Operating Segments and Geographic Information - Net Revenue by Geographic Region (Details) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 29, 2019 USD ($) region	Mar. 30, 2019 USD ($)	Dec. 29, 2018 USD ($)	Sep. 29, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 30, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 29, 2019 USD ($) region	Jun. 30, 2018 USD ($)	Jul. 01, 2017 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of geographic regions in which entity operates \| region	3								3
Net revenue	$ 289.7	$ 265.2	$ 306.9	$ 268.5	$ 260.7	$ 218.7	$ 205.4	$ 190.9	$ 1,130.3	$ 875.7	$ 805.0
Total Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									426.3	416.5	372.7
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									342.1	335.5	300.0
Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									84.2	81.0	72.7
Total Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									372.2	213.8	174.9
Greater China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									216.6	128.6	100.9
Other Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									155.6	85.2	74.0
Total EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									331.8	245.4	257.4
Switzerland
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									97.0	75.3	124.1
Other EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									234.8	170.1	133.3
Product
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									1,004.2	772.5	706.0
Product \| Total Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									356.5	346.8	304.9
Product \| United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									287.1	282.6	245.7
Product \| Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									69.4	64.2	59.2
Product \| Total Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									351.7	204.9	164.0
Product \| Greater China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									209.4	126.6	99.0
Product \| Other Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									142.3	78.3	65.0
Product \| Total EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									296.0	220.8	237.1
Product \| Switzerland
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									97.0	75.2	124.0
Product \| Other EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									199.0	145.6	113.1
Service
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									126.1	103.2	99.0
Service \| Total Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									69.8	69.7	67.8
Service \| United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									55.0	52.9	54.3
Service \| Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									14.8	16.8	13.5
Service \| Total Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									20.5	8.9	10.9
Service \| Greater China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									7.2	2.0	1.9
Service \| Other Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									13.3	6.9	9.0
Service \| Total EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									35.8	24.6	20.3
Service \| Switzerland
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									0.0	0.1	0.1
Service \| Other EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									$ 35.8	$ 24.5	$ 20.2