Wolfspeed (WOLF) 10-Q 21 Jan 15 2015 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Dec. 28, 2014	Jan. 14, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	CREE INC
Entity Central Index Key	895419
Current Fiscal Year End Date	-22
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	28-Dec-14
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		111,630,099
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 28, 2014	Jun. 29, 2014
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$199,960	$286,824
Short-term investments	629,965	875,642
Total cash, cash equivalents and short-term investments	829,925	1,162,466
Accounts receivable, net	218,960	225,160
Inventories	332,548	284,780
Deferred income taxes	30,150	29,414
Prepaid expenses and other current assets	76,312	72,071
Total current assets	1,487,895	1,773,891
Property and equipment, net	652,852	605,713
Goodwill	616,345	616,345
Intangible assets, net	327,725	336,423
Other long-term investments	79,089	0
Other assets	11,527	11,997
Total assets	3,175,433	3,344,369
Current liabilities:
Accounts payable, trade	158,600	202,294
Accrued salaries and wages	48,028	50,527
Income taxes payable	528	14,848
Other current liabilities	37,788	38,986
Total current liabilities	244,944	306,655
Long-term liabilities:
Long-term debt	150,000	0
Deferred income taxes	14,277	12,173
Other long-term liabilities	26,668	35,395
Total long-term liabilities	190,945	47,568
Commitments and contingencies (Note 11)
Shareholders' equity:
Preferred stock, par value $0.01; 3,000 shares authorized at December 28, 2014 and June 29, 2014; none issued and outstanding	0	0
Common stock, par value $0.00125; 200,000 shares authorized at December 28, 2014 and June 29, 2014; 111,626 and 120,114 shares issued and outstanding at December 28, 2014 and June 29, 2014, respectively	138	149
Additional paid-in-capital	2,239,689	2,190,011
Accumulated other comprehensive income, net of taxes	8,192	11,405
Retained earnings	491,525	788,581
Total shareholders’ equity	2,739,544	2,990,146
Total liabilities and shareholders’ equity	$3,175,433	$3,344,369

Consolidated_Balance_Sheets_Co

Consolidated Balance Sheets Consolidation Balance Sheets (Parenthetical) (USD $)	Dec. 28, 2014	Jun. 29, 2014
In Thousands, except Per Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	3,000	3,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	200,000	200,000
Common stock, shares issued	111,626	120,114
Common stock, shares outstanding	111,626	120,114

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 28, 2014	Dec. 29, 2013
Income Statement [Abstract]
Revenue, net	$413,157	$415,086	$840,829	$806,092
Cost of revenue, net	276,378	259,308	568,230	499,557
Gross profit	136,779	155,778	272,599	306,535
Operating expenses:
Research and development	46,989	44,436	93,714	86,179
Sales, general and administrative	72,375	67,943	142,067	132,221
Amortization or impairment of acquisition-related intangibles	6,495	7,256	12,994	14,543
Loss on disposal or impairment of long-lived assets	735	760	2,182	1,417
Total operating expenses	126,594	120,395	250,957	234,360
Operating income	10,185	35,383	21,642	72,175
Non-operating income, net	1,728	3,403	4,632	6,221
Income before income taxes	11,913	38,786	26,274	78,396
Income tax (benefit) expense	-238	3,105	2,993	12,218
Net income	$12,151	$35,681	$23,281	$66,178
Earnings per share:
Basic	$0.11	$0.30	$0.20	$0.55
Diluted	$0.10	$0.29	$0.20	$0.54
Weighted average shares used in per share calculation:
Basic	115,264	120,932	117,435	120,248
Diluted	115,845	123,204	118,599	122,821

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 28, 2014	Dec. 29, 2013
Statement of Comprehensive Income [Abstract]
Net income	$12,151	$35,681	$23,281	$66,178
Currency translation (loss) gain	-735	-125	-1,902	135
Net unrealized (loss) gain on available-for-sale securities, net of tax benefit (expense) of $489, ($283), $827 and ($1,065), respectively	-800	447	-1,311	1,710
Other comprehensive (loss) income	-1,535	322	-3,213	1,845
Comprehensive income	$10,616	$36,003	$20,068	$68,023

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Income Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 28, 2014	Dec. 29, 2013
Statement of Comprehensive Income [Abstract]
Tax benefit (expense) on net unrealized (loss) gain on available-for-sale securities	$489	($283)	$827	($1,065)

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013
Cash flows from operating activities:
Net income	$23,281	$66,178
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	87,143	79,611
Stock-based compensation	33,196	30,250
Excess tax benefit from stock-based payment arrangements	-1,651	-14,853
Loss on disposal or impairment of long-lived assets	2,182	1,417
Amortization of premium/discount on investments	3,537	5,043
Gain on equity method investment	-679	0
Foreign exchange loss on equity method investment	2,156	0
Changes in operating assets and liabilities:
Accounts receivable, net	5,571	-21,029
Inventories	-47,702	-36,632
Prepaid expenses and other assets	-5,457	-6,148
Accounts payable, trade	-44,784	40,501
Accrued salaries and wages and other liabilities	-28,741	23,649
Net cash provided by operating activities	28,052	167,987
Cash flows from investing activities:
Purchases of property and equipment	-113,375	-83,450
Purchases of short-term investments	-195,892	-346,799
Proceeds from maturities of short-term investments	240,463	251,020
Proceeds from sale of property and equipment	60	94
Proceeds from sale of short-term investments	192,153	12,295
Purchases of patent and licensing rights	-9,604	-10,046
Purchase of other long-term investments	-80,566	0
Net cash provided by (used in) investing activities	33,239	-176,886
Cash flows from financing activities:
Proceeds from long-term debt borrowings	265,000	0
Payments on long-term debt borrowings	-115,000	0
Net proceeds from issuance of common stock	21,089	73,079
Excess tax benefit from stock-based payment arrangements	1,651	14,853
Repurchases of common stock	-320,349	-107
Net cash (used in) provided by financing activities	-147,609	87,825
Effects of foreign exchange changes on cash and cash equivalents	-546	393
Net (decrease) increase in cash and cash equivalents	-86,864	79,319
Cash and cash equivalents:
Beginning of period	286,824	190,069
End of period	$199,960	$269,388

Basis_of_Presentation

Basis of Presentation	6 Months Ended
	Dec. 28, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation and New Accounting Standards
	Overview
	Cree, Inc. (the Company) is a leading innovator of lighting-class light emitting diode (LED) products, lighting products and semiconductor products for power and radio-frequency (RF) applications. The Company's products are targeted for applications such as indoor and outdoor lighting, video displays, transportation, electronic signs and signals, power supplies, inverters and wireless systems.
	The Company's LED products consist of LED components, LED chips and silicon carbide (SiC) materials. The Company's success in selling LED products depends upon its ability to offer innovative products and to enable its customers to develop and market LED-based products that successfully compete against other LED-based products and drive LED adoption against traditional lighting products.
	The Company's lighting products primarily consist of LED lighting systems and bulbs. The Company designs, manufactures and sells lighting fixtures and lamps for the commercial, industrial and consumer markets.
	In addition, the Company develops, manufactures and sells power and RF devices. The Company's power products are made from SiC and provide increased efficiency, faster switching speeds and reduced system size and weight over comparable silicon-based power devices. The Company's RF devices are made from gallium nitride (GaN) and provide improved efficiency, bandwidth and frequency of operation as compared to silicon or gallium arsenide (GaAs).
	The majority of the Company's products are manufactured at its production facilities located in North Carolina, Wisconsin and China. The Company also uses contract manufacturers for certain aspects of product fabrication, assembly and packaging. The Company operates research and development facilities in North Carolina, California, Wisconsin, India and China (including Hong Kong).
	Cree, Inc. is a North Carolina corporation established in 1987 and is headquartered in Durham, North Carolina.
	The Company's three reportable segments are:
	•	LED Products
	•	Lighting Products
	•	Power and RF Products
	For financial results by reportable segment, please refer to Note 12, "Reportable Segments."
	Basis of Presentation
	The consolidated balance sheet at December 28, 2014, the consolidated statements of income for the three and six months ended December 28, 2014 and December 29, 2013, the consolidated statements of comprehensive income for the three and six months ended December 28, 2014 and December 29, 2013, and the consolidated statements of cash flows for the six months ended December 28, 2014 and December 29, 2013 (collectively, the consolidated financial statements) have been prepared by the Company and have not been audited. In the opinion of management, all normal and recurring adjustments necessary to present fairly the consolidated financial position, results of operations and cash flows at December 28, 2014, and for all periods presented, have been made. All intercompany accounts and transactions have been eliminated. The consolidated balance sheet at June 29, 2014 has been derived from the audited financial statements as of that date.
	These financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) for interim information and with the instructions to Form 10-Q and Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for annual financial statements. These financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended June 29, 2014 (fiscal 2014). The results of operations for the three and six months ended December 28, 2014 are not necessarily indicative of the operating results that may be attained for the entire fiscal year ending June 28, 2015 (fiscal 2015).
	The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, and the disclosure of contingent assets and liabilities. Actual amounts could differ materially from those estimates.
	Certain fiscal 2014 amounts in the accompanying consolidated financial statements have been reclassified to conform to the fiscal 2015 presentation. These reclassifications had no effect on previously reported consolidated net income or shareholders’ equity.
	New Accounting Standards
	Revenue from Contracts with Customers
	In May 2014, the FASB issued Accounting Standards Update (ASU) No. 2014-09: Revenue from Contracts with Customers (Topic 606). The ASU establishes a principles-based approach for accounting for revenue arising from contracts with customers and supersedes existing revenue recognition guidance. The ASU provides that an entity should apply a five-step approach for recognizing revenue, including (1) identify the contract with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when, or as, the entity satisfies a performance obligation. Also, the entity must provide various disclosures concerning the nature, amount and timing of revenue and cash flows arising from contracts with customers. The effective date will be the first quarter of the Company's fiscal year ending June 24, 2018, using one of two retrospective application methods. The Company is currently analyzing the impact of this new accounting guidance.

