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STOCKHOLDERS' EQUITY Stock Repurchases (Details) - USD ($) shares in Millions, $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018 | Nov. 19, 2018 | May 28, 2015
Share Repurchase Program [Line Items] |  |  |  |  |
Stock Repurchased and Retired During Period, Value | $ 469 | $ 723 | $ 422 |  |
2015 Repurchase Program [Member] |  |  |  |  |
Share Repurchase Program [Line Items] |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  |  | $ 1,140
Stock Repurchased and Retired During Period, Shares |  |  | 6.4 |  |
Stock Repurchased and Retired During Period, Value |  |  | $ 422 |  |
Remaining authorized repurchase amount |  | $ 188 |  |  |
2019 Repurchase Program [Member] |  |  |  |  |
Share Repurchase Program [Line Items] |  |  |  |  |
Stock Repurchase Program, Authorized Amount |  |  |  | $ 1,750 |
Stock Repurchased and Retired During Period, Shares | 5.2 | 10.4 |  |  |
Stock Repurchased and Retired During Period, Value | $ 469 | $ 723 |  |  |
Remaining authorized repurchase amount | 558 |  |  |  |
Retained Earnings |  |  |  |  |
Share Repurchase Program [Line Items] |  |  |  |  |
Stock Repurchased and Retired During Period, Value | 398 | 580 | 335 |  |
Additional Paid-in Capital |  |  |  |  |
Share Repurchase Program [Line Items] |  |  |  |  |
Stock Repurchased and Retired During Period, Value | $ 71 | $ 143 | $ 87 |  |

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- Definition Number of shares that have been repurchased and retired during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
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