Income Taxes - Income Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Income before income taxes:
United States	$ (31.0)	$ (88.0)	$ (32.8)
Foreign	522.5	354.5	510.2
Income before income taxes	$ 491.5	$ 266.5	$ 477.4

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details