Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Summary of Inventories

Inventories consisted of the following:

	December 31,		December 25,
(In millions)	2021		2020
Raw materials	$	220.9	$	102.9
Work in process		102.5		64.5
Finished goods		55.8		13.0
Total	$	379.2	$	180.4

Property, Plant and Equipment, Net

Property, plant and equipment, net, consisted of the following:

	Useful Life	December 31,			December 25,
(In millions)	(in years)	2021			2020
Land	n/a	$	4.7		$	3.8
Buildings	50		52.1			37.2
Leasehold improvements	*		67.3			46.7
Machinery and equipment	5-10		132.6			73.8
Computer equipment and software	3-10		57.7			42.5
Furniture and fixtures	5		5.2			4.4
			319.6			208.4
Accumulated depreciation			(116.0	)		(84.0	)
Construction in progress			38.7			34.8
Total		$	242.3		$	159.2