| Document and Entity Information Document | Nov. 22, 2021 |
| Document and Entity Information [Abstract] | |
| Entity Central Index Key | 0001090872 |
| Title of 12(b) Security | COMMON STOCK, $0.01 PAR VALUE |
| Entity Incorporation, State or Country Code | DE |
| Document Type | 8-K |
| Document Period End Date | Nov. 22, 2021 |
| Entity Registrant Name | AGILENT TECHNOLOGIES, INC. |
| Entity Tax Identification Number | 001-15405 |
| Entity Tax Identification Number | 77-0518772 |
| Entity Address, Address Line One | 5301 Stevens Creek Boulevard |
| Entity Address, City or Town | Santa Clara |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 95051 |
| City Area Code | (800) |
| Local Phone Number | 227-9770 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Trading Symbol | A |
| Security Exchange Name | NYSE |
| Amendment Flag | false |