Financial_Statement_Details

Financial Statement Details	6 Months Ended
	Dec. 28, 2014
Financial Statement Details [Abstract]
Financial Statement Details	Financial Statement Details
	Accounts Receivable, net
	The following table summarizes the components of accounts receivable, net (in thousands):
		December 28, 2014				June 29, 2014
	Billed trade receivables		$256,350				$255,374
	Unbilled contract receivables	2,131				1,557
		258,481				256,931
	Allowance for sales returns, discounts and other incentives	(35,869		)		(29,010		)
	Allowance for bad debts	(3,652		)		(2,761		)
	Accounts receivable, net		$218,960				$225,160
	Inventories
	The following table summarizes the components of inventories (in thousands):
		December 28, 2014				June 29, 2014
	Raw material		$98,177				$95,594
	Work-in-progress	114,378				92,889
	Finished goods	119,993				96,297
	Inventories		$332,548				$284,780
	Other Current Liabilities
	The following table summarizes the components of other current liabilities (in thousands):
		December 28, 2014				June 29, 2014
	Accrued taxes		$18,148				$19,835
	Accrued professional fees	6,281				5,373
	Accrued warranty	6,945				5,842
	Accrued other	6,414				7,936
	Other current liabilities		$37,788				$38,986
	Accumulated Other Comprehensive Income, net of taxes
	The following table summarizes the components of accumulated other comprehensive income, net of taxes (in thousands):
		December 28, 2014				June 29, 2014
	Currency translation gain		$6,647				$8,549
	Net unrealized gain on available-for-sale securities	1,545				2,856
	Accumulated other comprehensive income, net of taxes		$8,192				$11,405
	Non-Operating Income, net
	The following table summarizes the components of non-operating income, net (in thousands):
		Three Months Ended							Six Months Ended
		December 28, 2014				December 29, 2013			December 28, 2014			December 29, 2013
	Foreign currency (loss) gain, net		($2,365	)			$213			($2,596	)		$477
	Gain on sale of investments, net	774				—			776			10
	Gain on equity method investment	679				—			679			—
	Interest income, net	2,586				2,806			5,618			5,147
	Other, net	54				384			155			587
	Non-operating income, net		$1,728				$3,403			$4,632			$6,221
	Reclassifications Out of Accumulated Other Comprehensive Income, net of taxes
	The following table summarizes the amounts reclassified out of accumulated other comprehensive income, net of taxes (in thousands):
	Accumulated Other Comprehensive Income Component		Amount Reclassified Out of Accumulated Other Comprehensive Income												Affected Line Item in the Consolidated Statements of Income
			Three Months Ended							Six Months Ended
			December 28, 2014				December 29, 2013			December 28, 2014			December 29, 2013
	Net unrealized gain on available-for-sale securities, net of taxes			$774				$—			$776			$10	Non-operating income, net
			774				—			776			10		Income before income taxes
			(15		)		—			88			2		Income tax (benefit) expense
				$789				$—			$688			$8	Net income

Investments

Investments	6 Months Ended
	Dec. 28, 2014
Investments, Debt and Equity Securities [Abstract]
Investments	Investments
	Investments consisted primarily of municipal bonds, corporate bonds, U.S. agency securities, non-U.S. certificates of deposit and non-U.S. government securities. All short-term investments are classified as available-for-sale. Other long-term investments consist of the Company's approximately 13% common stock ownership interest in Lextar Electronics Corporation, which was completed in December 2014. This investment is accounted for under the equity method utilizing the fair value option.
	The following tables summarize short-term investments (in thousands):
			December 28, 2014
			Amortized			Gross Unrealized				Gross				Estimated Fair
			Cost			Gains				Unrealized				Value
										Losses
	Municipal bonds			$183,806			$1,504				($154	)			$185,156
	Corporate bonds		160,346			1,537				(377		)		161,506
	U.S. agency securities		—			—				—				—
	Non-U.S. certificates of deposit		283,303			—				—				283,303
	Non-U.S. government securities		—			—				—				—
	Total short-term investments			$627,455			$3,041				($531	)			$629,965
			June 29, 2014
			Amortized			Gross				Gross				Estimated Fair
			Cost			Unrealized				Unrealized				Value
						Gains				Losses
	Municipal bonds			$291,869			$2,323				($12	)			$294,180
	Corporate bonds		200,177			2,283				(114		)		202,346
	U.S. agency securities		18,994			141				—				19,135
	Non-U.S. certificates of deposit		352,928			—				—				352,928
	Non-U.S. government securities		7,025			28				—				7,053
	Total short-term investments			$870,993			$4,775				($126	)			$875,642
	The following tables present the gross unrealized losses and estimated fair value of the Company's short-term investments, aggregated by investment type and the length of time that individual securities have been in a continuous unrealized loss position (in thousands, except numbers of securities):
			December 28, 2014
			Less than 12 Months							Greater than 12 Months								Total
			Fair Value			Unrealized Loss				Fair Value				Unrealized Loss				Fair Value		Unrealized Loss
	Municipal bonds			$35,417			($154	)			$—				$—				$35,417		($154	)
	Corporate bonds		58,229			(341		)		2,212				(36		)		60,441		(377		)
	Total			$93,646			($495	)			$2,212				($36	)			$95,858		($531	)
	Number of securities with an unrealized loss					47								1						48
			June 29, 2014
			Less than 12 Months							Greater than 12 Months								Total
			Fair Value			Unrealized Loss				Fair Value				Unrealized Loss				Fair Value		Unrealized Loss
	Municipal bonds			$7,906			($8	)			$1,520				($4	)			$9,426		($12	)
	Corporate bonds		15,696			(31		)		13,049				(83		)		28,745		(114		)
	Total			$23,602			($39	)			$14,569				($87	)			$38,171		($126	)
	Number of securities with an unrealized loss					13								7						20
	The Company utilizes specific identification in computing realized gains and losses on the sale of investments. Realized gains and losses from the sale of investments are included in Non-operating income, net in the Consolidated Statements of Income and unrealized gains and losses are included as a separate component of equity, net of tax, unless the loss is determined to be other-than-temporary.
	The Company evaluates its investments for possible impairment or a decline in fair value below cost basis that is deemed to be other-than-temporary on a periodic basis. It considers such factors as the length of time and extent to which the fair value has been below the cost basis, the financial condition of the investee, and its ability and intent to hold the investment for a period of time that may be sufficient for an anticipated full recovery in market value. Accordingly, the Company considered declines in its investments to be temporary in nature, and did not consider its securities to be impaired as of December 28, 2014 and June 29, 2014.
	The contractual maturities of short-term investments as of December 28, 2014 were as follows (in thousands):
		Within One			After One,				After Five,				After Ten				Total
		Year			Within Five				Within Ten				Years
					Years				Years
	Municipal bonds		$23,593			$127,148				$34,415				$—				$185,156
	Corporate bonds	22,435			106,525				32,546				—				161,506
	Non-U.S. certificates of deposit	283,303			—				—				—				283,303
	Total short-term investments		$329,331			$233,673				$66,961				$—				$629,965

