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Basis of Presentation (Policies)	6 Months Ended
Basis of Presentation (Policies)	Dec. 27, 2014
Basis of Presentation
Fiscal Years	Fiscal Years The Company utilizes a 52-53 week fiscal year ending on the Saturday closest to June 30th. The Company’s fiscal 2015 is a 52-week year ending on June 27, 2015. The Company’s fiscal 2014 was a 52-week year ending on June 28, 2014.
Change in Reportable Segments	Change in Reportable Segments During the first quarter of fiscal 2015 the Company reorganized its Network Service and Enablement (“NSE”) reportable segment into two separate reportable segments: Network Enablement (“NE”) and Service Enablement (“SE”). This change does not impact previously reported consolidated financial information. However, historical information related to the NSE reportable segment has been recast to reflect the new NE and SE reportable segment structure. Refer to “Note 16. Operating Segments” for more information.
JDSU Separation	JDSU Separation On September 10, 2014, the Company announced plans to separate into two publicly traded companies to be named at a later date: an optical components and commercial lasers company consisting of JDSU’s current Communications and Commercial Optical Products (“CCOP”) segment, and a network and service enablement company consisting of JDSU’s current Network Enablement (“NE”), Service Enablement (“SE”) and Optical Security and Performance Products (“OSP”) segments. The separation is expected to occur through a tax-free pro rata spinoff of CCOP to JDSU shareholders, though the structure is subject to change based upon various tax and regulatory factors. The Company expects to complete the separation by the third calendar quarter of 2015.
Principles of Consolidation	Principles of Consolidation The consolidated financial statements have been prepared in accordance with U.S. GAAP and include the Company and its wholly-owned subsidiaries. All inter-company accounts and transactions have been eliminated.
Use of Estimates	Use of Estimates The preparation of the Company’s consolidated financial statements in conformity with U.S. GAAP requires Management to make estimates and assumptions that affect the reported amount of assets and liabilities at the date of the financial statements, the reported amount of net revenue and expenses and the disclosure of commitments and contingencies during the reporting periods. The Company bases estimates on historical experience and on various assumptions about the future believed to be reasonable based on available information. The Company’s reported financial position or results of operations may be materially different under changed conditions or when using different estimates and assumptions, particularly with respect to significant accounting policies. If estimates or assumptions differ from actual results, subsequent periods are adjusted to reflect more current information.

Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.

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Disclosure of accounting policy for determining an entity's fiscal year or other fiscal period. This disclosure may include identification of the fiscal period end-date, the length of the fiscal period, any reporting period lag between the entity and its subsidiaries, or equity investees. If a reporting lag exists, the closing date of the entity having a different period end is generally noted, along with an explanation of the necessity for using different closing dates. Any intervening events that materially affect the entity's financial position or results of operations are generally also disclosed.

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