Revenue From Contracts With Customers Disaggrated Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Revenue	$ 440.2	$ 527.7	$ 1,260.3	$ 1,716.2
Active Group
Revenue	318.7	328.6	914.4	1,097.8
Work Group
Revenue	109.1	123.0	304.2	355.3
Other [Member]
Revenue	12.4	76.1	41.7	263.1
Wholesale Channel [Member]
Revenue	327.8	391.1	928.1	1,320.7
Wholesale Channel [Member] | Active Group
Revenue	217.1	225.2	616.4	800.4
Wholesale Channel [Member] | Work Group
Revenue	99.8	111.4	276.9	322.4
Wholesale Channel [Member] | Other [Member]
Revenue	10.9	54.5	34.8	197.9
Consumer-Direct Channel [Member]
Revenue	112.4	136.6	332.2	395.5
Consumer-Direct Channel [Member] | Active Group
Revenue	101.6	103.4	298.0	297.4
Consumer-Direct Channel [Member] | Work Group
Revenue	9.3	11.6	27.3	32.9
Consumer-Direct Channel [Member] | Other [Member]
Revenue	$ 1.5	$ 21.6	$ 6.9	$ 65.2