| Document and Entity Information | Jan. 04, 2021 |
| Cover [Abstract] | |
| Entity Registrant Name | TELEDYNE TECHNOLOGIES INC |
| Amendment Flag | false |
| Entity Central Index Key | 0001094285 |
| Document Type | 8-K |
| Document Period End Date | Jan. 4, 2021 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 1-15295 |
| Entity Tax Identification Number | 25-1843385 |
| Entity Address, Address Line One | 1049 Camino Dos Rios |
| Entity Address, City or Town | Thousand Oaks |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 91360-2362 |
| City Area Code | (805) |
| Local Phone Number | 373-4545 |
| Written Communications | true |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $.01 per share |
| Trading Symbol | TDY |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
