Operating Segments and Geographic Information - Net Revenue by Geographic Region (Details) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 27, 2020 USD ($) region	Mar. 28, 2020 USD ($)	Dec. 28, 2019 USD ($)	Sep. 28, 2019 USD ($)	Jun. 29, 2019 USD ($)	Mar. 30, 2019 USD ($)	Dec. 29, 2018 USD ($)	Sep. 29, 2018 USD ($)	Jun. 27, 2020 USD ($) region	Jun. 29, 2019 USD ($)	Jun. 30, 2018 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of geographic regions in which entity operates | region	3								3
Net revenue	$ 266.6	$ 256.2	$ 313.7	$ 299.8	$ 289.7	$ 265.2	$ 306.9	$ 268.5	$ 1,136.3	$ 1,130.3	$ 875.7
Total Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									414.8	426.3	416.5
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									341.6	342.1	335.5
Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									73.2	84.2	81.0
Total Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									368.2	372.2	213.8
Greater China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									245.7	216.6	128.6
Other Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									122.5	155.6	85.2
Total EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									353.3	331.8	245.4
Switzerland
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									64.6	97.0	75.3
Other EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									288.7	234.8	170.1
Product
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									1,005.2	1,004.2	772.5
Product | Total Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									346.1	356.5	346.8
Product | United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									288.3	287.1	282.6
Product | Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									57.8	69.4	64.2
Product | Total Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									346.2	351.7	204.9
Product | Greater China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									238.2	209.4	126.6
Product | Other Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									108.0	142.3	78.3
Product | Total EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									312.9	296.0	220.8
Product | Switzerland
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									64.5	97.0	75.2
Product | Other EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									248.4	199.0	145.6
Service
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									131.1	126.1	103.2
Service | Total Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									68.7	69.8	69.7
Service | United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									53.3	55.0	52.9
Service | Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									15.4	14.8	16.8
Service | Total Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									22.0	20.5	8.9
Service | Greater China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									7.5	7.2	2.0
Service | Other Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									14.5	13.3	6.9
Service | Total EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									40.4	35.8	24.6
Service | Switzerland
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									0.1	0.0	0.1
Service | Other EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									$ 40.3	$ 35.8	$ 24.5