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Revenue Recognition - Disaggregated Revenue from External Customers by Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 26, 2021	Dec. 27, 2020	Dec. 26, 2021	Dec. 27, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 173.1	$ 127.0	$ 329.7	$ 242.5
Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue	173.1	127.0	329.7	242.5
Europe | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue	$ 61.7	$ 53.3	$ 119.8	$ 89.1
% of Revenue	35.60%	42.00%	36.30%	36.70%
United States | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue	$ 32.7	$ 25.0	$ 58.7	$ 53.9
% of Revenue	18.90%	19.70%	17.80%	22.20%
China | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue	$ 49.7	$ 24.2	$ 92.6	$ 46.6
% of Revenue	28.70%	19.10%	28.10%	19.20%
Japan | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue	$ 7.0	$ 10.1	$ 17.3	$ 21.4
% of Revenue	4.00%	8.00%	5.20%	8.80%
South Korea | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue	$ 3.6	$ 6.2	$ 11.1	$ 13.6
% of Revenue	2.10%	4.90%	3.40%	5.60%
Other | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
Revenue	$ 18.4	$ 8.2	$ 30.2	$ 17.9
% of Revenue	10.70%	6.30%	9.20%	7.50%

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