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Stock-Based Compensation- Employee Stock Purchase Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019	Nov. 01, 2015
Share-based compensation
Common stock, authorized (shares)	9,600,000,000	9,600,000,000
Maximum contribution limit as percentage of base compensation (as a percent)	15.00%
Current offering period	24 months
Offering period	6 months
Stock-based compensation expense, net of tax	$ 312	$ 227	$ 220
Employee Stock Purchase Plan
Share-based compensation
Common stock, authorized (shares)				80,000,000
Maximum contribution limit as percentage of base compensation (as a percent)	10.00%
Stock purchase price as a percentage of the fair market value on the purchase date	95.00%
Stock-based compensation expense, net of tax	$ 0

X

- Definition

Current offering period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Period of offering price, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Amount, after tax, of expense for award under share-based payment arrangement.

+ References

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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

+ References

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