected to be reclassified from Accumulated OCI into earnings in next 12 months     (444,000,000)    
Effect of derivative instruments not designated as hedging instruments on earnings          
Gain (Loss) recognized in income on derivatives not designated as hedges (608,000,000) (110,000,000) (685,000,000) (56,000,000)  
Fair value and carrying value of debt          
Fair value, short- and long-term debt 18,600,000,000   18,600,000,000   22,500,000,000
Carrying value, short- and long-term debt 18,600,000,000   18,600,000,000   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 (25,000,000) 18,000,000 (203,000,000) 27,000,000  
Gain (Loss) recognized in income on related hedged item, fair value hedges 27,000,000 (15,000,000) 201,000,000 (24,000,000)  
Effect of derivative instruments not designated as hedging instruments on earnings          
Gain (Loss) recognized in income on derivatives not designated as hedges 1,000,000 6,000,000 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 (780,000,000) 230,000,000 (680,000,000) 655,000,000  
Gain (loss) reclassified from Accumulated OCI into income (effective portion), cash flow hedges (296,000,000) 188,000,000 (320,000,000) 58,000,000  
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 27,000,000 (12,000,000) 18,000,000 (7,000,000)  
Gain (loss) reclassified from Accumulated OCI into income (effective portion), cash flow hedges (4,000,000) 12,000,000 22,000,000 27,000,000  
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 7,000,000   5,000,000    
Gain (loss) reclassified from Accumulated OCI into income (effective portion), cash flow hedges 1,000,000   2,000,000 1,000,000  
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 (36,000,000) (5,000,000) (20,000,000) 1,000,000  
Gain (loss) reclassified from Accumulated OCI into income (effective portion), cash flow hedges (39,000,000) (4,000,000) (32,000,000)    
Effect of net investment hedges on earnings          
Gain (loss) recognized in OCI on derivative (effective portion), net investment hedges - foreign exchange contracts (92,000,000) (47,000,000) (97,000,000) (44,000,000)  
Effect of derivative instruments not designated as hedging instruments on earnings          
Gain (Loss) recognized in income on derivatives not designated as hedges (621,000,000) (129,000,000) (698,000,000) (63,000,000)  
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 11,000,000 25,000,000 (2,000,000) 36,000,000  
Gain (loss) reclassified from Accumulated OCI into income (effective portion), cash flow hedges 2,000,000 7,000,000 6,000,000 15,000,000  
Foreign exchange contracts - joint venture | Interest and other, net
         
Effect of cash flow hedges on earnings          
Gain recognized in income on derivative (ineffective portion and amount excluded from effectiveness testing), cash flow hedges 1,000,000 2,000,000 3,000,000 6,000,000  
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 $ 12,000,000 $ 13,000,000 $ 10,000,000 $ 2,000,000