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Cover Page - USD ($)
$ in Billions
 12 Months Ended
Dec. 29, 2019
Feb. 19, 2020
Jun. 28, 2019
Cover page.      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 29, 2019    
Document Transition Report false    
Entity File Number 1-15295    
Entity Registrant Name TELEDYNE TECHNOLOGIES INC    
Entity Incorporation, State or Country Code DE    
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    
Title of 12(b) Security Common Stock, par value $.01 per share    
Trading Symbol TDY    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 9.7
Entity Common Stock, Shares Outstanding   36,630,917  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the registrant's proxy statement to be filed subsequently with the Securities and Exchange Commission pursuant to Regulation 14A for the 2020 Annual Meeting of Shareholders are incorporated by reference in Part III of this Report on Form 10-K. Except as expressly incorporated by reference, the registrant’s proxy statement shall not be deemed to be part of this report.
    
Entity Central Index Key 0001094285    
Amendment Flag false    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-29