Summary of Significant Accounting Policies - Concentrations of Risk (Details) - USD ($) $ in Billions	12 Months Ended
Oct. 31, 2020	Oct. 31, 2019
Concentration Risk
Supplier receivables	$ 1.2	$ 1.2
Major Customers \| Accounts Receivable \| Ten largest distributor
Concentration Risk
Concentration of credit risk (as a percent)	47.00%	32.00%
Major Customers \| Accounts Receivable \| Three largest outsourced manufacturer
Concentration Risk
Concentration of credit risk (as a percent)	89.00%	77.00%

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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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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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