Goodwill and Intangible Assets (Schedule Of Intangible Assets) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2024	Sep. 29, 2023	Sep. 27, 2024	Sep. 29, 2023	Dec. 29, 2023
Schedule of Intangible Asset by Major Class [Line Items]
Intangible assets, net	$ 433.7		$ 433.7		$ 608.4
Amortization of Intangible Assets	$ 18.0	$ 125.6	$ 66.1	$ 388.1
Loss from continuing operations	$ (1.33)	$ (128.61)	$ (6.86)	$ (205.37)
Completed Technology
Schedule of Intangible Asset by Major Class [Line Items]
Amortizable intangible assets, gross	$ 495.2		$ 495.2		624.6
Accumulated amortization	$ 61.6		$ 61.6		$ 16.2