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STOCKHOLDERS' EQUITY - Stock Repurchase Program (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
May 01, 2019 | Apr. 30, 2019 | Apr. 30, 2018 | Apr. 30, 2019 | Apr. 30, 2018 | Nov. 19, 2018 | Nov. 01, 2018 | May 28, 2015
Share repurchase program |  |  |  |  |  |  |  |
Stock repurchased during the period - value |  | $ 50 | $ 46 | $ 125 | $ 93 |  |  |
Aggregate cost of shares repurchased |  |  |  | 125 | 93 |  |  |
Treasury Stock Retired |  |  |  |  |  |  |  |
Treasury Stock, Retired, Cost Method, Amount |  | $ 0 | $ 0 | $ 0 | $ 0 |  |  |
2019 Repurchase Program [Member] |  |  |  |  |  |  |  |
Share repurchase program |  |  |  |  |  |  |  |
Share repurchase program authorized amount |  |  |  |  |  | $ 1,750 |  |
Stock repurchased (in shares) |  | 638,000 |  | 1,766,000 |  |  |  |
Stock repurchased during the period - value |  | $ 50 |  | $ 125 |  |  |  |
Remaining authorized repurchase amount under share repurchase program |  | $ 1,625 |  | $ 1,625 |  |  |  |
Treasury Stock Retired |  |  |  |  |  |  |  |
Number of treasury shares retired (in shares) |  | 629,000 |  | 1,757,000 |  |  |  |
Treasury Stock, Retired, Cost Method, Amount |  | $ 49 |  | $ 124 |  |  |  |
2015 Repurchase Program |  |  |  |  |  |  |  |
Share repurchase program |  |  |  |  |  |  |  |
Share repurchase program authorized amount |  |  |  |  |  |  |  | $ 1,140
Stock repurchased (in shares) |  |  | 674,000 |  | 1,300,000 |  |  |
Stock repurchased during the period - value |  |  | $ 46 |  | $ 93 |  |  |
Remaining authorized repurchase amount under share repurchase program |  |  |  |  |  |  | $ 188 |
Treasury Stock Retired |  |  |  |  |  |  |  |
Number of treasury shares retired (in shares) |  |  | 711,000 |  | 1,300,000 |  |  |
Treasury Stock, Retired, Cost Method, Amount |  |  | $ 49 |  | $ 93 |  |  |
Subsequent Event [Member] | 2019 Repurchase Program [Member] |  |  |  |  |  |  |  |
Treasury Stock Retired |  |  |  |  |  |  |  |
Number of treasury shares retired (in shares) | 9,000 |  |  |  |  |  |  |

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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: 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 Reference 2: 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=6877327&loc=d3e13212-122682 Reference 3: 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=27012166&loc=d3e187085-122770 Reference 4: 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=6877327&loc=d3e13212-122682 + Details
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