Stockholders' Equity - Schedule of Share Repurchases (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Oct. 31, 2020	Oct. 31, 2019
Stockholders' Equity Note [Abstract]
Number of shares	160,850	536,972
Average repurchase price per share (in dollars per share)	$ 296.9	$ 290.7
Total costs of shares repurchased (in millions)	$ 47.8	$ 156.1

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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