| Document and Entity Information Document | Feb. 16, 2021 | Nov. 23, 2020 |
| 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 | Feb. 16, 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 |
