CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jul. 02, 2023	Jun. 30, 2024	Jul. 02, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss) including noncontrolling interest	$ 180.3	$ 185.5	$ 359.4	$ 364.3
Other comprehensive income (loss):
Foreign exchange translation adjustment	(5.8)	12.3	(94.6)	8.0
Hedge activity, net of tax	(2.3)	1.6	(6.5)	4.1
Pension and postretirement benefit adjustments, net of tax	2.1	0.9	4.2	2.4
Other comprehensive income (loss)	(6.0)	14.8	(96.9)	14.5
Comprehensive income (loss) including noncontrolling interest	174.3	200.3	262.5	378.8
Less: Comprehensive income (loss) attributable to noncontrolling interest	0.1	0.2	0.7	0.3
Comprehensive income (loss) attributable to Teledyne	$ 174.2	$ 200.1	$ 261.8	$ 378.5