Inventories (Tables)

12 Months Ended

Dec. 31, 2023

Inventory Disclosure [Abstract]

Schedule of Inventory

Inventories at December 31, 2023 and January 1, 2023 were as follows (in millions):

	Fiscal Year
	2023		2022
Raw materials and supplies	$	234.9	$	213.6
Work-in-process	973.6		941.1
Finished goods	114.5		111.9
	1,323.0		1,266.6
Inventory valuation reserves	(75.5)		(70.9)
Total inventories, net	$	1,247.5	$	1,195.7