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	6 Months Ended
	Dec. 28, 2014
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments
	Under U.S. GAAP, fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the exit price) in an orderly transaction between market participants at the measurement date. In determining fair value, the Company uses various valuation approaches, including quoted market prices and discounted cash flows. U.S. GAAP also establishes a hierarchy for inputs used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are obtained from independent sources and can be validated by a third party, whereas unobservable inputs reflect assumptions regarding what a third party would use in pricing an asset or liability. The fair value hierarchy is categorized into three levels based on the reliability of inputs as follows:
	•	Level 1 - Valuations based on quoted prices in active markets for identical instruments that the Company is able to access. Since valuations are based on quoted prices that are readily and regularly available in an active market, valuation of these products does not entail a significant degree of judgment.
	•	Level 2 - Valuations based on quoted prices in active markets for instruments that are similar, or quoted prices in markets that are not active for identical or similar instruments, and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets.
	•	Level 3 - Valuations based on inputs that are unobservable and significant to the overall fair value measurement.
	The financial assets for which the Company performs recurring fair value remeasurements are cash equivalents, short-term investments and long-term investments. As of December 28, 2014, financial assets utilizing Level 1 inputs included money market funds, and financial assets utilizing Level 2 inputs included municipal bonds, corporate bonds, U.S. agency securities, non-U.S. certificates of deposit, non-U.S. government securities and common stock of non-U.S. corporations. Level 2 assets are valued using a third-party pricing service's consensus price, which is a weighted average price based on multiple sources. These sources determine prices utilizing market income models which factor in, where applicable, transactions of similar assets in active markets, transactions of identical assets in infrequent markets, interest rates, bond or credit default swap spreads and volatility. The Company did not have any financial assets requiring the use of Level 3 inputs as of December 28, 2014. There were no transfers between Level 1 and Level 2 during the six months ended December 28, 2014.
	The following table sets forth financial instruments carried at fair value within the U.S. GAAP hierarchy (in thousands):
		December 28, 2014								June 29, 2014
		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
	Assets:
	Cash equivalents:
	Non-U.S. certificates of deposit		$—		$156		$—		$156		$—		$—		$—		$—
	Money market funds	4,455		—		—		4,455		40,031		—		—		40,031
	Total cash equivalents	4,455		156		—		4,611		40,031		—		—		40,031
	Short-term investments:
	Municipal bonds	—		185,156		—		185,156		—		294,180		—		294,180
	Corporate bonds	—		161,506		—		161,506		—		202,346		—		202,346
	U.S. agency securities	—		—		—		—		—		19,135		—		19,135
	Non-U.S. certificates of deposit	—		283,303		—		283,303		—		352,928		—		352,928
	Non-U.S. government securities	—		—		—		—		—		7,053		—		7,053
	Total short-term investments	—		629,965		—		629,965		—		875,642		—		875,642
	Other long-term investments:
	Common stock of non-U.S. corporations	—		79,089		—		79,089		—		—		—		—
	Total other long-term investments	—		79,089		—		79,089		—		—		—		—
	Total assets		$4,455		$709,210		$—		$713,665		$40,031		$875,642		$—		$915,673

Intangible_Assets

Intangible Assets	6 Months Ended
	Dec. 28, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets
	The following table presents the components of intangible assets, net (in thousands):
		December 28, 2014							June 29, 2014
		Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
	Intangible assets with finite lives:
	Customer relationships		$137,440		($69,659	)		$67,781		$137,440		($66,970	)		$70,470
	Developed technology	162,760		(82,242		)	80,518		162,760		(72,921		)	89,839
	Non-compete agreements	10,244		(6,977		)	3,267		10,244		(5,997		)	4,247
	Trade names, finite-lived	520		(520		)	—		520		(516		)	4
	Patent and licensing rights	143,342		(46,863		)	96,479		134,607		(42,424		)	92,183
	Total intangible assets with finite lives	454,306		(206,261		)	248,045		445,571		(188,828		)	256,743
	Trade names, indefinite-lived	79,680					79,680		79,680					79,680
	Total intangible assets		$533,986		($206,261	)		$327,725		$525,251		($188,828	)		$336,423
	For the three and six months ended December 28, 2014, total amortization of finite-lived intangible assets was $9.0 million and $17.9 million, respectively. For the three and six months ended December 29, 2013, total amortization of finite-lived intangible assets was $9.4 million and $18.8 million, respectively.
	Total future amortization expense of finite-lived intangible assets is estimated to be as follows (in thousands):
	Fiscal Year Ending
	June 28, 2015 (remainder of fiscal 2015)		$17,562
	June 26, 2016	34,921
	June 25, 2017	32,910
	June 24, 2018	31,718
	June 30, 2019	19,150
	Thereafter	111,784
	Total future amortization expense		$248,045

Longterm_Debt

Long-term Debt	6 Months Ended
	Dec. 28, 2014
Long-term Debt, Unclassified [Abstract]
Long-term Debt	Long-term Debt
	As of December 28, 2014, the Company had a $150 million unsecured revolving line of credit under which the Company could borrow, repay and reborrow loans from time to time prior to its scheduled maturity date of August 12, 2017. This line of credit was repaid on January 9, 2015 when the Company entered into a new $500 million credit agreement with Wells Fargo Bank, National Association (Wells Fargo Bank) and a syndication of financial institutions. See Note 13, “Subsequent Event” for a description of the new credit agreement.
	The Company classifies balances outstanding under its line of credit as Long-term debt in the Consolidated Balance Sheets. At December 28, 2014, the Company had $150 million outstanding under the line of credit and nothing available for borrowing. The average interest rate was 0.86% for the three and six months ended December 28, 2014. The average commitment fee percentage was 0.08% for the three and six months ended December 28, 2014. The Company was in compliance with all covenants in the line of credit at December 28, 2014.

Shareholders_Equity

Shareholders' Equity	6 Months Ended
	Dec. 28, 2014
Stockholders' Equity Note [Abstract]
Shareholders' Equity	Shareholders’ Equity
	As of December 28, 2014, pursuant to an approval by the Board of Directors to an increase in the amount of the stock repurchase program, the Company is authorized to repurchase shares of its common stock having an aggregate purchase price not exceeding $550 million for all purchases from June 30, 2014 through the expiration of the program on June 28, 2015. During the six months ended December 28, 2014, the Company repurchased 9.3 million shares of common stock for $320.3 million under the stock repurchase program.

Earnings_Per_Share

Earnings Per Share	6 Months Ended
	Dec. 28, 2014
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share
	The following table presents the computation of basic earnings per share (in thousands, except per share amounts):
		Three Months Ended				Six Months Ended
		December 28,		December 29,		December 28,		December 29,
		2014		2013		2014		2013
	Net income		$12,151		$35,681		$23,281		$66,178
	Weighted average common shares	115,264		120,932		117,435		120,248
	Basic earnings per share		$0.11		$0.30		$0.20		$0.55
	The following computation reconciles the differences between the basic and diluted earnings per share presentations (in thousands, except per share amounts):
		Three Months Ended				Six Months Ended
		December 28,		December 29,		December 28,		December 29,
		2014		2013		2014		2013
	Net income		$12,151		$35,681		$23,281		$66,178
	Weighted average common shares - basic	115,264		120,932		117,435		120,248
	Dilutive effect of stock options, nonvested shares and Employee Stock Purchase Plan purchase rights	581		2,272		1,164		2,573
	Weighted average common shares - diluted	115,845		123,204		118,599		122,821
	Diluted earnings per share		$0.10		$0.29		$0.20		$0.54
	Potential common shares that would have the effect of increasing diluted earnings per share are considered to be anti-dilutive and as such, these shares are not included in calculating diluted earnings per share. For the three and six months ended December 28, 2014, there were 8.6 million and 6.5 million, respectively, of potential common shares not included in the calculation of diluted earnings per share because their effect was anti-dilutive. For the three and six months ended December 29, 2013, there were 3.1 million and 2.1 million, respectively, of potential common shares not included in the calculation of diluted earnings per share because their effect was anti-dilutive.

