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Financial Instruments (Detail 3) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2013
Financial Instruments      
Derivative, Collateral, Obligation to Return Cash $ 9 $ 407  
Financial Collateral   29  
Derivatives, Fair Value      
Total derivatives, gross notional amount 23,162 44,204  
Derivative asset, fair value 258 535  
Derivative liability, fair value 304 330  
Collateralized arrangements in net liability position 138 62  
Other Comprehensive Income (Loss), Net of Tax (421) (2,103) $ 1,781
Other Current Assets      
Derivatives, Fair Value      
Derivative Asset, Fair Value Gross Asset 210    
Other Non-Current Assets      
Derivatives, Fair Value      
Derivative Asset, Fair Value Gross Asset   110  
Other Accrued Liabilities      
Derivatives, Fair Value      
Derivative Liability, Fair Value Gross Liability 202 180  
Other Non-Current Liabilities      
Derivatives, Fair Value      
Derivative Asset, Fair Value Gross Asset 48    
Derivative Liability, Fair Value Gross Liability $ 102 150  
Other derivatives      
Derivatives, Fair Value      
Derivative Asset, Fair Value Gross Asset   425  
Cash flow hedges      
Derivatives, Fair Value      
Maturity period of foreign currency cash flow hedges 12 months    
Cash flow hedges | Minimum      
Derivatives, Fair Value      
Duration of lease term for which lease-related forward contracts and intercompany lease loan forward contracts can be extended 2 years    
Cash flow hedges | Maximum      
Derivatives, Fair Value      
Duration of lease term for which lease-related forward contracts and intercompany lease loan forward contracts can be extended 5 years    
Derivatives designated as hedging instruments      
Derivatives, Fair Value      
Total derivatives, gross notional amount   23,558  
Derivatives designated as hedging instruments | Other Current Assets      
Derivatives, Fair Value      
Derivative Asset, Fair Value Gross Asset $ 172 347  
Derivatives designated as hedging instruments | Other Non-Current Assets      
Derivatives, Fair Value      
Derivative Asset, Fair Value Gross Asset 47 110  
Derivatives designated as hedging instruments | Other Accrued Liabilities      
Derivatives, Fair Value      
Derivative Liability, Fair Value Gross Liability 165 106  
Derivatives designated as hedging instruments | Other Non-Current Liabilities      
Derivatives, Fair Value      
Derivative Liability, Fair Value Gross Liability 79 143  
Derivatives designated as hedging instruments | Foreign currency contracts      
Derivatives, Fair Value      
Total derivatives, gross notional amount 14,034    
Derivatives designated as hedging instruments | Fair value hedges | Interest rate contracts      
Derivatives, Fair Value      
Total derivatives, gross notional amount 3,175 10,800  
Derivatives designated as hedging instruments | Fair value hedges | Interest rate contracts | Other Current Assets      
Derivatives, Fair Value      
Derivative Asset, Fair Value Gross Asset 1 3  
Derivatives designated as hedging instruments | Fair value hedges | Interest rate contracts | Other Non-Current Assets      
Derivatives, Fair Value      
Derivative Asset, Fair Value Gross Asset 37 102  
Derivatives designated as hedging instruments | Fair value hedges | Interest rate contracts | Other Non-Current Liabilities      
Derivatives, Fair Value      
Derivative Liability, Fair Value Gross Liability   55  
Derivatives designated as hedging instruments | Cash flow hedges | Foreign currency contracts      
Derivatives, Fair Value      
Total derivatives, gross notional amount 10,859 12,758  
Derivatives designated as hedging instruments | Cash flow hedges | Foreign currency contracts | Other Current Assets      
Derivatives, Fair Value      
Derivative Asset, Fair Value Gross Asset 171 344  
Derivatives designated as hedging instruments | Cash flow hedges | Foreign currency contracts | Other Non-Current Assets      
Derivatives, Fair Value      
Derivative Asset, Fair Value Gross Asset 10 8  
Derivatives designated as hedging instruments | Cash flow hedges | Foreign currency contracts | Other Accrued Liabilities      
Derivatives, Fair Value      
Derivative Liability, Fair Value Gross Liability 165 106  
Derivatives designated as hedging instruments | Cash flow hedges | Foreign currency contracts | Other Non-Current Liabilities      
Derivatives, Fair Value      
Derivative Liability, Fair Value Gross Liability 79 88  
Derivatives not designated as hedging instruments      
Derivatives, Fair Value      
Total derivatives, gross notional amount 9,128 20,646  
Derivatives not designated as hedging instruments | Other Current Assets      
Derivatives, Fair Value      
Derivative Asset, Fair Value Gross Asset 38 78  
Derivatives not designated as hedging instruments | Other Non-Current Assets      
Derivatives, Fair Value      
Derivative Asset, Fair Value Gross Asset 1    
Derivatives not designated as hedging instruments | Other Accrued Liabilities      
Derivatives, Fair Value      
Derivative Liability, Fair Value Gross Liability 37 74  
Derivatives not designated as hedging instruments | Other Non-Current Liabilities      
Derivatives, Fair Value      
Derivative Liability, Fair Value Gross Liability 23 7  
Derivatives not designated as hedging instruments | Foreign currency contracts      
Derivatives, Fair Value      
Total derivatives, gross notional amount 8,955 20,405  
Derivatives not designated as hedging instruments | Foreign currency contracts | Other Current Assets      
Derivatives, Fair Value      
Derivative Asset, Fair Value Gross Asset 33 74  
Derivatives not designated as hedging instruments | Foreign currency contracts | Other Non-Current Assets      
Derivatives, Fair Value      
Derivative Asset, Fair Value Gross Asset 1    
Derivatives not designated as hedging instruments | Foreign currency contracts | Other Accrued Liabilities      
Derivatives, Fair Value      
Derivative Liability, Fair Value Gross Liability 37 74  
Derivatives not designated as hedging instruments | Foreign currency contracts | Other Non-Current Liabilities      
Derivatives, Fair Value      
Derivative Liability, Fair Value Gross Liability 23 7  
Derivatives not designated as hedging instruments | Other derivatives      
Derivatives, Fair Value      
Total derivatives, gross notional amount 173 241  
Derivatives not designated as hedging instruments | Other derivatives | Other Current Assets      
Derivatives, Fair Value      
Derivative Asset, Fair Value Gross Asset $ 5 $ 4