Intangibles - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Oct. 03, 2026	Sep. 27, 2025
Acquired Developed Technology and Other Intangible Assets [Abstract]
Amortization of acquired technologies and other intangibles	$ 20.1	$ 8.4

Aggregate amount of intangible amortization of assets recognized as expense during the period.

No definition available.

Name:	viav_FiniteLivedIntangibleAssetsAmortizedExpense
Namespace Prefix:	viav_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration