Operating Segments and Geographic Information - Revenue by Geographic Area (Details) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 28, 2020 USD ($) region	Mar. 30, 2019 USD ($)	Mar. 28, 2020 USD ($) region	Mar. 30, 2019 USD ($)
Information on reportable segments
Number of geographic regions | region	3		3
Total net revenue	$ 256.2	$ 265.2	$ 869.7	$ 840.6
Product revenue
Information on reportable segments
Total net revenue	223.8	232.1	770.5	746.0
Service revenue
Information on reportable segments
Total net revenue	32.4	33.1	99.2	94.6
United States
Information on reportable segments
Total net revenue	71.8	77.1	253.0	254.0
United States | Product revenue
Information on reportable segments
Total net revenue	58.5	63.4	213.0	213.3
United States | Service revenue
Information on reportable segments
Total net revenue	13.3	13.7	40.0	40.7
Other Americas
Information on reportable segments
Total net revenue	17.0	18.1	58.3	60.4
Other Americas | Product revenue
Information on reportable segments
Total net revenue	12.0	14.4	45.8	49.6
Other Americas | Service revenue
Information on reportable segments
Total net revenue	5.0	3.7	12.5	10.8
Total Americas
Information on reportable segments
Total net revenue	88.8	95.2	311.3	314.4
Total Americas | Product revenue
Information on reportable segments
Total net revenue	70.5	77.8	258.8	262.9
Total Americas | Service revenue
Information on reportable segments
Total net revenue	18.3	17.4	52.5	51.5
Greater China
Information on reportable segments
Total net revenue	41.3	39.4	193.7	165.2
Greater China | Product revenue
Information on reportable segments
Total net revenue	39.8	36.5	188.7	160.0
Greater China | Service revenue
Information on reportable segments
Total net revenue	1.5	2.9	5.0	5.2
Other Asia-Pacific
Information on reportable segments
Total net revenue	33.0	43.9	100.8	117.4
Other Asia-Pacific | Product revenue
Information on reportable segments
Total net revenue	29.6	41.0	89.6	107.4
Other Asia-Pacific | Service revenue
Information on reportable segments
Total net revenue	3.4	2.9	11.2	10.0
Total Asia-Pacific
Information on reportable segments
Total net revenue	74.3	83.3	294.5	282.6
Total Asia-Pacific | Product revenue
Information on reportable segments
Total net revenue	69.4	77.5	278.3	267.4
Total Asia-Pacific | Service revenue
Information on reportable segments
Total net revenue	4.9	5.8	16.2	15.2
Switzerland
Information on reportable segments
Total net revenue	27.8	23.9	53.5	72.6
Switzerland | Product revenue
Information on reportable segments
Total net revenue	27.8	23.9	53.4	72.6
Switzerland | Service revenue
Information on reportable segments
Total net revenue	0.0	0.0	0.1	0.0
Other EMEA
Information on reportable segments
Total net revenue	65.3	62.8	210.4	171.0
Other EMEA | Product revenue
Information on reportable segments
Total net revenue	56.1	52.9	180.0	143.1
Other EMEA | Service revenue
Information on reportable segments
Total net revenue	9.2	9.9	30.4	27.9
Total EMEA
Information on reportable segments
Total net revenue	93.1	86.7	263.9	243.6
Total EMEA | Product revenue
Information on reportable segments
Total net revenue	83.9	76.8	233.4	215.7
Total EMEA | Service revenue
Information on reportable segments
Total net revenue	$ 9.2	$ 9.9	$ 30.5	$ 27.9