StockBased_Compensation

Stock-Based Compensation	6 Months Ended
	Dec. 28, 2014
Share-based Compensation [Abstract]
Stock-Based Compensation	Stock-Based Compensation
	Overview of Employee Stock-Based Compensation Plans
	The Company currently has one equity-based compensation plan, the 2013 Long-Term Incentive Compensation Plan (2013 LTIP), from which stock-based compensation awards can be granted to employees and directors. The 2013 LTIP provides for awards in the form of incentive stock options, non-qualified stock options, stock appreciation rights, restricted stock, restricted stock units, performance shares, performance units and other awards. The Company has other equity-based compensation plans that have been terminated so that no future grants can be made under those plans, but under which options, restricted stock and restricted stock units are currently outstanding.
	Prior to fiscal 2013, the Company’s stock-based awards had been service-based only.  Beginning in fiscal 2013, the Company began issuing grants of awards that also contain performance-based conditions.  Performance-based conditions are generally tied to future financial and/or operating performance of the Company. The compensation expense with respect to performance-based grants is recognized if the Company believes it is probable that the performance condition will be achieved. The Company reassesses the probability of the achievement of the performance condition at each reporting period, and adjusts the compensation expense for subsequent changes in the estimate or actual outcome. As with non-performance based awards, compensation expense is recognized over the vesting period. The vesting period runs from the date of grant to the expected date that the performance objective is likely to be achieved.
	The Company also has an Employee Stock Purchase Plan (ESPP) that provides employees with the opportunity to purchase common stock at a discount. The ESPP limits employee contributions to 15% of each employee’s compensation (as defined in the plan) and originally allowed employees to purchase shares at a 15% discount to the fair market value of common stock on the purchase date two times per year. The ESPP was amended in the second quarter of fiscal 2012 to increase the six-month participation period to a twelve-month participation period, divided into two equal six-month purchase periods, and to provide for a look-back feature. At the end of each six-month period in April and October, employees participating in the plan purchase the Company’s common stock through the ESPP at a 15% discount to the fair market value of the common stock on the first day of the twelve-month participation period or the purchase date, whichever is lower. The plan amendment also provides for an automatic reset feature to start participants on a new twelve-month participation period if the fair market value of common stock declines during the first six-month purchase period.
	Stock Option Awards
	The following table summarizes option activity as of December 28, 2014 and changes during the six months then ended (numbers of shares in thousands):
		Number of Shares		Weighted Average Exercise Price
	Outstanding at June 29, 2014	8,922			$41.85
	Granted	3,294			$44.93
	Exercised	(477	)		$29.15
	Forfeited or expired	(362	)		$47.99
	Outstanding at December 28, 2014	11,377			$43.08
	Restricted Stock Awards and Units
	A summary of nonvested restricted stock awards (RSAs) and restricted stock unit awards (RSUs) outstanding as of December 28, 2014, and changes during the six months then ended is as follows (numbers of awards and units in thousands):
		Number of		Weighted Average
		RSAs/RSUs		Grant-Date Fair Value
	Nonvested at June 29, 2014	860			$46.81
	Granted	433			$44.94
	Vested	(347	)		$46.15
	Forfeited	(38	)		$48.62
	Nonvested at December 28, 2014	908			$46.09
	Stock-Based Compensation Valuation and Expense
	The Company accounts for its employee stock-based compensation plans using the fair value method. The fair value method requires the Company to estimate the grant-date fair value of its stock-based awards and amortize this fair value to compensation expense over the requisite service period or vesting term.
	The Company uses the Black-Scholes option-pricing model to estimate the fair value of the Company’s stock option and ESPP awards. The determination of the fair value of stock-based payment awards on the date of grant using an option-pricing model is affected by the Company’s stock price as well as assumptions regarding a number of complex and subjective variables. These variables include the expected stock price volatility over the term of the awards, actual and projected employee stock option exercise behaviors, the risk-free interest rate and expected dividends. Due to the inherent limitations of option-valuation models, future events that are unpredictable and the estimation process utilized in determining the valuation of the stock-based awards, the ultimate value realized by award holders may vary significantly from the amounts expensed in the Company’s financial statements.
	For RSAs and RSUs, the grant-date fair value is based upon the market price of the Company’s common stock on the date of the grant. This fair value is then amortized to compensation expense over the requisite service period or vesting term.
	Stock-based compensation expense is recognized net of estimated forfeitures such that expense is recognized only for those stock-based awards that are expected to vest. A forfeiture rate is estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from initial estimates.
	Total stock-based compensation expense was as follows (in thousands):
		Three Months Ended					Six Months Ended
		December 28,			December 29,		December 28,		December 29,
		2014			2013		2014		2013
	Income Statement Classification:
	Cost of revenue, net		$3,448			$2,849		$6,353		$5,228
	Research and development	4,112			3,829		8,583		7,541
	Sales, general and administrative	8,876			8,994		18,260		17,481
	Total stock-based compensation expense		$16,436			$15,672		$33,196		$30,250

Income_Taxes

Income Taxes	6 Months Ended
	Dec. 28, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	The variation between the Company's effective income tax rate and the U.S. statutory rate of 35% is due to a percentage of the Company's projected income for the full year being derived from international locations with lower tax rates than the U.S. and the impact of tax credits available in the current year. A change in the mix of pretax income of the Company's various tax jurisdictions can have a material impact on the Company's periodic effective tax rate. The research and development credit, which had previously expired on December 31, 2013, was reinstated as part of the Tax Increase Prevention Act of 2014, enacted on December 19, 2014.  This legislation retroactively reinstated and extended the credit from the previous expiration date through December 31, 2014. The Company recognized a $1.9 million benefit for this credit in the three months ended December 28, 2014.
	U.S. GAAP requires a two-step approach to recognizing and measuring uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is cumulatively more than 50% likely to be realized upon ultimate settlement.
	As of June 29, 2014, the Company's liability for unrecognized tax benefits was $18.4 million. During the six months ended December 28, 2014, there was a $0.2 million decrease to the amount of unrecognized tax benefits following statute expirations. As a result, the total liability for unrecognized tax benefits as of December 28, 2014 was $18.2 million. If any portion of this $18.2 million is recognized, the Company will then include that portion in the computation of its effective tax rate. Although the ultimate timing of the resolution and/or closure of audits is highly uncertain, the Company believes it is reasonably possible that an immaterial amount of gross unrecognized tax benefits will change in the next 12 months.
	The Company files U.S. federal, U.S. state and foreign tax returns. For U.S. federal purposes, the Company is generally no longer subject to tax examinations for fiscal years prior to 2012. For U.S. state tax returns, the Company is generally no longer subject to tax examinations for fiscal years prior to 2010. For foreign purposes, the Company is generally no longer subject to tax examinations for tax periods 2004 and prior. Certain carryforward tax attributes generated in prior years remain subject to examination and adjustment. During the second quarter of fiscal 2015, the Company settled its examination with the French Tax Administration for the fiscal year ended June 26, 2011 (fiscal 2011) through the fiscal year ended June 29, 2014 (fiscal 2014), resulting in no additional tax expense.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Dec. 28, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies
	Warranties
	The following table summarizes the changes in the Company's product warranty liabilities (in thousands):
	Balance at June 29, 2014		$6,822
	Warranties accrued in current period	4,086
	Expenditures	(3,086		)
	Balance at December 28, 2014		$7,822
	Product warranties are estimated and recognized at the time the Company recognizes revenue. The warranty periods range from 90 days to 10 years. The Company accrues warranty liabilities at the time of sale, based on historical and projected incident rates and expected future warranty costs. The warranty reserves, which are primarily related to Lighting Products, are evaluated on a quarterly basis based on various factors including historical warranty claims, assumptions about the frequency of warranty claims, and assumptions about the frequency of product failures derived from quality testing, field monitoring and the Company's reliability estimates. As of December 28, 2014, $0.9 million of the Company's product warranty liabilities were classified as long-term.
	Litigation
	The Company is currently a party to various legal proceedings.  While management presently believes that the ultimate outcome of such proceedings, individually and in the aggregate, will not materially harm the Company’s financial position, cash flows, or overall trends in results of operations, legal proceedings are subject to inherent uncertainties, and unfavorable rulings could occur.  An unfavorable ruling could include money damages or, in matters for which injunctive relief or other conduct remedies may be sought, an injunction prohibiting the Company from selling one or more products at all or in particular ways.  Were unfavorable final outcomes to occur, there exists the possibility of a material adverse impact on the Company’s business, results of operation, financial position and overall trends.  The outcomes in these matters are not reasonably estimable.

Reportable_Segments

Reportable Segments	6 Months Ended
	Dec. 28, 2014
Segment Reporting [Abstract]
Reportable Segments	Reportable Segments
	The Company's operating and reportable segments are:
	•	LED Products
	•	Lighting Products
	•	Power and RF Products
	Reportable Segments Description
	The Company's LED Products segment includes LED chips, LED components and SiC materials. The Company's Lighting Products segment primarily consists of LED lighting systems and bulbs. The Company's Power and RF Products segment includes power devices and RF devices.
	Financial Results by Reportable Segment
	The table below reflects the results of the Company's reportable segments as reviewed by the Chief Operating Decision Maker (CODM) for the three and six months ended December 28, 2014 and December 29, 2013. The Company's CODM is the Chief Executive Officer. The Company used the same accounting policies to derive the segment results reported below as those used in the Company's consolidated financial statements.
	The Company's CODM does not review inter-segment transactions when evaluating segment performance and allocating resources to each segment, and inter-segment transactions are not included in the segment revenue presented in the table below. As such, total segment revenue in the table below is equal to the Company's consolidated revenue.
	The Company's CODM reviews gross profit as the lowest and only level of segment profit. As such, all items below gross profit in the Consolidated Statements of Income must be included to reconcile the consolidated gross profit presented in the table below to the Company's consolidated income before income taxes.
	In order to determine gross profit for each reportable segment, the Company allocates direct costs and indirect costs to each segment's cost of revenue. The Company allocates indirect costs, such as employee benefits for manufacturing employees, shared facilities services, information technology, purchasing, and customer service, when the costs are identifiable and beneficial to the reportable segment. The Company allocates these indirect costs based on a reasonable measure of utilization that considers the specific facts and circumstances of the costs being allocated.
	Unallocated costs in the table below consisted primarily of manufacturing employees’ stock-based compensation, profit sharing and quarterly or annual incentive compensation and matching contributions under the Company’s 401(k) plan. These costs were not allocated to the reportable segments’ gross profit because the Company’s CODM does not review them regularly when evaluating segment performance and allocating resources.
	Revenue, gross profit and gross margin for each of the Company's segments were as follows (in thousands, except percentages):
		Three Months Ended						Six Months Ended
		December 28,			December 29,			December 28,			December 29,
		2014			2013			2014			2013
	Revenue:
	LED Products revenue		$151,877			$215,022			$325,467			$433,045
	Lighting Products revenue	230,168			173,656			453,254			321,574
	Power and RF Products revenue	31,112			26,408			62,108			51,473
	Total revenue		$413,157			$415,086			$840,829			$806,092
	Gross Profit and Gross Margin:
	LED Products gross profit		$59,424			$97,644			$127,048			$199,297
	LED Products gross margin	39.1		%	45.4		%	39		%	46		%
	Lighting Products gross profit	64,701			48,426			120,293			88,244
	Lighting Products gross margin	28.1		%	27.9		%	26.5		%	27.4		%
	Power and RF Products gross profit	17,260			15,321			35,117			28,777
	Power and RF Products gross margin	55.5		%	58		%	56.5		%	55.9		%
	Total segment gross profit	141,385			161,391			282,458			316,318
	Unallocated costs	(4,606		)	(5,613		)	(9,859		)	(9,783		)
	Consolidated gross profit		$136,779			$155,778			$272,599			$306,535
	Consolidated gross margin	33.1		%	37.5		%	32.4		%	38		%
	Assets by Reportable Segment
	Inventories are the only assets reviewed by the Company's CODM when evaluating segment performance and allocating resources to the segments. The CODM reviews all of the Company's assets other than inventories on a consolidated basis.
	Unallocated inventories in the table below were not allocated to the reportable segments because the Company’s CODM does not review them when evaluating performance and allocating resources to each segment. Unallocated inventories consisted primarily of manufacturing employees’ stock-based compensation, profit sharing and quarterly or annual incentive compensation and matching contributions under the Company’s 401(k) plan.
	Inventories for each of the Company's segments are as follows (in thousands):
		December 28,			June 29,
		2014			2014
	LED Products	$	135,456		$	123,249
	Lighting Products	181,848			148,757
	Power and RF Products	10,190			8,019
	Total segment inventories	327,494			280,025
	Unallocated inventories	5,054			4,755
	Consolidated inventories	$	332,548		$	284,780

