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SHARE-BASED COMPENSATION (Tables) | 9 Months Ended
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Jul. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract] |
Allocated share-based compensation expense disclosure | The impact on our results for share-based compensation was as follows:
| Three Months Ended |  | Nine Months Ended
| July 31, |  | July 31,
| 2021 |  | 2020 |  | 2021 |  | 2020
| (in millions)
Cost of products and services | $ | 6 |  |  | $ | 5 |  |  | $ | 21 |  |  | $ | 16 |
Research and development | 3 |  |  | 2 |  |  | 9 |  |  | 7 |
Selling, general and administrative | 14 |  |  | 12 |  |  | 60 |  |  | 41 |
Total share-based compensation expense | $ | 23 |  |  | $ | 19 |  |  | $ | 90 |  |  | $ | 64 |
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology [Text Block] | The following assumptions were used to estimate the fair value of awards granted.
| Three Months Ended |  | Nine Months Ended
| July 31, |  | July 31,
| 2021 |  | 2020 |  | 2021 |  | 2020
Stock Option Plans: |  |  |  |  |  |  |
Weighted average risk-free interest rate | 0.9% |  | — |  | 0.5% |  | — |
Dividend yield | 0.6% |  | — |  | 0.7% |  | — |
Weighted average volatility | 26% |  | — |  | 26% |  | — |
Expected life | 5.5 years |  | — |  | 5.5 years |  | — |
LTPP: |  |  |  |  |  |  |
Volatility of Agilent shares | 30% |  | 23% |  | 30% |  | 23%
Volatility of selected peer-company shares | 24%-57% |  | 15%-44% |  | 24%-57% |  | 15%-44%
Pair-wise correlation with selected peers | 45% |  | 29% |  | 45% |  | 29%
Post-vest holding restriction discount for all executive awards | 6.8% |  | 5.3% |  | 6.8% |  | 5.3%

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, and long-term performance plan grants. + References No definition available. + Details
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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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