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Financial Instruments - Gross Notional and Fair Value of Instruments in the Balance Sheets (Details) - USD ($) $ in Millions	Jan. 31, 2020	Oct. 31, 2019
Derivatives, Fair Value
Outstanding Gross Notional	$ 24,308	$ 24,189
Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	217	215
Long-Term Financing Receivables and Other Assets
Derivatives, Fair Value
Derivative asset, fair value	279	253
Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value	91	107
Long-Term Other Liabilities
Derivatives, Fair Value
Derivative liability, fair value	39	40
Derivatives designated as hedging instruments
Derivatives, Fair Value
Outstanding Gross Notional	17,541	17,694
Derivatives designated as hedging instruments | Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	187	195
Derivatives designated as hedging instruments | Long-Term Financing Receivables and Other Assets
Derivatives, Fair Value
Derivative asset, fair value	276	250
Derivatives designated as hedging instruments | Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value	65	74
Derivatives designated as hedging instruments | Long-Term Other Liabilities
Derivatives, Fair Value
Derivative liability, fair value	39	37
Derivatives designated as hedging instruments | Fair value hedges | Interest rate contracts
Derivatives, Fair Value
Outstanding Gross Notional	6,850	6,850
Derivatives designated as hedging instruments | Fair value hedges | Interest rate contracts | Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	0	0
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	96	72
Derivatives designated as hedging instruments | Fair value hedges | Interest rate contracts | Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value	6	11
Derivatives designated as hedging instruments | Fair value hedges | Interest rate contracts | Long-Term Other Liabilities
Derivatives, Fair Value
Derivative liability, fair value	0	0
Derivatives designated as hedging instruments | Cash flow hedges | Interest rate contracts
Derivatives, Fair Value
Outstanding Gross Notional	500	500
Derivatives designated as hedging instruments | Cash flow hedges | Interest rate contracts | Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	0	0
Derivatives designated as hedging instruments | Cash flow hedges | Interest rate contracts | Long-Term Financing Receivables and Other Assets
Derivatives, Fair Value
Derivative asset, fair value	0	1
Derivatives designated as hedging instruments | Cash flow hedges | Interest rate contracts | Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value	0	0
Derivatives designated as hedging instruments | Cash flow hedges | Interest rate contracts | Long-Term Other Liabilities
Derivatives, Fair Value
Derivative liability, fair value	0	0
Derivatives designated as hedging instruments | Cash flow hedges | Foreign exchange contracts
Derivatives, Fair Value
Outstanding Gross Notional	8,401	8,578
Derivatives designated as hedging instruments | Cash flow hedges | Foreign exchange contracts | Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	148	164
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	136	141
Derivatives designated as hedging instruments | Cash flow hedges | Foreign exchange contracts | Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value	42	45
Derivatives designated as hedging instruments | Cash flow hedges | Foreign exchange contracts | Long-Term Other Liabilities
Derivatives, Fair Value
Derivative liability, fair value	29	27
Derivatives designated as hedging instruments | Net investment hedges | Foreign exchange contracts
Derivatives, Fair Value
Outstanding Gross Notional	1,790	1,766
Derivatives designated as hedging instruments | Net investment hedges | Foreign exchange contracts | Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	39	31
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	44	36
Derivatives designated as hedging instruments | Net investment hedges | Foreign exchange contracts | Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value	17	18
Derivatives designated as hedging instruments | Net investment hedges | Foreign exchange contracts | Long-Term Other Liabilities
Derivatives, Fair Value
Derivative liability, fair value	10	10
Derivatives not designated as hedging instruments
Derivatives, Fair Value
Outstanding Gross Notional	6,767	6,495
Derivatives not designated as hedging instruments | Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	30	20
Derivatives not designated as hedging instruments | Long-Term Financing Receivables and Other Assets
Derivatives, Fair Value
Derivative asset, fair value	3	3
Derivatives not designated as hedging instruments | Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value	26	33
Derivatives not designated as hedging instruments | Long-Term Other Liabilities
Derivatives, Fair Value
Derivative liability, fair value	0	3
Derivatives not designated as hedging instruments | Foreign exchange contracts
Derivatives, Fair Value
Outstanding Gross Notional	6,653	6,398
Derivatives not designated as hedging instruments | Foreign exchange contracts | Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	29	17
Derivatives not designated as hedging instruments | Foreign exchange contracts | Long-Term Financing Receivables and Other Assets
Derivatives, Fair Value
Derivative asset, fair value	3	3
Derivatives not designated as hedging instruments | Foreign exchange contracts | Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value	25	33
Derivatives not designated as hedging instruments | Foreign exchange contracts | Long-Term Other Liabilities
Derivatives, Fair Value
Derivative liability, fair value	0	3
Derivatives not designated as hedging instruments | Other derivatives
Derivatives, Fair Value
Outstanding Gross Notional	114	97
Derivatives not designated as hedging instruments | Other derivatives | Other Current Assets
Derivatives, Fair Value
Derivative asset, fair value	1	3
Derivatives not designated as hedging instruments | Other derivatives | Long-Term Financing Receivables and Other Assets
Derivatives, Fair Value
Derivative asset, fair value	0	0
Derivatives not designated as hedging instruments | Other derivatives | Other Accrued Liabilities
Derivatives, Fair Value
Derivative liability, fair value	1	0
Derivatives not designated as hedging instruments | Other derivatives | Long-Term Other Liabilities
Derivatives, Fair Value
Derivative liability, fair value	$ 0	$ 0

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- Definition

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