Overview and Summary of Significant Accounting Policies (Details 2) - Major Customers - Accounts Receivable $ in Millions	12 Months Ended
Oct. 31, 2019 USD ($) receivable_balance	Oct. 31, 2018 USD ($) receivable_balance
Concentration Risk
Concentration of credit risk (as a percent)		10.00%
Three largest outsourced manufacturer
Concentration Risk
Number of largest distributor and reseller receivable balances or largest outsourced manufacturer receivable balances \| receivable_balance	3	3
Concentration of credit risk (as a percent)		92.00%
Manufacturer receivables \| $	$ 635	$ 684

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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