REVENUE - Revenue by End Markets (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Net revenue	$ 1,674	$ 1,548
Pharmaceutical and Biopharmaceutical
Net revenue	602	521
Chemical and Energy
Net revenue	373	328
Diagnostics and Clinical
Net revenue	243	216
Food
Net revenue	158	162
Academia and Government
Net revenue	141	142
Environmental and Forensics
Net revenue	$ 157	$ 179