GOODWILL AND OTHER INTANGIBLE ASSETS Roll forward (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jan. 31, 2025	Oct. 31, 2025	Oct. 31, 2024
Goodwill - Rollforward
Beginning Balance	$ 4,477	$ 4,477	$ 3,960
Foreign currency translation impact		1	(9)
Goodwill, Measurement Period Adjustment		(5)
Goodwill arising from acquisitions			526
Ending Balance		4,473	4,477
Life Sciences and Diagnostics Markets
Goodwill - Rollforward
Beginning Balance	3,000	3,000	2,489
Foreign currency translation impact		1	(15)
Goodwill, Measurement Period Adjustment		(5)
Goodwill arising from acquisitions			526
Ending Balance		2,996	3,000
Goodwill, Transfers	365
Agilent CrossLab
Goodwill - Rollforward
Beginning Balance	1,168	1,168	1,166
Foreign currency translation impact		0	2
Goodwill arising from acquisitions		0	0
Ending Balance		1,168	1,168
Goodwill, Transfers	909
Applied Markets
Goodwill - Rollforward
Beginning Balance	309	309	305
Foreign currency translation impact		0	4
Goodwill arising from acquisitions		0	0
Ending Balance		$ 309	$ 309
Goodwill, Transfers	$ (1,274)