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Goodwill and Intangible Assets - Schedule of Allocation and Changes in the Carrying Amount of Goodwill (Details) - USD ($) | 12 Months Ended
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Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2016
Goodwill |  |  |
Balance at beginning of period | $ 5,622,000,000 | $ 5,622,000,000 |
Acquisitions | 346,000,000 | 0 |
Balance at end of period | 5,968,000,000 | 5,622,000,000 | $ 5,622,000,000
Accumulated impairment losses | 800,000,000 |  |
Impairment loss | 0 | 0 | 0
Personal Systems |  |  |
Goodwill |  |  |
Balance at beginning of period | 2,593,000,000 | 2,593,000,000 |
Acquisitions | 7,000,000 | 0 |
Balance at end of period | 2,600,000,000 | 2,593,000,000 | 2,593,000,000
Printing |  |  |
Goodwill |  |  |
Balance at beginning of period | 3,029,000,000 | 3,029,000,000 |
Acquisitions | 339,000,000 | 0 |
Balance at end of period | $ 3,368,000,000 | 3,029,000,000 | 3,029,000,000
Corporate Investments |  |  |
Goodwill |  |  |
Accumulated impairment losses |  | $ 800,000,000 | $ 800,000,000

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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