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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. 27, 2020	Dec. 29, 2019	Dec. 27, 2020	Dec. 29, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 127.0	$ 120.7	$ 242.5	$ 248.4
United States
Disaggregation of Revenue [Line Items]
Revenue	$ 25.0	$ 28.7	$ 53.9	$ 56.3
United States | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
% of Revenue	19.70%	23.80%	22.20%	22.70%
China
Disaggregation of Revenue [Line Items]
Revenue	$ 24.2	$ 14.4	$ 46.6	$ 33.9
China | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
% of Revenue	19.10%	11.90%	19.20%	13.60%
Europe
Disaggregation of Revenue [Line Items]
Revenue	$ 53.3	$ 45.8	$ 89.1	$ 90.8
Europe | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
% of Revenue	42.00%	37.90%	36.70%	36.60%
Other
Disaggregation of Revenue [Line Items]
Revenue	$ 24.5	$ 31.8	$ 52.9	$ 67.4
Other | Geographic Concentration Risk | Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
% of Revenue	19.20%	26.40%	21.90%	27.10%

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