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Revenue Recognition - Disaggregated Revenue from External Customers by Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 137.3	$ 113.9	$ 379.8	$ 362.3
Europe
Disaggregation of Revenue [Line Items]
Revenue	$ 49.9	$ 45.8	$ 139.0	$ 136.6
Europe | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
% of Revenue	36.30%	40.20%	36.60%	37.70%
United States
Disaggregation of Revenue [Line Items]
Revenue	$ 31.2	$ 22.2	$ 85.1	$ 78.5
United States | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
% of Revenue	22.70%	19.50%	22.40%	21.70%
China
Disaggregation of Revenue [Line Items]
Revenue	$ 26.9	$ 13.0	$ 73.5	$ 46.9
China | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
% of Revenue	19.60%	11.40%	19.40%	12.90%
Japan
Disaggregation of Revenue [Line Items]
Revenue	$ 10.5	$ 12.5	$ 31.9	$ 46.9
Japan | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
% of Revenue	7.60%	11.00%	8.40%	12.90%
South Korea
Disaggregation of Revenue [Line Items]
Revenue	$ 6.9	$ 13.7	$ 20.5	$ 35.5
South Korea | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
% of Revenue	5.00%	12.00%	5.40%	9.80%
Other
Disaggregation of Revenue [Line Items]
Revenue	$ 11.9	$ 6.7	$ 29.8	$ 17.9
Other | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
% of Revenue	8.80%	5.90%	7.80%	5.00%

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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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