CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2023	Oct. 02, 2022	Oct. 01, 2023	Oct. 02, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss) including noncontrolling interest	$ 198.8	$ 178.2	$ 563.1	$ 562.1
Other comprehensive income (loss):
Foreign exchange translation adjustment	(76.6)	(357.1)	(68.6)	(544.5)
Hedge activity, net of tax	(1.1)	(6.2)	3.0	(2.0)
Pension and postretirement benefit adjustments, net of tax	1.8	4.1	4.2	12.3
Other comprehensive income (loss)	(75.9)	(359.2)	(61.4)	(534.2)
Comprehensive income (loss) including noncontrolling interest	122.9	(181.0)	501.7	27.9
Less: Comprehensive income (loss) attributable to noncontrolling interest	0.2	(0.1)	0.5	(0.1)
Comprehensive income (loss) attributable to Teledyne	$ 122.7	$ (180.9)	$ 501.2	$ 28.0