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Financial Instruments - Hedges (Details) - USD ($)
$ in Millions
3 Months Ended
Jan. 31, 2017
Oct. 31, 2016
Derivatives, Fair Value    
Period within which the funds held as collateral and posted as collateral are transferred from or to counterparties 2 days  
Collateralized arrangements in net liability position $ 135 $ 9
Outstanding Gross Notional 30,106 35,300
Other Current Assets    
Derivatives, Fair Value    
Derivative asset, fair value 376 449
Long-Term Financing Receivables and Other Assets    
Derivatives, Fair Value    
Derivative asset, fair value 175 320
Other Accrued Liabilities    
Derivatives, Fair Value    
Derivative liability, fair value 172 168
Long-Term Other Liabilities    
Derivatives, Fair Value    
Derivative liability, fair value $ 225 60
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    
Outstanding Gross Notional $ 18,145 18,646
Derivatives designated as hedging instruments | Other Current Assets    
Derivatives, Fair Value    
Derivative asset, fair value 285 349
Derivatives designated as hedging instruments | Long-Term Financing Receivables and Other Assets    
Derivatives, Fair Value    
Derivative asset, fair value 170 309
Derivatives designated as hedging instruments | Other Accrued Liabilities    
Derivatives, Fair Value    
Derivative liability, fair value 49 63
Derivatives designated as hedging instruments | Long-Term Other Liabilities    
Derivatives, Fair Value    
Derivative liability, fair value 217 49
Derivatives designated as hedging instruments | Fair value hedges: | Interest rate contracts    
Derivatives, Fair Value    
Outstanding Gross Notional 9,500 9,500
Derivatives designated as hedging instruments | Fair value hedges: | Interest rate contracts | Long-Term Financing Receivables and Other Assets    
Derivatives, Fair Value    
Derivative asset, fair value 0 109
Derivatives designated as hedging instruments | Fair value hedges: | Interest rate contracts | Long-Term Other Liabilities    
Derivatives, Fair Value    
Derivative liability, fair value   6
Derivatives designated as hedging instruments | Cash flow hedges: | Foreign exchange contracts    
Derivatives, Fair Value    
Outstanding Gross Notional 6,716 7,255
Derivatives designated as hedging instruments | Cash flow hedges: | Foreign exchange contracts | Other Current Assets    
Derivatives, Fair Value    
Derivative asset, fair value 242 296
Derivatives designated as hedging instruments | Cash flow hedges: | Foreign exchange contracts | Long-Term Financing Receivables and Other Assets    
Derivatives, Fair Value    
Derivative asset, fair value 149 172
Derivatives designated as hedging instruments | Cash flow hedges: | Foreign exchange contracts | Other Accrued Liabilities    
Derivatives, Fair Value    
Derivative liability, fair value 32 40
Derivatives designated as hedging instruments | Cash flow hedges: | Foreign exchange contracts | Long-Term Other Liabilities    
Derivatives, Fair Value    
Derivative liability, fair value 20 15
Derivatives designated as hedging instruments | Net investment hedges: | Foreign exchange contracts    
Derivatives, Fair Value    
Outstanding Gross Notional 1,929 1,891
Derivatives designated as hedging instruments | Net investment hedges: | Foreign exchange contracts | Other Current Assets    
Derivatives, Fair Value    
Derivative asset, fair value 43 53
Derivatives designated as hedging instruments | Net investment hedges: | Foreign exchange contracts | Long-Term Financing Receivables and Other Assets    
Derivatives, Fair Value    
Derivative asset, fair value 21 28
Derivatives designated as hedging instruments | Net investment hedges: | Foreign exchange contracts | Other Accrued Liabilities    
Derivatives, Fair Value    
Derivative liability, fair value 17 23
Derivatives designated as hedging instruments | Net investment hedges: | Foreign exchange contracts | Long-Term Other Liabilities    
Derivatives, Fair Value    
Derivative liability, fair value 38 28
Derivatives not designated as hedging instruments    
Derivatives, Fair Value    
Outstanding Gross Notional 11,961 16,654
Derivatives not designated as hedging instruments | Other Current Assets    
Derivatives, Fair Value    
Derivative asset, fair value 91 100
Derivatives not designated as hedging instruments | Long-Term Financing Receivables and Other Assets    
Derivatives, Fair Value    
Derivative asset, fair value 5 11
Derivatives not designated as hedging instruments | Other Accrued Liabilities    
Derivatives, Fair Value    
Derivative liability, fair value 123 105
Derivatives not designated as hedging instruments | Long-Term Other Liabilities    
Derivatives, Fair Value    
Derivative liability, fair value 8 11
Derivatives not designated as hedging instruments | Foreign exchange contracts    
Derivatives, Fair Value    
Outstanding Gross Notional 11,801 16,496
Derivatives not designated as hedging instruments | Foreign exchange contracts | Other Current Assets    
Derivatives, Fair Value    
Derivative asset, fair value 90 100
Derivatives not designated as hedging instruments | Foreign exchange contracts | Long-Term Financing Receivables and Other Assets    
Derivatives, Fair Value    
Derivative asset, fair value 5 11
Derivatives not designated as hedging instruments | Foreign exchange contracts | Other Accrued Liabilities    
Derivatives, Fair Value    
Derivative liability, fair value 123 103
Derivatives not designated as hedging instruments | Foreign exchange contracts | Long-Term Other Liabilities    
Derivatives, Fair Value    
Derivative liability, fair value 8 11
Derivatives not designated as hedging instruments | Other derivatives    
Derivatives, Fair Value    
Outstanding Gross Notional 160 158
Derivatives not designated as hedging instruments | Other derivatives | Other Current Assets    
Derivatives, Fair Value    
Derivative asset, fair value 1 0
Derivatives not designated as hedging instruments | Other derivatives | Other Accrued Liabilities    
Derivatives, Fair Value    
Derivative liability, fair value $ 0 $ 2