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Reportable Segments - Percentage of Revenues from Customers by Country (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 28, 2020	Mar. 29, 2020	Dec. 29, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 30, 2018	Sep. 23, 2018	Jun. 28, 2020	Jun. 30, 2019	Jun. 24, 2018
Revenue from External Customer [Line Items]
Revenue	$ 205.7	$ 215.5	$ 239.9	$ 242.8	$ 251.2	$ 274.1	$ 280.5	$ 274.2	$ 903.9	$ 1,080.0	$ 924.9
United States
Revenue from External Customer [Line Items]
Revenue									212.1	261.4	220.2
China
Revenue from External Customer [Line Items]
Revenue									260.4	367.2	390.5
Europe
Revenue from External Customer [Line Items]
Revenue									243.7	255.0	167.4
Other
Revenue from External Customer [Line Items]
Revenue									$ 187.7	$ 196.4	$ 146.8
Geographic Concentration Risk | United States
Revenue from External Customer [Line Items]
% of Revenue									23.00%	24.00%	24.00%
Geographic Concentration Risk | China
Revenue from External Customer [Line Items]
% of Revenue									29.00%	34.00%	42.00%
Geographic Concentration Risk | Europe
Revenue from External Customer [Line Items]
% of Revenue									27.00%	24.00%	18.00%
Geographic Concentration Risk | Other
Revenue from External Customer [Line Items]
% of Revenue									21.00%	18.00%	16.00%

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