Related Party Disclosures (Tables)

12 Months Ended

Jan. 01, 2022

Related Party Transactions [Abstract]

Schedule of related party transactions

	Fiscal Year Ended
	January 1, 2022						December 26, 2020
(in millions)	Powersem		EB Tech		ATEC		Powersem		EB Tech		ATEC
Sales to related party	$	0.2	$	—	$	—	$	1.5	$	—	$	—
Purchase of material/services from related party	3.0		0.4		12.6		2.7		—		8.7
Accounts receivable balance	—		—		—		0.1		—		—
Accounts payable balance	$	—	$	—	$	1.8	$	0.1	$	—	$	0.2