Stockholders' Equity - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) Income (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
Jul. 31, 2019	Oct. 31, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 3,307.8	$ 3,175.8
Gross change in value during the year ended October 31, 2018		(47.5)
Tax effect for the period		(3.1)
ASU 2016-16 adoption		(4.8)
Gross change in value during the nine months ended July 31, 2019	(51.1)
Ending balance	3,615.5	3,307.8
Foreign Currency Translation Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(412.2)	(353.7)
Gross change in value during the year ended October 31, 2018		(58.5)
Tax effect for the period		0.0
ASU 2016-16 adoption		0.0
Gross change in value during the nine months ended July 31, 2019	(51.1)
Ending balance	(463.3)	(412.2)
Minimum Pension Liability
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(18.5)	(21.6)
Gross change in value during the year ended October 31, 2018		11.0
Tax effect for the period		(3.1)
ASU 2016-16 adoption		(4.8)
Gross change in value during the nine months ended July 31, 2019	0.0
Ending balance	(18.5)	(18.5)
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(430.7)	(375.3)
Ending balance	$ (481.8)	$ (430.7)

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount before tax and reclassification adjustments of other comprehensive income (loss).

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Amount before tax, after reclassification adjustments of other comprehensive income (loss).

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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Amount of increase (decrease) in accumulated other comprehensive income (AOCI) for reclassification to retained earnings of tax effect from remeasurement of deferred tax pursuant to Tax Cuts and Jobs Act.

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