Business Segments (Revenue and Operating Profit by Segment) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Segment Reporting Information [Line Items]
Revenue	$ 394.9	$ 599.4
Operating profit (loss)	(3.1)	45.3
Interest expense, net	12.0	15.8
Other Nonoperating Income (Expense)	(0.8)	1.2
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	(14.3)	28.3
Active Group
Segment Reporting Information [Line Items]
Revenue	289.8	385.9
Operating profit (loss)	36.2	52.1
Work Group
Segment Reporting Information [Line Items]
Revenue	90.1	114.5
Operating profit (loss)	12.7	15.5
Other [Member]
Segment Reporting Information [Line Items]
Revenue	15.0	99.0
Operating profit (loss)	4.2	6.2
Corporate [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)	$ (56.2)	$ (28.5)