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STOCKHOLDER"S EQUITY - Dividends (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended
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Jul. 31, 2018 | Jul. 31, 2017 | Jul. 31, 2018 | Jul. 31, 2017
Dividends Paid |  |  |  |
Cash dividends paid per common share | $ 0.149 | $ 0.132 | $ 0.447 | $ 0.396
Aggregate amount of cash dividends paid | $ 48 | $ 42 | $ 144 | $ 127

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