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Revenue Recognition - Schedule of Revenue from External Customers by Products and Services (Details) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 29, 2024 USD ($) productLine	Dec. 31, 2023 USD ($)	Dec. 29, 2024 USD ($) productLine	Dec. 31, 2023 USD ($)
Revenue from Contract with Customer [Abstract]
Number of product lines | productLine	2		2
Revenue from External Customer [Line Items]
Revenue	$ 180.5	$ 208.4	$ 375.2	$ 405.8
Power Products
Revenue from External Customer [Line Items]
Revenue	90.8	107.7	187.9	208.9
Materials Products
Revenue from External Customer [Line Items]
Revenue	$ 89.7	$ 100.7	$ 187.3	$ 196.9

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Revenue From Contract With Customer, Number Of Product Lines

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