Related Party Transactions (Tables)

9 Months Ended

Sep. 25, 2021

Related Party Transactions [Abstract]

Schedule of related party transactions

	For the Three Months Ended September 25, 2021						For the Three Months Ended September 26, 2020
(in millions)	Powersem		EB Tech		ATEC		Powersem		EB Tech		ATEC
Sales to related party	$	—	$	—	$	—	$	0.4	$	—	$	—
Purchase material/service from related party	0.8		0.1		3.1		0.8		—		2.4
	For the Nine Months Ended September 25, 2021						For the Nine Months Ended September 26, 2020
(in millions)	Powersem		EB Tech		ATEC		Powersem		EB Tech		ATEC
Sales to related party	$	0.2	$	—	$	—	$	1.1	$	—	$	—
Purchase material/service from related party	2.6		0.3		8.9		1.8		—		5.8
	September 25, 2021						December 26, 2020
(in millions)	Powersem		EB Tech		ATEC		Powersem		EB Tech		ATEC
Accounts receivable balance	$	—	$	—	$	—	$	0.1	$	—	$	—
Accounts payable balance	0.1		—		2.1		0.1		—		0.2