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REVENUE - Revenue by End Markets (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Net revenue	$ 1,586	$ 1,261	$ 4,659	$ 3,856
Pharmaceutical and Biopharmaceutical
Net revenue	576	440	1,628	1,263
Chemical and Energy
Net revenue	334	260	976	839
Diagnostics and Clinical
Net revenue	242	178	691	572
Food
Net revenue	143	123	449	367
Academia and Government
Net revenue	138	119	423	375
Environmental and Forensics
Net revenue	$ 153	$ 141	$ 492	$ 440

X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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