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GOODWILL AND OTHER INTANGIBLE ASSETS Textuals (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Apr. 15, 2021	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Acquisition
Additions to goodwill				$ 365
Foreign currency translation impact on other intangible assets				2
Impairment of IPR&D		$ 0	$ 0	0	$ 90
Goodwill impairment		0	0	0	0
Amortization of intangible assets during the period		$ 54	$ 45	144	$ 140
Life Sciences and Applied Markets
Acquisition
Additions to goodwill				0
Diagnostics and Genomics
Acquisition
Additions to goodwill				365
Resolution Bioscience, Inc.
Acquisition
Purchase Price	$ 550
Contingent Consideration Arrangement - Maximum	$ 145
Contingent Consideration maximum earn-out period		3 years 4 months 24 days
Measurement Period adjustment, Contingent Consideration Liability				14
Additions to goodwill				365
Addition to other intangible assets				$ 343
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				11 years
Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities		$ 59		$ 59
Resolution Bioscience, Inc. | Other accrued liabilities
Acquisition
Fair Value of Contingent Consideration Liability, Current		62		62
Resolution Bioscience, Inc. | Other long-term liabilities
Acquisition
Fair Value of Contingent Consideration, Liability, Noncurrent		48		$ 48
Resolution Bioscience, Inc. | Goodwill
Acquisition
Measurement Period Adjustment		(70)
Resolution Bioscience, Inc. | Other Intangible Assets
Acquisition
Measurement Period Adjustment		$ 80

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