SHARE-BASED COMPENSATION-Fair Value Assumptions (Details) - USD ($)
$ in Millions |
12 Months Ended |
Oct. 31, 2017 |
Oct. 31, 2016 |
Oct. 31, 2015 |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Share-based compensation expense |
$ 61
|
$ 60
|
$ 55
|
| Employee Stock Option [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Weighted average risk-free interest rate (in hundredths) |
0.00%
|
0.00%
|
1.75%
|
| Dividend yield (in hundredths) |
0.00%
|
0.00%
|
1.00%
|
| Weighted average volatility (in hundredths) |
0.00%
|
0.00%
|
28.00%
|
| Expected life (in years) |
0 years
|
0 years
|
5 years 6 months
|
| LTPP [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Volatility of Agilent shares (in hundreths) |
23.00%
|
24.00%
|
25.00%
|
| Volatility of selected peer-company shares, Minimum (in hundreths) |
15.00%
|
14.00%
|
12.00%
|
| Volatility of selected peer-company shares, Maximum (in hundreths) |
63.00%
|
50.00%
|
57.00%
|
| Price-wise correlation with selected peers (in hundredths) |
36.00%
|
35.00%
|
37.00%
|
| LTPP & RSU [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Discount for Postvesting Restrictions |
5.30%
|
5.50%
|
|