Operating Segments and Geographic Information - Net Revenue by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 27, 2025	Sep. 28, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	$ 299.1	$ 238.2
Total Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	128.8	88.7
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	106.7	73.0
Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	22.1	15.7
Total Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	92.1	85.9
Greater China
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	56.5	53.8
Other Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	35.6	32.1
EMEA:
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	78.2	63.6
Product revenue
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	257.4	197.5
Product revenue \| Total Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	110.0	70.1
Product revenue \| United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	91.9	58.4
Product revenue \| Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	18.1	11.7
Product revenue \| Total Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	85.8	78.8
Product revenue \| Greater China
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	55.6	52.6
Product revenue \| Other Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	30.2	26.2
Product revenue \| EMEA:
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	61.6	48.6
Service revenue
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	41.7	40.7
Service revenue \| Total Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	18.8	18.6
Service revenue \| United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	14.8	14.6
Service revenue \| Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	4.0	4.0
Service revenue \| Total Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	6.3	7.1
Service revenue \| Greater China
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	0.9	1.2
Service revenue \| Other Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	5.4	5.9
Service revenue \| EMEA:
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net revenue	$ 16.6	$ 15.0

VIAVI SOLUTIONS INC. 10-Q