SEGMENT INFORMATION - Profitability (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014
Segment Reporting [Abstract]
Number of operating segments	3
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Total net revenue	$ 963	$ 988	$ 1,989	$ 1,996
Income from operations	107	94	222	218
Life Sciences and Applied Markets
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Total net revenue	473	495	1,020	1,032
Income from operations	75	71	182	176
Diagnostics and Genomics
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Total net revenue	169	168	317	325
Income from operations	25	26	26	45
Agilent CrossLab
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Total net revenue	321	325	652	639
Income from operations	69	70	137	139
Segment Total
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Total net revenue	963	988	1,989	1,996
Income from operations	$ 169	$ 167	$ 345	$ 360