Fair Value (Details) - USD ($) $ in Millions	Apr. 30, 2017	Oct. 31, 2016
Assets:
Cash Equivalents	$ 4,823	$ 4,660
Derivative Instruments	134	325
Liabilities:
Derivative Instruments	278	97
Fair value, short- and long-term debt	7,000	7,100
Carrying value, short- and long-term debt	6,800	6,800
Fair Value Measured on a Recurring Basis
Assets:
Total Assets	5,013	5,040
Liabilities:
Total Liabilities	278	97
Fair Value Measured on a Recurring Basis | Time deposits
Assets:
Cash Equivalents	2,790	2,092
Fair Value Measured on a Recurring Basis | Money market funds
Assets:
Cash Equivalents	2,033	2,568
Fair Value Measured on a Recurring Basis | Marketable equity securities
Assets:
Investments	11	9
Fair Value Measured on a Recurring Basis | Mutual funds
Assets:
Investments	45	44
Fair Value Measured on a Recurring Basis | Other debt securities
Assets:
Investments	0	2
Fair Value Measured on a Recurring Basis | Interest rate contracts
Assets:
Derivative Instruments	3	48
Liabilities:
Derivative Instruments	3	0
Fair Value Measured on a Recurring Basis | Foreign currency contracts
Assets:
Derivative Instruments	129	277
Liabilities:
Derivative Instruments	275	95
Fair Value Measured on a Recurring Basis | Other derivatives
Assets:
Derivative Instruments	2	0
Liabilities:
Derivative Instruments	0	2
Fair Value Measured on a Recurring Basis | Level 1
Assets:
Total Assets	2,083	2,617
Liabilities:
Total Liabilities	0	0
Fair Value Measured on a Recurring Basis | Level 1 | Time deposits
Assets:
Cash Equivalents	0	0
Fair Value Measured on a Recurring Basis | Level 1 | Money market funds
Assets:
Cash Equivalents	2,033	2,568
Fair Value Measured on a Recurring Basis | Level 1 | Marketable equity securities
Assets:
Investments	5	5
Fair Value Measured on a Recurring Basis | Level 1 | Mutual funds
Assets:
Investments	45	44
Fair Value Measured on a Recurring Basis | Level 1 | Other debt securities
Assets:
Investments	0	0
Fair Value Measured on a Recurring Basis | Level 1 | Interest rate contracts
Assets:
Derivative Instruments	0	0
Liabilities:
Derivative Instruments	0	0
Fair Value Measured on a Recurring Basis | Level 1 | Foreign currency contracts
Assets:
Derivative Instruments	0	0
Liabilities:
Derivative Instruments	0	0
Fair Value Measured on a Recurring Basis | Level 1 | Other derivatives
Assets:
Derivative Instruments	0	0
Liabilities:
Derivative Instruments	0	0
Fair Value Measured on a Recurring Basis | Level 2
Assets:
Total Assets	2,927	2,412
Liabilities:
Total Liabilities	271	96
Fair Value Measured on a Recurring Basis | Level 2 | Time deposits
Assets:
Cash Equivalents	2,790	2,092
Fair Value Measured on a Recurring Basis | Level 2 | Money market funds
Assets:
Cash Equivalents	0	0
Fair Value Measured on a Recurring Basis | Level 2 | Marketable equity securities
Assets:
Investments	6	4
Fair Value Measured on a Recurring Basis | Level 2 | Mutual funds
Assets:
Investments	0	0
Fair Value Measured on a Recurring Basis | Level 2 | Other debt securities
Assets:
Investments	0	2
Fair Value Measured on a Recurring Basis | Level 2 | Interest rate contracts
Assets:
Derivative Instruments	3	48
Liabilities:
Derivative Instruments	3	0
Fair Value Measured on a Recurring Basis | Level 2 | Foreign currency contracts
Assets:
Derivative Instruments	126	266
Liabilities:
Derivative Instruments	268	94
Fair Value Measured on a Recurring Basis | Level 2 | Other derivatives
Assets:
Derivative Instruments	2	0
Liabilities:
Derivative Instruments	0	2
Fair Value Measured on a Recurring Basis | Level 3
Assets:
Total Assets	3	11
Liabilities:
Total Liabilities	7	1
Fair Value Measured on a Recurring Basis | Level 3 | Time deposits
Assets:
Cash Equivalents	0	0
Fair Value Measured on a Recurring Basis | Level 3 | Money market funds
Assets:
Cash Equivalents	0	0
Fair Value Measured on a Recurring Basis | Level 3 | Marketable equity securities
Assets:
Investments	0	0
Fair Value Measured on a Recurring Basis | Level 3 | Mutual funds
Assets:
Investments	0	0
Fair Value Measured on a Recurring Basis | Level 3 | Other debt securities
Assets:
Investments	0	0
Fair Value Measured on a Recurring Basis | Level 3 | Interest rate contracts
Assets:
Derivative Instruments	0	0
Liabilities:
Derivative Instruments	0	0
Fair Value Measured on a Recurring Basis | Level 3 | Foreign currency contracts
Assets:
Derivative Instruments	3	11
Liabilities:
Derivative Instruments	7	1
Fair Value Measured on a Recurring Basis | Level 3 | Other derivatives
Assets:
Derivative Instruments	0	0
Liabilities:
Derivative Instruments	$ 0	$ 0