| Cover | Dec. 08, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 8, 2020 |
| Entity File Number | 1-10879 |
| Entity Registrant Name | AMPHENOL CORPORATION |
| Entity Central Index Key | 0000820313 |
| Entity Tax Identification Number | 22-2785165 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 358 Hall Avenue |
| Entity Address, City or Town | Wallingford |
| Entity Address, State or Province | CT |
| Entity Address, Postal Zip Code | 06492 |
| City Area Code | 203 |
| Local Phone Number | 265-8900 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, $0.001 par value |
| Trading Symbol | APH |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
