Condensed Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2022	Oct. 03, 2021	Oct. 02, 2022	Oct. 03, 2021
Income Statement [Abstract]
Net sales	$ 1,363.6	$ 1,311.9	$ 4,040.4	$ 3,238.6
Costs and expenses
Cost of sales	785.8	787.7	2,327.0	1,943.3
Selling, general and administrative expenses	283.7	279.3	861.4	768.2
Acquired intangible asset amortization	48.9	55.3	153.8	97.9
Total costs and expenses	1,118.4	1,122.3	3,342.2	2,809.4
Operating income	245.2	189.6	698.2	429.2
Interest and debt expense, net	(22.0)	(23.8)	(66.8)	(67.3)
Gain (loss) on debt extinguishment	0.0	0.0	10.6	(13.4)
Non-service retirement benefit income	2.9	2.8	8.6	8.4
Other income (expense), net	5.2	(0.7)	5.2	4.4
Income before income taxes	231.3	167.9	655.8	361.3
Provision for income taxes	53.1	33.8	93.7	77.8
Net income including noncontrolling interest	178.2	134.1	562.1	283.5
Less: Net income (loss) attributable to noncontrolling interest	(0.1)	0.0	(0.1)	0.0
Net income attributable to Teledyne	$ 178.3	$ 134.1	$ 562.2	$ 283.5
Basic earnings per common share (in USD per share)	$ 3.81	$ 2.88	$ 12.01	$ 6.75
Weighted average common shares outstanding (in shares)	46.8	46.6	46.8	42.0
Diluted earnings per common share (in USD per share)	$ 3.74	$ 2.81	$ 11.79	$ 6.58
Weighted average diluted common shares outstanding (in shares)	47.7	47.7	47.7	43.1