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STOCKHOLDER"S EQUITY - Dividends (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
May 22, 2019 | Apr. 30, 2019 | Apr. 30, 2018 | Apr. 30, 2019 | Apr. 30, 2018
Dividends Paid |  |  |  |  |
Aggregate amount of cash dividends paid |  | $ 52 | $ 48 | $ 104 | $ 96
Common Stock, Dividends, Per Share, Declared |  | $ 0.164 | $ 0.149 | $ 0.328 | $ 0.298
Dividends, Common Stock, Cash |  | $ 52 | $ 48 | $ 104 | $ 96
Subsequent Event [Member] |  |  |  |  |
Dividends Paid |  |  |  |  |
Dividends Payable, Date Declared | May 22, 2019 |  |  |  |
Common Stock, Dividends, Per Share, Declared | $ 0.164 |  |  |  |
Dividends, Common Stock, Cash | $ 53 |  |  |  |
Dividends Payable, Date to be Paid | Jul. 24, 2019 |  |  |  |
Dividends Payable, Date of Record | Jul. 02, 2019 |  |  |  |

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