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OVERVIEW, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
May 31, 2018 | Apr. 30, 2018 | Apr. 30, 2017 | Apr. 30, 2017 | Oct. 31, 2017
Variable Interest Entity Disclosures |  |  |  |  |
Ownership percentage in Lasergen VIE |  | 48.00% |  |  |
Call option amount to acquire remaining shares of business |  | $ 105 |  |  |
Carrying value of investments in VIE's |  | 80 |  |  |
Maximum exposure of investments in VIE's |  | 80 |  |  |
Fair Value of Financial Instruments |  |  |  |  |
Fair value of senior notes in excess of carrying value |  |  |  |  | $ 58
Fair value of senior notes lower than carrying value |  | $ 4 |  |  |
Services and other revenue [Member] |  |  |  |  |
Revisions [Abstract] |  |  |  |  |
Prior period revision amount from products to service adjustment |  |  | $ 3 | $ 6 |
Services and other cost of sales [Member] |  |  |  |  |
Revisions [Abstract] |  |  |  |  |
Prior period revision amount from products to service adjustment |  |  | $ 2 | $ 4 |
Subsequent Event [Member] | Advanced Analytical Technologies, Inc (AATI) [Member] |  |  |  |  |
Acquisition |  |  |  |  |
Purchase Price | $ 250 |  |  |  |

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