Discontinued Operations (Details) - USD ($)		3 Months Ended			9 Months Ended
	Aug. 01, 2015	Apr. 02, 2016	Oct. 03, 2015	Mar. 28, 2015	Apr. 02, 2016	Mar. 28, 2015	Jul. 31, 2015	Jun. 27, 2015
Discontinued Operations
Percentage of outstanding shares distributed	80.10%
Stock conversion ratio in distribution	0.2
Cash contributions agreed to in spin-off	$ 137,600,000
Cash contributions remaining		$ 600,000			$ 600,000
Proceeds from sale of Lumentum Holdings Inc. Series A Preferred Stock					35,800,000	$ 0
Net revenue under Supply Agreement		220,400,000		$ 212,400,000	682,200,000	654,100,000
Accumulated other comprehensive loss transferred to Lumentum	7,800,000				7,800,000
Net operating losses used to offset income and gain recognized on separation					1,000,000,000
Income (loss) from discontinued operations, net of taxes		5,000,000		22,600,000	(45,400,000)	51,300,000
Tax benefit from discontinued operations		6,100,000
Spinoff | Lumentum
Discontinued Operations
Deferred tax assets	29,500,000
Deferred tax liabilities	1,000,000
Income taxes payable	3,300,000							$ 3,700,000
Current income tax receivables	1,300,000
Other long-term liabilities related to uncertain tax positions	$ 100,000
Net income tax provision for discontinued operations				(22,200,000)	24,400,000	(21,600,000)
Transaction, advisory and other costs to effect the separation		1,100,000		$ 5,200,000	16,500,000	$ 8,900,000
Spinoff | Lumentum | Discontinued Operations
Discontinued Operations
Net income tax provision					17,100,000
Spinoff | Lumentum | Federal and State
Discontinued Operations
Net income tax provision for discontinued operations					7,600,000
Series A Preferred Stock
Discontinued Operations
Proceeds from sale of Lumentum Holdings Inc. Series A Preferred Stock			$ 35,800,000
Shares canceled in transaction (in shares)			4,195
Lumentum | Supply Commitment
Discontinued Operations
Supply Agreement with Lumentum amount							$ 15,000,000
Net revenue under Supply Agreement		$ 4,400,000			$ 12,700,000
Amada | Series A Preferred Stock
Discontinued Operations
Number of shares sold (in shares)			35,805
Lumentum
Discontinued Operations
Retained ownership percentage	19.90%
Lumentum | Viavi Solutions | Series A Preferred Stock
Discontinued Operations
Number of shares sold (in shares)	40,000
Lumentum
Discontinued Operations
Retained ownership percentage	19.90%
Shares held in investment	11,700,000