Subsequent_Event_Subsequent_Ev

Subsequent Event Subsequent Event	6 Months Ended
	Dec. 28, 2014
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event
	Credit Agreement with Wells Fargo Bank
	On January 9, 2015, the Company entered into a new credit agreement (New Credit Agreement) with Wells Fargo Bank as administrative agent and lender, E-conolight LLC, a domestic subsidiary of the Company, as guarantor, and the other lenders party thereto.
	The New Credit Agreement provides for a $500 million revolving line of credit, under which the Company may borrow, repay and reborrow loans from time to time prior to its scheduled maturity date of January 9, 2020 (Maturity Date). The obligations of the Company under the New Credit Agreement are collateralized by 65% of the equity interests of the first-tier foreign subsidiaries of the Company. Proceeds of the initial loans made under the New Credit Agreement were used to repay amounts outstanding under the Company’s previous credit agreement with Wells Fargo Bank, and proceeds of any additional loans may be used for working capital, capital expenditures, acquisitions and other general corporate purposes. The Company may prepay the loans under the New Credit Agreement in whole or in part at any time without premium or penalty, subject to customary breakage costs. The Company’s existing and future material domestic subsidiaries are required to guarantee its obligations under the New Credit Agreement.
	The loans bear interest, at the Company’s option, at either a London Interbank Offered Rate (LIBOR) rate for a period of one, two, three or six months as elected by the Company (or twelve months if elected by the Company and agreed by all relevant lenders) and as determined in accordance with the New Credit Agreement, plus a spread of 0.80% to 1.50% (depending on a ratio of funded debt to Earnings Before Interest Taxes Depreciation and Amortization (EBITDA) as determined in accordance with the New Credit Agreement), or at a base rate equal to the prime rate announced by the administrative agent from time to time (or, if higher either the Federal Funds Rate plus 0.50% or the one month LIBOR rate plus 1.0%), plus a spread of 0.0% to 0.50% (depending on a ratio of funded debt to EBITDA as determined in accordance with the New Credit Agreement). Principal, together with all accrued and unpaid interest, is due and payable on the Maturity Date. The default rate under the New Credit Agreement is an additional 2.0% per annum over the otherwise applicable rate.
	The Company is also obligated to pay a quarterly fee, payable in arrears, based on the daily unused amount of the line of credit at a rate of 0.09% to 0.20%, with such rate determined based on the ratio described above.
	The New Credit Agreement contains customary affirmative and negative covenants, including the required compliance with financial covenants described below, as well as customary events of default. The New Credit Agreement requires the Company to maintain a ratio of consolidated funded indebtedness to EBITDA equal to or less than 3.00 to 1.00, and a ratio of consolidated EBITDA to interest expense greater than or equal to 3.00 to 1.00, in each case determined in accordance with the New Credit Agreement.

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	6 Months Ended
	Dec. 28, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation
	The consolidated balance sheet at December 28, 2014, the consolidated statements of income for the three and six months ended December 28, 2014 and December 29, 2013, the consolidated statements of comprehensive income for the three and six months ended December 28, 2014 and December 29, 2013, and the consolidated statements of cash flows for the six months ended December 28, 2014 and December 29, 2013 (collectively, the consolidated financial statements) have been prepared by the Company and have not been audited. In the opinion of management, all normal and recurring adjustments necessary to present fairly the consolidated financial position, results of operations and cash flows at December 28, 2014, and for all periods presented, have been made. All intercompany accounts and transactions have been eliminated. The consolidated balance sheet at June 29, 2014 has been derived from the audited financial statements as of that date.
	These financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) for interim information and with the instructions to Form 10-Q and Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for annual financial statements. These financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended June 29, 2014 (fiscal 2014). The results of operations for the three and six months ended December 28, 2014 are not necessarily indicative of the operating results that may be attained for the entire fiscal year ending June 28, 2015 (fiscal 2015).
	The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, and the disclosure of contingent assets and liabilities. Actual amounts could differ materially from those estimates.
	Certain fiscal 2014 amounts in the accompanying consolidated financial statements have been reclassified to conform to the fiscal 2015 presentation. These reclassifications had no effect on previously reported consolidated net income or shareholders’ equity.
New Accounting Standards	New Accounting Standards
	Revenue from Contracts with Customers
	In May 2014, the FASB issued Accounting Standards Update (ASU) No. 2014-09: Revenue from Contracts with Customers (Topic 606). The ASU establishes a principles-based approach for accounting for revenue arising from contracts with customers and supersedes existing revenue recognition guidance. The ASU provides that an entity should apply a five-step approach for recognizing revenue, including (1) identify the contract with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when, or as, the entity satisfies a performance obligation. Also, the entity must provide various disclosures concerning the nature, amount and timing of revenue and cash flows arising from contracts with customers. The effective date will be the first quarter of the Company's fiscal year ending June 24, 2018, using one of two retrospective application methods. The Company is currently analyzing the impact of this new accounting guidance.
Stock-Based Compensation Valuation and Expense	Stock-Based Compensation Valuation and Expense
	The Company accounts for its employee stock-based compensation plans using the fair value method. The fair value method requires the Company to estimate the grant-date fair value of its stock-based awards and amortize this fair value to compensation expense over the requisite service period or vesting term.
	The Company uses the Black-Scholes option-pricing model to estimate the fair value of the Company’s stock option and ESPP awards. The determination of the fair value of stock-based payment awards on the date of grant using an option-pricing model is affected by the Company’s stock price as well as assumptions regarding a number of complex and subjective variables. These variables include the expected stock price volatility over the term of the awards, actual and projected employee stock option exercise behaviors, the risk-free interest rate and expected dividends. Due to the inherent limitations of option-valuation models, future events that are unpredictable and the estimation process utilized in determining the valuation of the stock-based awards, the ultimate value realized by award holders may vary significantly from the amounts expensed in the Company’s financial statements.
	For RSAs and RSUs, the grant-date fair value is based upon the market price of the Company’s common stock on the date of the grant. This fair value is then amortized to compensation expense over the requisite service period or vesting term.
	Stock-based compensation expense is recognized net of estimated forfeitures such that expense is recognized only for those stock-based awards that are expected to vest. A forfeiture rate is estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from initial estimates.
Financial Results by Reportable Segment	Financial Results by Reportable Segment
	The table below reflects the results of the Company's reportable segments as reviewed by the Chief Operating Decision Maker (CODM) for the three and six months ended December 28, 2014 and December 29, 2013. The Company's CODM is the Chief Executive Officer. The Company used the same accounting policies to derive the segment results reported below as those used in the Company's consolidated financial statements.
	The Company's CODM does not review inter-segment transactions when evaluating segment performance and allocating resources to each segment, and inter-segment transactions are not included in the segment revenue presented in the table below. As such, total segment revenue in the table below is equal to the Company's consolidated revenue.
	The Company's CODM reviews gross profit as the lowest and only level of segment profit. As such, all items below gross profit in the Consolidated Statements of Income must be included to reconcile the consolidated gross profit presented in the table below to the Company's consolidated income before income taxes.
	In order to determine gross profit for each reportable segment, the Company allocates direct costs and indirect costs to each segment's cost of revenue. The Company allocates indirect costs, such as employee benefits for manufacturing employees, shared facilities services, information technology, purchasing, and customer service, when the costs are identifiable and beneficial to the reportable segment. The Company allocates these indirect costs based on a reasonable measure of utilization that considers the specific facts and circumstances of the costs being allocated.
	Unallocated costs in the table below consisted primarily of manufacturing employees’ stock-based compensation, profit sharing and quarterly or annual incentive compensation and matching contributions under the Company’s 401(k) plan. These costs were not allocated to the reportable segments’ gross profit because the Company’s CODM does not review them regularly when evaluating segment performance and allocating resources.

