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REVENUE- Revenue by Region (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2025	Apr. 30, 2024
Net revenue	$ 1,668	$ 1,573	$ 3,349	$ 3,231
Life Sciences and Diagnostics Markets
Net revenue	654	604	1,301	1,224
Agilent CrossLab
Net revenue	713	664	1,409	1,350
Applied Markets
Net revenue	301	305	639	657
Americas
Net revenue	678	637	1,347	1,267
Americas | Life Sciences and Diagnostics Markets
Net revenue	325	290	637	573
Americas | Agilent CrossLab
Net revenue	270	259	531	512
Americas | Applied Markets
Net revenue	83	88	179	182
Europe
Net revenue	442	426	905	884
Europe | Life Sciences and Diagnostics Markets
Net revenue	177	176	367	360
Europe | Agilent CrossLab
Net revenue	194	182	382	367
Europe | Applied Markets
Net revenue	71	68	156	157
Asia Pacific
Net revenue	548	510	1,097	1,080
Asia Pacific | Life Sciences and Diagnostics Markets
Net revenue	152	138	297	291
Asia Pacific | Agilent CrossLab
Net revenue	249	223	496	471
Asia Pacific | Applied Markets
Net revenue	$ 147	$ 149	$ 304	$ 318

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