v3.8.0.1

Financial Instruments - Cash Equivalents and Available-for-Sale Investments (Details) - USD ($) $ in Millions | Apr. 30, 2018 | Oct. 31, 2017
--- | --- | ---
Cash and Cash Equivalents [Line Items] |  |
Debt securities, Amortized Cost | $ 152 |
Debt securities, Fair Value | 173 |
Total cash and equivalents and available-for-sale investments, Cost basis | 5,196 | $ 6,971
Gross Unrealized Gain | 23 | 40
Gross Unrealized Loss | (2) | (11)
Total cash equivalents and available-for-sale investments | 5,217 | 7,000
Cost |  |
Cash and Cash Equivalents [Line Items] |  |
Total cash equivalents | 5,044 | 6,751
Cost | Time deposits |  |
Cash and Cash Equivalents [Line Items] |  |
Total cash equivalents | 1,653 | 1,159
Cost | Money market funds |  |
Cash and Cash Equivalents [Line Items] |  |
Total cash equivalents | 3,391 | 5,592
Fair Value |  |
Cash and Cash Equivalents [Line Items] |  |
Total cash equivalents | 5,044 | 6,751
Fair Value | Time deposits |  |
Cash and Cash Equivalents [Line Items] |  |
Total cash equivalents | 1,653 | 1,159
Fair Value | Money market funds |  |
Cash and Cash Equivalents [Line Items] |  |
Total cash equivalents | 3,391 | 5,592
Debt securities |  |
Cash and Cash Equivalents [Line Items] |  |
Debt securities, Amortized Cost | 152 | 220
Debt securities, Gross Unrealized Gain | 23 | 40
Debt securities, Gross Unrealized Loss | (2) | (11)
Debt securities, Fair Value | 173 | 249
Time deposits |  |
Cash and Cash Equivalents [Line Items] |  |
Debt securities, Amortized Cost | 3 | 0
Debt securities, Gross Unrealized Gain | 0 | 0
Debt securities, Gross Unrealized Loss | 0 | 0
Debt securities, Fair Value | 3 | 0
Foreign bonds |  |
Cash and Cash Equivalents [Line Items] |  |
Debt securities, Amortized Cost | 121 | 183
Debt securities, Gross Unrealized Gain | 23 | 40
Debt securities, Gross Unrealized Loss | 0 | 0
Debt securities, Fair Value | 144 | 223
Other debt securities |  |
Cash and Cash Equivalents [Line Items] |  |
Debt securities, Amortized Cost | 28 | 37
Debt securities, Gross Unrealized Gain | 0 | 0
Debt securities, Gross Unrealized Loss | (2) | (11)
Debt securities, Fair Value | $ 26 | $ 26

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- Definition Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates and investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities. + References No definition available. + Details
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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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- Definition This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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- Definition Amount of debt securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -Subparagraph (b)-(g) -URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62557-112803 + Details
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- Definition Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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