Financial_Statement_Details_Ta

Financial Statement Details (Tables)	6 Months Ended
	Dec. 28, 2014
Financial Statement Details [Abstract]
Summary of the Components of Accounts Receivable, Net	The following table summarizes the components of accounts receivable, net (in thousands):
		December 28, 2014				June 29, 2014
	Billed trade receivables		$256,350				$255,374
	Unbilled contract receivables	2,131				1,557
		258,481				256,931
	Allowance for sales returns, discounts and other incentives	(35,869		)		(29,010		)
	Allowance for bad debts	(3,652		)		(2,761		)
	Accounts receivable, net		$218,960				$225,160
Summary of the Components of Inventories	The following table summarizes the components of inventories (in thousands):
		December 28, 2014				June 29, 2014
	Raw material		$98,177				$95,594
	Work-in-progress	114,378				92,889
	Finished goods	119,993				96,297
	Inventories		$332,548				$284,780
Summary of the Components of Other Current Liabilities	The following table summarizes the components of other current liabilities (in thousands):
		December 28, 2014				June 29, 2014
	Accrued taxes		$18,148				$19,835
	Accrued professional fees	6,281				5,373
	Accrued warranty	6,945				5,842
	Accrued other	6,414				7,936
	Other current liabilities		$37,788				$38,986
Summary of the Components of Accumulated Other Comprehensive Income, Net of Taxes	The following table summarizes the components of accumulated other comprehensive income, net of taxes (in thousands):
		December 28, 2014				June 29, 2014
	Currency translation gain		$6,647				$8,549
	Net unrealized gain on available-for-sale securities	1,545				2,856
	Accumulated other comprehensive income, net of taxes		$8,192				$11,405
Summary of the Components of Non-operating Income, Net	The following table summarizes the components of non-operating income, net (in thousands):
		Three Months Ended							Six Months Ended
		December 28, 2014				December 29, 2013			December 28, 2014			December 29, 2013
	Foreign currency (loss) gain, net		($2,365	)			$213			($2,596	)		$477
	Gain on sale of investments, net	774				—			776			10
	Gain on equity method investment	679				—			679			—
	Interest income, net	2,586				2,806			5,618			5,147
	Other, net	54				384			155			587
	Non-operating income, net		$1,728				$3,403			$4,632			$6,221
Summary of the Amounts Reclassified Out of Accumulated Other Comprehensive Income	The following table summarizes the amounts reclassified out of accumulated other comprehensive income, net of taxes (in thousands):
	Accumulated Other Comprehensive Income Component		Amount Reclassified Out of Accumulated Other Comprehensive Income												Affected Line Item in the Consolidated Statements of Income
			Three Months Ended							Six Months Ended
			December 28, 2014				December 29, 2013			December 28, 2014			December 29, 2013
	Net unrealized gain on available-for-sale securities, net of taxes			$774				$—			$776			$10	Non-operating income, net
			774				—			776			10		Income before income taxes
			(15		)		—			88			2		Income tax (benefit) expense
				$789				$—			$688			$8	Net income

Investments_Tables

Investments (Tables)	6 Months Ended
	Dec. 28, 2014
Investments, Debt and Equity Securities [Abstract]
Summary of Short-term Investments by Type	The following tables summarize short-term investments (in thousands):
			December 28, 2014
			Amortized			Gross Unrealized				Gross				Estimated Fair
			Cost			Gains				Unrealized				Value
										Losses
	Municipal bonds			$183,806			$1,504				($154	)			$185,156
	Corporate bonds		160,346			1,537				(377		)		161,506
	U.S. agency securities		—			—				—				—
	Non-U.S. certificates of deposit		283,303			—				—				283,303
	Non-U.S. government securities		—			—				—				—
	Total short-term investments			$627,455			$3,041				($531	)			$629,965
			June 29, 2014
			Amortized			Gross				Gross				Estimated Fair
			Cost			Unrealized				Unrealized				Value
						Gains				Losses
	Municipal bonds			$291,869			$2,323				($12	)			$294,180
	Corporate bonds		200,177			2,283				(114		)		202,346
	U.S. agency securities		18,994			141				—				19,135
	Non-U.S. certificates of deposit		352,928			—				—				352,928
	Non-U.S. government securities		7,025			28				—				7,053
	Total short-term investments			$870,993			$4,775				($126	)			$875,642
Summary of Gross Unrealized Losses and Estimated Fair Value of Short-term Investments, Aggregated by Investment Type and Length of Time	The following tables present the gross unrealized losses and estimated fair value of the Company's short-term investments, aggregated by investment type and the length of time that individual securities have been in a continuous unrealized loss position (in thousands, except numbers of securities):
			December 28, 2014
			Less than 12 Months							Greater than 12 Months								Total
			Fair Value			Unrealized Loss				Fair Value				Unrealized Loss				Fair Value		Unrealized Loss
	Municipal bonds			$35,417			($154	)			$—				$—				$35,417		($154	)
	Corporate bonds		58,229			(341		)		2,212				(36		)		60,441		(377		)
	Total			$93,646			($495	)			$2,212				($36	)			$95,858		($531	)
	Number of securities with an unrealized loss					47								1						48
			June 29, 2014
			Less than 12 Months							Greater than 12 Months								Total
			Fair Value			Unrealized Loss				Fair Value				Unrealized Loss				Fair Value		Unrealized Loss
	Municipal bonds			$7,906			($8	)			$1,520				($4	)			$9,426		($12	)
	Corporate bonds		15,696			(31		)		13,049				(83		)		28,745		(114		)
	Total			$23,602			($39	)			$14,569				($87	)			$38,171		($126	)
	Number of securities with an unrealized loss					13								7						20
Contractual Maturities of Short-term Investments by Type	The contractual maturities of short-term investments as of December 28, 2014 were as follows (in thousands):
		Within One			After One,				After Five,				After Ten				Total
		Year			Within Five				Within Ten				Years
					Years				Years
	Municipal bonds		$23,593			$127,148				$34,415				$—				$185,156
	Corporate bonds	22,435			106,525				32,546				—				161,506
	Non-U.S. certificates of deposit	283,303			—				—				—				283,303
	Total short-term investments		$329,331			$233,673				$66,961				$—				$629,965

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	6 Months Ended
	Dec. 28, 2014
Fair Value Disclosures [Abstract]
Financial Instruments Carried at Fair Value	The following table sets forth financial instruments carried at fair value within the U.S. GAAP hierarchy (in thousands):
		December 28, 2014								June 29, 2014
		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
	Assets:
	Cash equivalents:
	Non-U.S. certificates of deposit		$—		$156		$—		$156		$—		$—		$—		$—
	Money market funds	4,455		—		—		4,455		40,031		—		—		40,031
	Total cash equivalents	4,455		156		—		4,611		40,031		—		—		40,031
	Short-term investments:
	Municipal bonds	—		185,156		—		185,156		—		294,180		—		294,180
	Corporate bonds	—		161,506		—		161,506		—		202,346		—		202,346
	U.S. agency securities	—		—		—		—		—		19,135		—		19,135
	Non-U.S. certificates of deposit	—		283,303		—		283,303		—		352,928		—		352,928
	Non-U.S. government securities	—		—		—		—		—		7,053		—		7,053
	Total short-term investments	—		629,965		—		629,965		—		875,642		—		875,642
	Other long-term investments:
	Common stock of non-U.S. corporations	—		79,089		—		79,089		—		—		—		—
	Total other long-term investments	—		79,089		—		79,089		—		—		—		—
	Total assets		$4,455		$709,210		$—		$713,665		$40,031		$875,642		$—		$915,673

Intangible_Assets_Tables

Intangible Assets (Tables)	6 Months Ended
	Dec. 28, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Components of intangible assets, net	The following table presents the components of intangible assets, net (in thousands):
		December 28, 2014							June 29, 2014
		Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
	Intangible assets with finite lives:
	Customer relationships		$137,440		($69,659	)		$67,781		$137,440		($66,970	)		$70,470
	Developed technology	162,760		(82,242		)	80,518		162,760		(72,921		)	89,839
	Non-compete agreements	10,244		(6,977		)	3,267		10,244		(5,997		)	4,247
	Trade names, finite-lived	520		(520		)	—		520		(516		)	4
	Patent and licensing rights	143,342		(46,863		)	96,479		134,607		(42,424		)	92,183
	Total intangible assets with finite lives	454,306		(206,261		)	248,045		445,571		(188,828		)	256,743
	Trade names, indefinite-lived	79,680					79,680		79,680					79,680
	Total intangible assets		$533,986		($206,261	)		$327,725		$525,251		($188,828	)		$336,423
Schedule of future amortization expense of finite-lived intangible assets	Total future amortization expense of finite-lived intangible assets is estimated to be as follows (in thousands):
	Fiscal Year Ending
	June 28, 2015 (remainder of fiscal 2015)		$17,562
	June 26, 2016	34,921
	June 25, 2017	32,910
	June 24, 2018	31,718
	June 30, 2019	19,150
	Thereafter	111,784
	Total future amortization expense		$248,045

