CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Sep. 26, 2015	Sep. 27, 2014
Income Statement [Abstract]
Net revenue		$ 212.6	$ 219.0
Cost of sales		144.0	146.8
Amortization of acquired technologies		1.7	1.9
Gross profit		66.9	70.3
Operating expenses:
Research and development		34.4	35.0
Selling, general and administrative		34.0	28.3
Restructuring and related charges		1.0	1.8
Total operating expenses		69.4	65.1
(Loss) income from operations		(2.5)	5.2
Unrealized gain on derivative liability		2.2
Interest and other income (expense), net		(0.2)	(0.3)
(Loss) income before income taxes		(0.5)	4.9
(Benefit) provision for income taxes		(0.3)	0.6
Net (loss) income		(0.2)	4.3
Dividends on Series A Preferred Stock		0.1
Accretion of Series A Preferred Stock		9.7
Net (loss) income attributable to common shareholders		$ (10.0)	$ 4.3
Net (loss) income per share available to common shareholders
Basic and Diluted	[1]	$ (0.17)	$ 0.07
Shares used in per share calculation available to common shareholders
Basic and Diluted	[1]	58.8	58.8

[1] On August 1, 2015, JDS Uniphase Corporation (“JDSU”) distributed 47.1 million shares, or 80.1% of the outstanding shares of common stock of Lumentum Holdings Inc. (“we”, “our”, “Company” or “Lumentum”) to existing holders of JDSU common stock. JDSU was renamed Viavi Solutions Inc. (“Viavi”) and at the time of the distribution, retained 11.7 million shares, or 19.9% of Lumentum’s outstanding shares. Basic and diluted net (loss) income per share for the three months ended September 27, 2014 is calculated using the shares of Lumentum common stock outstanding on August 1, 2015, as if such shares were outstanding for the entire period.