Cover Page - shares	3 Months Ended
	Apr. 04, 2021	Apr. 27, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Apr. 04, 2021
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, $0.01 par value
Trading Symbol	TDY
Security Exchange Name	NYSE
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 Common Stock, Shares Outstanding		37,067,616
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Entity Central Index Key	0001094285
Current Fiscal Year End Date	--01-02