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ACQUISITIONS - Proforma Operating Results (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended
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Jul. 31, 2019 | Jul. 31, 2020
Business Acquisition [Line Items] |  |
Pro Forma Revenue | $ 1,319 | $ 3,930
Pro Forma Net Income | $ 174 | $ 816
Pro Forma Earnings Per Share, Basic | $ 0.56 | $ 2.58
Pro Forma Earnings Per Share, Diluted | $ 0.55 | $ 2.55

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