| Cover | Feb. 09, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Feb. 9, 2021 |
| Entity Registrant Name | AMETEK, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 1-12981 |
| Entity Tax Identification Number | 14-1682544 |
| Entity Address, Address Line One | 1100 Cassatt Road |
| Entity Address, City or Town | Berwyn, |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19312 |
| City Area Code | 610 |
| Local Phone Number | 647-2121 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.01 Par Value (voting) |
| Trading Symbol | AME |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001037868 |
| Amendment Flag | false |
