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Reportable Segments - Percentage of Revenues from Customers by Country (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 29, 2019	Dec. 30, 2018
Revenue from External Customer [Line Items]
Revenue	$ 239.9	$ 280.5	$ 482.7	$ 554.7
United States
Revenue from External Customer [Line Items]
Revenue	$ 60.7	$ 62.8	$ 116.1	$ 129.0
United States | Geographic Concentration Risk
Revenue from External Customer [Line Items]
% of Revenue	25.30%	22.40%	24.10%	23.30%
China
Revenue from External Customer [Line Items]
Revenue	$ 72.2	$ 105.6	$ 145.4	$ 206.6
China | Geographic Concentration Risk
Revenue from External Customer [Line Items]
% of Revenue	30.10%	37.60%	30.10%	37.20%
Europe
Revenue from External Customer [Line Items]
Revenue	$ 60.5	$ 64.1	$ 123.5	$ 133.9
Europe | Geographic Concentration Risk
Revenue from External Customer [Line Items]
% of Revenue	25.20%	22.90%	25.60%	24.10%
Other
Revenue from External Customer [Line Items]
Revenue	$ 46.5	$ 48.0	$ 97.7	$ 85.2
Other | Geographic Concentration Risk
Revenue from External Customer [Line Items]
% of Revenue	19.40%	17.10%	20.20%	15.40%

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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No definition available.

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- Definition

Amount, including 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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