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	6 Months Ended
	Dec. 28, 2014
Earnings Per Share [Abstract]
Basic Earnings Per Share Computation	The following table presents the computation of basic earnings per share (in thousands, except per share amounts):
		Three Months Ended				Six Months Ended
		December 28,		December 29,		December 28,		December 29,
		2014		2013		2014		2013
	Net income		$12,151		$35,681		$23,281		$66,178
	Weighted average common shares	115,264		120,932		117,435		120,248
	Basic earnings per share		$0.11		$0.30		$0.20		$0.55
Diluted Earnings Per Share Computation	The following computation reconciles the differences between the basic and diluted earnings per share presentations (in thousands, except per share amounts):
		Three Months Ended				Six Months Ended
		December 28,		December 29,		December 28,		December 29,
		2014		2013		2014		2013
	Net income		$12,151		$35,681		$23,281		$66,178
	Weighted average common shares - basic	115,264		120,932		117,435		120,248
	Dilutive effect of stock options, nonvested shares and Employee Stock Purchase Plan purchase rights	581		2,272		1,164		2,573
	Weighted average common shares - diluted	115,845		123,204		118,599		122,821
	Diluted earnings per share		$0.10		$0.29		$0.20		$0.54

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	6 Months Ended
	Dec. 28, 2014
Share-based Compensation [Abstract]
Summary of Outstanding Option Awards	The following table summarizes option activity as of December 28, 2014 and changes during the six months then ended (numbers of shares in thousands):
		Number of Shares		Weighted Average Exercise Price
	Outstanding at June 29, 2014	8,922			$41.85
	Granted	3,294			$44.93
	Exercised	(477	)		$29.15
	Forfeited or expired	(362	)		$47.99
	Outstanding at December 28, 2014	11,377			$43.08
Summary of Nonvested Shares of Restricted Stock Awards and Restricted Stock Unit Awards Outstanding	A summary of nonvested restricted stock awards (RSAs) and restricted stock unit awards (RSUs) outstanding as of December 28, 2014, and changes during the six months then ended is as follows (numbers of awards and units in thousands):
		Number of		Weighted Average
		RSAs/RSUs		Grant-Date Fair Value
	Nonvested at June 29, 2014	860			$46.81
	Granted	433			$44.94
	Vested	(347	)		$46.15
	Forfeited	(38	)		$48.62
	Nonvested at December 28, 2014	908			$46.09
Summary of Total Stock-Based Compensation Expense	Total stock-based compensation expense was as follows (in thousands):
		Three Months Ended					Six Months Ended
		December 28,			December 29,		December 28,		December 29,
		2014			2013		2014		2013
	Income Statement Classification:
	Cost of revenue, net		$3,448			$2,849		$6,353		$5,228
	Research and development	4,112			3,829		8,583		7,541
	Sales, general and administrative	8,876			8,994		18,260		17,481
	Total stock-based compensation expense		$16,436			$15,672		$33,196		$30,250

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	6 Months Ended
	Dec. 28, 2014
Commitments and Contingencies Disclosure [Abstract]
Summary of changes in product warranty liabilities	The following table summarizes the changes in the Company's product warranty liabilities (in thousands):
	Balance at June 29, 2014		$6,822
	Warranties accrued in current period	4,086
	Expenditures	(3,086		)
	Balance at December 28, 2014		$7,822

Reportable_Segments_Tables

Reportable Segments (Tables)	6 Months Ended
	Dec. 28, 2014
Segment Reporting [Abstract]
Revenues, Gross Profit, Gross Margin, and Inventories by Segment	Revenue, gross profit and gross margin for each of the Company's segments were as follows (in thousands, except percentages):
		Three Months Ended						Six Months Ended
		December 28,			December 29,			December 28,			December 29,
		2014			2013			2014			2013
	Revenue:
	LED Products revenue		$151,877			$215,022			$325,467			$433,045
	Lighting Products revenue	230,168			173,656			453,254			321,574
	Power and RF Products revenue	31,112			26,408			62,108			51,473
	Total revenue		$413,157			$415,086			$840,829			$806,092
	Gross Profit and Gross Margin:
	LED Products gross profit		$59,424			$97,644			$127,048			$199,297
	LED Products gross margin	39.1		%	45.4		%	39		%	46		%
	Lighting Products gross profit	64,701			48,426			120,293			88,244
	Lighting Products gross margin	28.1		%	27.9		%	26.5		%	27.4		%
	Power and RF Products gross profit	17,260			15,321			35,117			28,777
	Power and RF Products gross margin	55.5		%	58		%	56.5		%	55.9		%
	Total segment gross profit	141,385			161,391			282,458			316,318
	Unallocated costs	(4,606		)	(5,613		)	(9,859		)	(9,783		)
	Consolidated gross profit		$136,779			$155,778			$272,599			$306,535
	Consolidated gross margin	33.1		%	37.5		%	32.4		%	38		%
	Inventories for each of the Company's segments are as follows (in thousands):
		December 28,			June 29,
		2014			2014
	LED Products	$	135,456		$	123,249
	Lighting Products	181,848			148,757
	Power and RF Products	10,190			8,019
	Total segment inventories	327,494			280,025
	Unallocated inventories	5,054			4,755
	Consolidated inventories	$	332,548		$	284,780

Basis_of_Presentation_Narrativ

Basis of Presentation Narrative (Details)	3 Months Ended
	Dec. 28, 2014
	reportable_segments
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of Reportable Segments	3

Financial_Statement_Details_Su

Financial Statement Details (Summary of the Components of Accounts Receivable, Net) (Details) (USD $)	Dec. 28, 2014	Jun. 29, 2014
In Thousands, unless otherwise specified
Accounts Receivable, Net, Current [Abstract]
Accounts receivable, gross	$258,481	$256,931
Allowance for bad debts	-3,652	-2,761
Accounts receivable, net	218,960	225,160
Allowance for sales returns, discounts and other incentives [Member]
Accounts Receivable, Net, Current [Abstract]
Allowance for sales returns, discounts and other incentives	-35,869	-29,010
Billed trade receivables [Member]
Accounts Receivable, Net, Current [Abstract]
Accounts receivable, gross	256,350	255,374
Unbilled contract receivables [Member]
Accounts Receivable, Net, Current [Abstract]
Accounts receivable, gross	$2,131	$1,557

Financial_Statement_Details_Su1

Financial Statement Details (Summary of the Components of Inventories) (Details) (USD $)	Dec. 28, 2014	Jun. 29, 2014
In Thousands, unless otherwise specified
Inventory, Net [Abstract]
Raw material	$98,177	$95,594
Work-in-progress	114,378	92,889
Finished goods	119,993	96,297
Inventories	$332,548	$284,780

Financial_Statement_Details_Su2

Financial Statement Details (Summary of the Components of Other Current Liabilities) (Details) (USD $)	Dec. 28, 2014	Jun. 29, 2014
In Thousands, unless otherwise specified
Accrued Liabilities, Current [Abstract]
Accrued taxes	$18,148	$19,835
Accrued professional fees	6,281	5,373
Accrued warranty	6,945	5,842
Accrued other	6,414	7,936
Other current liabilities	$37,788	$38,986

Financial_Statement_Details_Su3

Financial Statement Details (Summary of the Components of Accumulated Other Comprehensive Income, Net of Taxes) (Details) (USD $)	Dec. 28, 2014	Jun. 29, 2014
In Thousands, unless otherwise specified
Financial Statement Details [Abstract]
Currency translation gain	$6,647	$8,549
Net unrealized gain on available-for-sale securities	1,545	2,856
Accumulated other comprehensive income, net of taxes	$8,192	$11,405

Financial_Statement_Details_Su4

Financial Statement Details (Summary of the Components of Non-operating Income, Net) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 28, 2014	Dec. 29, 2013
Other Income and Expenses [Abstract]
Foreign currency (loss) gain, net	($2,365)	$213	($2,596)	$477
Gain on sale of investments, net	774	0	776	10
Gain on equity method investment	679	0	679	0
Interest income, net	2,586	2,806	5,618	5,147
Other, net	54	384	155	587
Non-operating income, net	$1,728	$3,403	$4,632	$6,221

