Balance Sheet Information (Tables)

12 Months Ended

Dec. 25, 2020

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Summary of Inventories

Inventories consisted of the following:

	December 25,		December 27,
(In millions)	2020		2019
Raw materials	$	102.9	$	99.9
Work in process		64.5		57.6
Finished goods		13.0		14.9
Total	$	180.4	$	172.4

Property, Plant and Equipment, Net

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

	Useful Life	December 25,			December 27,
(In millions)	(in years)	2020			2019
Land	n/a	$	3.8		$	4.8
Buildings	50		37.2			36.9
Leasehold improvements	*		46.7			41.8
Machinery and equipment	5-10		73.8			58.1
Computer equipment and software	3-10		42.5			32.1
Furniture and fixtures	5		4.4			4.4
			208.4			178.1
Accumulated depreciation			(84.0	)		(56.7	)
Construction in progress			34.8			23.9
Total		$	159.2		$	145.3