Amount of government assistance awarded that comprises amount received, receivable, and to be received unless condition for government assistance is not met. Includes, but is not limited to, government grant, assistance, incentive, award, subsidy, and loan.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 832
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483507/832-10-50-3

Commitments and Contingencies (Details) $ in Millions		3 Months Ended		9 Months Ended	12 Months Ended
Commitments and Contingencies (Details) $ in Millions	Jan. 13, 2025 lawsuit	Sep. 29, 2025 USD ($)	Jun. 28, 2020 endowedFacultyChair	Jun. 28, 2026 USD ($) patent	Jun. 28, 2026 USD ($) patent	Jun. 29, 2025 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jun. 25, 2023 USD ($)
Loss Contingencies [Line Items]
Loss contingency, number of additional lawsuits \| lawsuit	2
Number of patent infringements \| patent				5	5
Government assistance, award amount				$ 500.0	$ 500.0
Government assistance, transaction duration			13 years
Duration of annual commitment fee payment of GDA			6 years
Number of endowed faculty chairs created \| endowedFacultyChair			2
Reduction in property, plant, and equipment					500.0
Unrecorded unconditional purchase obligation, monthly payment				0.2	$ 0.2
Unrecorded unconditional purchase obligation, term					181 months
Purchase Commitment 2023
Loss Contingencies [Line Items]
Purchase commitment, amount committed									$ 200.0
Current purchases under agreement		$ 4.4		14.7		$ 20.0	$ 36.7
Product purchases year one				22.2	$ 22.2
Product purchases year two				38.0	38.0
Product purchases year three				40.0	40.0
Product purchases year four				42.0	42.0
Purchase commitment, prepaid supplies remaining				37.9	37.9
Purchase Commitment
Loss Contingencies [Line Items]
Capacity reserve deposit				60.0	60.0
Capacity reserve payment		3.5		0.0	0.0	18.1	32.9
Purchase Commitment 2024
Loss Contingencies [Line Items]
Purchase commitment, amount committed								$ 86.4
Current purchases under agreement		$ 7.2		12.0		$ 26.4	$ 19.2
Product purchases year two				21.6	21.6
Electricity for Siler City, North Carolina Facilities
Loss Contingencies [Line Items]
Purchase commitment, amount committed				55.3	$ 55.3
Purchase commitment, period					4 years
Electricity for Durham, North Carolina Facilities
Loss Contingencies [Line Items]
Purchase commitment, amount committed				$ 22.7	$ 22.7
Purchase commitment, period					7 years
Minimum
Loss Contingencies [Line Items]
Annual cost of GDA					$ 2.2
Maximum
Loss Contingencies [Line Items]
Annual cost of GDA					$ 5.2