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SHARE-BASED COMPENSATION General Disclosures (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018
Employee stock purchase plan [Abstract] |  |  |
Compensation percentage maximum eligible contribution to purchase shares of common stock | 10.00% |  |
ESPP eligible employee common stock purchase price ratio | 85.00% |  |
Maximum number of shares authorized for issuance under the ESPP (in shares) | 31,000,000 |  |
Number of shares purchased under ESPP (in shares) | 628,644 | 603,488 | 558,116
Aggregate Value stock issued under Employee Stock Purchase Plan | $ 41 | $ 37 | $ 32
Aggregate participants contributions to ESPP | $ 22 |  |
Incentive compensation plans [Abstract] |  |  |
Term of the 2018 Stock Plan (in years) | ten years |  |
Common stock available for future awards under the 2018 Stock Plan (in shares) | 25,596,430 |  |
Maximum contractual term (in years) | ten years |  |
Percentage market value of the common stock option exercise price is generally not less than (in hundredths) | 100.00% |  |
Minimum final share award percentage of the target award based on performance metrics (in hundredths) | 0.00% |  |
Maximum final share award percentage of the target award based on performance metrics (in hundredths) | 200.00% |  |
Time period after which participants of the performance stock award plan are entitled to receive unrestricted share of the company's stock, if specified performance targets are met | three years |  |
Employee Stock Purchase Plan |  |  |
Incentive compensation plans [Abstract] |  |  |
Common stock available for future awards under the 2018 Stock Plan (in shares) | 25,770,573 |  |
Share-based Payment Arrangement, Option |  |  |
Incentive compensation plans [Abstract] |  |  |
Percentage which rate options generally vest per year (in hundredths) | 25.00% |  |
Number of years from the date of grant generally vest (in years) | 4 years |  |
Restricted Stock Units (RSUs) |  |  |
Incentive compensation plans [Abstract] |  |  |
Percentage which rate options generally vest per year (in hundredths) | 25.00% |  |
Number of years from the date of grant generally vest (in years) | 4 years |  |

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- Definition Aggregate participant contributions to employee stock purchase plan for the purchase of shares of the company's common stock not yet issued to participants at the end of the period. Shares are excluded from the available for issuance balance at the end of the period. + References No definition available. + Details
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- Definition Reflects the duration as to when the share-based award expires as specified in the award agreement, which may be presented in a variety of ways (for example, in years, months, quarter of a year). + References No definition available. + Details
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- Definition An entity may opt to disclose the percent of market value on offering date that participants pay for options granted. + References No definition available. + Details
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- Definition Description of pertinent provisions of share based compensation awards that have actual or potential impact upon the company's financial statements. + References No definition available. + Details
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- Definition The minimum payout range for participants of the original target grant based upon the company's attainments of pre-established operating ratio targets. + References No definition available. + Details
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- Definition Description of the period of time over which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, which may be expressed in a variety of ways (for example, in years, month and year). + References No definition available. + Details
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + 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 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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 + Details
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- Definition Number of shares authorized for issuance under share-based payment arrangement. + 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 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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 + Details
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