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Fair Value (Details) - USD ($) $ in Millions | Oct. 31, 2018 | Oct. 31, 2017
--- | --- | ---
Assets: |  |
Fair Value | $ 3,996 | $ 5,398
Derivative Instruments | 515 | 121
Liabilities: |  |
Derivative Instruments | 195 | 372
Fair value, short- and long-term debt | 6,000 | 8,100
Carrying value, short- and long-term debt | 6,000 | 7,800
Fair value measured on a recurring basis |  |
Assets: |  |
Total Assets | 5,275 | 6,729
Liabilities: |  |
Total Liabilities | 195 | 372
Fair value measured on a recurring basis | Corporate Debt |  |
Assets: |  |
Fair Value | 1,620 | 1,390
Available-for-Sale Investments | 366 | 629
Fair value measured on a recurring basis | Financial institution instruments |  |
Assets: |  |
Fair Value | 9 | 6
Available-for-Sale Investments | 32 | 78
Fair value measured on a recurring basis | Government debt |  |
Assets: |  |
Fair Value | 2,367 | 4,002
Available-for-Sale Investments | 313 | 442
Fair value measured on a recurring basis | Mutual funds |  |
Assets: |  |
Available-for-Sale Investments | 47 | 49
Fair value measured on a recurring basis | Marketable equity securities |  |
Assets: |  |
Available-for-Sale Investments | 6 | 12
Fair value measured on a recurring basis | Interest rate contracts |  |
Assets: |  |
Derivative Instruments | 0 | 0
Liabilities: |  |
Derivative Instruments | 23 | 12
Fair value measured on a recurring basis | Foreign currency contracts |  |
Assets: |  |
Derivative Instruments | 515 | 120
Liabilities: |  |
Derivative Instruments | 164 | 360
Fair value measured on a recurring basis | Other derivatives |  |
Assets: |  |
Derivative Instruments | 0 | 1
Liabilities: |  |
Derivative Instruments | 8 | 0
Fair value measured on a recurring basis | Level 1 |  |
Assets: |  |
Total Assets | 2,270 | 3,957
Liabilities: |  |
Total Liabilities | 0 | 0
Fair value measured on a recurring basis | Level 1 | Corporate Debt |  |
Assets: |  |
Fair Value | 0 | 0
Available-for-Sale Investments | 0 | 0
Fair value measured on a recurring basis | Level 1 | Financial institution instruments |  |
Assets: |  |
Fair Value | 0 | 0
Available-for-Sale Investments | 0 | 0
Fair value measured on a recurring basis | Level 1 | Government debt |  |
Assets: |  |
Fair Value | 2,217 | 3,902
Available-for-Sale Investments | 0 | 0
Fair value measured on a recurring basis | Level 1 | Mutual funds |  |
Assets: |  |
Available-for-Sale Investments | 47 | 49
Fair value measured on a recurring basis | Level 1 | Marketable equity securities |  |
Assets: |  |
Available-for-Sale Investments | 6 | 6
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 | 2,998 | 2,762
Liabilities: |  |
Total Liabilities | 195 | 370
Fair value measured on a recurring basis | Level 2 | Corporate Debt |  |
Assets: |  |
Fair Value | 1,620 | 1,390
Available-for-Sale Investments | 366 | 629
Fair value measured on a recurring basis | Level 2 | Financial institution instruments |  |
Assets: |  |
Fair Value | 9 | 6
Available-for-Sale Investments | 32 | 78
Fair value measured on a recurring basis | Level 2 | Government debt |  |
Assets: |  |
Fair Value | 150 | 100
Available-for-Sale Investments | 313 | 442
Fair value measured on a recurring basis | Level 2 | Mutual funds |  |
Assets: |  |
Available-for-Sale Investments | 0 | 0
Fair value measured on a recurring basis | Level 2 | Marketable equity securities |  |
Assets: |  |
Available-for-Sale Investments | 0 | 6
Fair value measured on a recurring basis | Level 2 | Interest rate contracts |  |
Assets: |  |
Derivative Instruments | 0 | 0
Liabilities: |  |
Derivative Instruments | 23 | 12
Fair value measured on a recurring basis | Level 2 | Foreign currency contracts |  |
Assets: |  |
Derivative Instruments | 508 | 110
Liabilities: |  |
Derivative Instruments | 164 | 358
Fair value measured on a recurring basis | Level 2 | Other derivatives |  |
Assets: |  |
Derivative Instruments | 0 | 1
Liabilities: |  |
Derivative Instruments | 8 | 0
Fair value measured on a recurring basis | Level 3 |  |
Assets: |  |
Total Assets | 7 | 10
Liabilities: |  |
Total Liabilities | 0 | 2
Fair value measured on a recurring basis | Level 3 | Corporate Debt |  |
Assets: |  |
Fair Value | 0 | 0
Available-for-Sale Investments | 0 | 0
Fair value measured on a recurring basis | Level 3 | Financial institution instruments |  |
Assets: |  |
Fair Value | 0 | 0
Available-for-Sale Investments | 0 | 0
Fair value measured on a recurring basis | Level 3 | Government debt |  |
Assets: |  |
Fair Value | 0 | 0
Available-for-Sale Investments | 0 | 0
Fair value measured on a recurring basis | Level 3 | Mutual funds |  |
Assets: |  |
Available-for-Sale Investments | 0 | 0
Fair value measured on a recurring basis | Level 3 | Marketable equity securities |  |
Assets: |  |
Available-for-Sale 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 | 7 | 10
Liabilities: |  |
Derivative Instruments | 0 | 2
Fair value measured on a recurring basis | Level 3 | Other derivatives |  |
Assets: |  |
Derivative Instruments | 0 | 0
Liabilities: |  |
Derivative Instruments | $ 0 | $ 0

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