Summary of Significant Accounting Policies - Recently Adopted Accounting Standards (Details) - USD ($)		12 Months Ended
		Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017	Nov. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other Nonoperating Income (Expense)	[1]	$ 1,272,000	$ (913,000)	$ (3,501,000)
Scenario, Forecast [Member] | Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Liability					$ 2,000,000
Scenario, Forecast [Member] | Minimum [Member] | Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Right-of-Use Asset					65,000,000
Operating Lease, Liability					65,000,000
Scenario, Forecast [Member] | Maximum [Member] | Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Right-of-Use Asset					70,000,000
Operating Lease, Liability					$ 70,000,000

[1] Fiscal year 2017 reflects the reclassification of non-service cost components of net benefit costs to outside of operating income as a result of ASU 2017-07 adoption, effective November 1, 2017.