Lease Commitments	6 Months Ended
	Jun. 28, 2020
Leases [Abstract]
Lease Commitments	Lease CommitmentsAt June 28, 2020, Teledyne has right-of-use assets of $120.4 million and a total lease liability for operating leases of $131.1 million of which $111.7 million is included in long-term lease liabilities and $19.4 million is included in current accrued liabilities. Operating lease expense was $6.0 million and $12.1 million for the second quarter and first six months of 2020, respectively. Operating lease expense was $5.8 million and $11.6 million for the second quarter and first six months of 2019, respectively.