Other, Net (Details) - USD ($) $ in Millions			3 Months Ended		9 Months Ended
	Sep. 24, 2021	Jun. 18, 2020	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Deconsolidation, Gain (Loss), Amount		$ 24.9
Interest Income, Other			$ 3.6	$ 2.4	$ 11.1	$ 5.2
Foreign Currency Transaction Gain (Loss), before Tax			5.8	5.5	12.4	13.1
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)			(4.7)	(13.9)	(15.0)	(11.6)
Other, net			(3.1)	(1.7)	(60.5)	(1.5)
Other income/(expense), net			(10.0)	(18.7)	(76.8)	(21.0)
Charge to increase Funding Liability	$ 21.2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement				15.0		15.0
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount			$ 0.0	$ 0.0	$ (52.2)	$ 0.0
Continuing Operations [Member]
Deconsolidation, Gain (Loss), Amount		$ 0.9
Charge to increase Funding Liability	$ 7.2