Operating Segments and Geographic Information - Customer Concentration Risk (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 29, 2018	Sep. 29, 2018	Jun. 27, 2020	Jun. 29, 2019	Jun. 30, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
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
Customer Concentration Risk | SICPA - OSP customer | OSP
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenue									$ 139.9	$ 161.1	$ 129.3