Financial_Statement_Details_Su5

Financial Statement Details (Summary of the Amounts Reclassified Out of Accumulated Other Comprehensive Income) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 28, 2014	Dec. 29, 2013
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Non-operating income, net	$1,728	$3,403	$4,632	$6,221
Income before income taxes	11,913	38,786	26,274	78,396
Income tax (benefit) expense	-238	3,105	2,993	12,218
Net income	12,151	35,681	23,281	66,178
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Non-operating income, net	774	0	776	10
Income before income taxes	774	0	776	10
Income tax (benefit) expense	-15	0	88	2
Net income	$789	$0	$688	$8

Investments_Investments_Narrat

Investments Investments (Narrative) (Details)	Dec. 28, 2014
Investments, Debt and Equity Securities [Abstract]
Equity Method Investment, Ownership Percentage	13.00%

Investments_Summary_of_Shortte

Investments (Summary of Short-term Investments by Type) (Details) (USD $)	Dec. 28, 2014	Jun. 29, 2014
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$627,455	$870,993
Gross Unrealized Gains	3,041	4,775
Gross Unrealized Losses	-531	-126
Estimated Fair Value	629,965	875,642
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	183,806	291,869
Gross Unrealized Gains	1,504	2,323
Gross Unrealized Losses	-154	-12
Estimated Fair Value	185,156	294,180
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	160,346	200,177
Gross Unrealized Gains	1,537	2,283
Gross Unrealized Losses	-377	-114
Estimated Fair Value	161,506	202,346
U.S. Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	0	18,994
Gross Unrealized Gains	0	141
Gross Unrealized Losses	0	0
Estimated Fair Value	0	19,135
Non-U.S. Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	283,303	352,928
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	283,303	352,928
Non-U.S. Government Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	0	7,025
Gross Unrealized Gains	0	28
Gross Unrealized Losses	0	0
Estimated Fair Value	$0	$7,053

Investments_Summary_of_Gross_U

Investments (Summary of Gross Unrealized Losses and Estimated Fair Value of Short-term Investments, Aggregated by Investment Type and Length of Time) (Details) (USD $)	Dec. 28, 2014	Jun. 29, 2014
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	$93,646	$23,602
Unrealized Loss, Less than 12 Months	-495	-39
Fair Value, Greater than 12 Months	2,212	14,569
Unrealized Loss, Greater than 12 Months	-36	-87
Fair Value, Total	95,858	38,171
Unrealized Loss, Total	-531	-126
Number of Securities with an Unrealized Loss, Less than 12 Months	47	13
Number of Securities with an Unrealized Loss, Greater than 12 Months	1	7
Number of Securities with an Unrealized Loss, Total	48	20
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	35,417	7,906
Unrealized Loss, Less than 12 Months	-154	-8
Fair Value, Greater than 12 Months	0	1,520
Unrealized Loss, Greater than 12 Months	0	-4
Fair Value, Total	35,417	9,426
Unrealized Loss, Total	-154	-12
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	58,229	15,696
Unrealized Loss, Less than 12 Months	-341	-31
Fair Value, Greater than 12 Months	2,212	13,049
Unrealized Loss, Greater than 12 Months	-36	-83
Fair Value, Total	60,441	28,745
Unrealized Loss, Total	($377)	($114)

Investments_Contractual_Maturi

Investments (Contractual Maturities of Short-term Investments by Type) (Details) (USD $)	Dec. 28, 2014	Jun. 29, 2014
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Within One Year	$329,331
After One, Within Five Years	233,673
After Five, Within Ten Years	66,961
After Ten Years	0
Total	629,965	875,642
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One Year	23,593
After One, Within Five Years	127,148
After Five, Within Ten Years	34,415
After Ten Years	0
Total	185,156
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One Year	22,435
After One, Within Five Years	106,525
After Five, Within Ten Years	32,546
After Ten Years	0
Total	161,506
Non-U.S. Certificates of Deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Within One Year	283,303
After One, Within Five Years	0
After Five, Within Ten Years	0
After Ten Years	0
Total	$283,303

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Financial Instruments Carried at Fair Value) (Details) (USD $)	Dec. 28, 2014	Jun. 29, 2014
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value transfers level 1 to level 2	$0
Fair value transfers, level 2 to level 1	0
Assets, Fair Value Disclosure [Abstract]
Short-term investments	629,965	875,642
Other long-term investments	79,089	0
Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	4,611	40,031
Short-term investments	629,965	875,642
Other long-term investments	79,089	0
Total assets	713,665	915,673
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	4,455	40,031
Short-term investments	0	0
Other long-term investments	0	0
Total assets	4,455	40,031
Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	156	0
Short-term investments	629,965	875,642
Other long-term investments	79,089	0
Total assets	709,210	875,642
Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Short-term investments	0	0
Other long-term investments	0	0
Total assets	0	0
Municipal Bonds [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	185,156	294,180
Municipal Bonds [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	185,156	294,180
Municipal Bonds [Member] | Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Municipal Bonds [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	185,156	294,180
Municipal Bonds [Member] | Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Corporate Bonds [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	161,506	202,346
Corporate Bonds [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	161,506	202,346
Corporate Bonds [Member] | Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Corporate Bonds [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	161,506	202,346
Corporate Bonds [Member] | Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
U.S. Agency Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	19,135
U.S. Agency Securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	19,135
U.S. Agency Securities [Member] | Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
U.S. Agency Securities [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	19,135
U.S. Agency Securities [Member] | Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Non-U.S. Certificates of Deposit [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	283,303	352,928
Non-U.S. Certificates of Deposit [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	283,303	352,928
Non-U.S. Certificates of Deposit [Member] | Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Non-U.S. Certificates of Deposit [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	283,303	352,928
Non-U.S. Certificates of Deposit [Member] | Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Non-U.S. Government Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	7,053
Non-U.S. Government Securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	7,053
Non-U.S. Government Securities [Member] | Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Non-U.S. Government Securities [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	7,053
Non-U.S. Government Securities [Member] | Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Short-term investments	0	0
Common stock of non-U.S. corporations [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Other long-term investments	79,089	0
Common stock of non-U.S. corporations [Member] | Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Other long-term investments	0	0
Common stock of non-U.S. corporations [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Other long-term investments	79,089	0
Common stock of non-U.S. corporations [Member] | Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Other long-term investments	0	0
Non-U.S. Certificates of Deposit [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	156	0
Non-U.S. Certificates of Deposit [Member] | Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Non-U.S. Certificates of Deposit [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	156	0
Non-U.S. Certificates of Deposit [Member] | Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	4,455	40,031
Money Market Funds [Member] | Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	4,455	40,031
Money Market Funds [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Money Market Funds [Member] | Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	$0	$0

Intangible_Assets_Components_o

Intangible Assets (Components of intangible assets, net) (Details) (USD $)	Dec. 28, 2014	Jun. 29, 2014
In Thousands, unless otherwise specified
Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$454,306	$445,571
Finite-lived intangible assets, accumulated amortization	-206,261	-188,828
Finite-lived intangible assets, net	248,045	256,743
Trade names, indefinite-lived	79,680	79,680
Intangible Assets, Gross (Excluding Goodwill)	533,986	525,251
Intangible assets, net	327,725	336,423
Customer Relationships [Member]
Intangible Assets [Line Items]
Finite-lived intangible assets, gross	137,440	137,440
Finite-lived intangible assets, accumulated amortization	-69,659	-66,970
Finite-lived intangible assets, net	67,781	70,470
Developed Technology [Member]
Intangible Assets [Line Items]
Finite-lived intangible assets, gross	162,760	162,760
Finite-lived intangible assets, accumulated amortization	-82,242	-72,921
Finite-lived intangible assets, net	80,518	89,839
Non-compete Agreements [Member]
Intangible Assets [Line Items]
Finite-lived intangible assets, gross	10,244	10,244
Finite-lived intangible assets, accumulated amortization	-6,977	-5,997
Finite-lived intangible assets, net	3,267	4,247
Trade Names, finite-lived [Member]
Intangible Assets [Line Items]
Finite-lived intangible assets, gross	520	520
Finite-lived intangible assets, accumulated amortization	-520	-516
Finite-lived intangible assets, net	0	4
Patent and Licensing Rights [Member]
Intangible Assets [Line Items]
Finite-lived intangible assets, gross	143,342	134,607
Finite-lived intangible assets, accumulated amortization	-46,863	-42,424
Finite-lived intangible assets, net	$96,479	$92,183

Intangible_Assets_Intangible_A

Intangible Assets Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 28, 2014	Dec. 29, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of Intangible Assets	$9	$9.40	$17.90	$18.80

Intangible_Assets_Intangible_A1

Intangible Assets Intangible Assets (Schedule of future amortization expense of finite-lived intangible assets) (Details) (USD $)	Dec. 28, 2014	Jun. 29, 2014
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]
June 28, 2015 (remainder of fiscal 2015)	$17,562
26-Jun-16	34,921
25-Jun-17	32,910
24-Jun-18	31,718
30-Jun-19	19,150
Thereafter	111,784
Finite-lived intangible assets, net	$248,045	$256,743

Longterm_Debt_Details

Long-term Debt (Details) (USD $)	3 Months Ended	6 Months Ended
	Dec. 28, 2014	Dec. 28, 2014	Jun. 29, 2014	Jan. 09, 2015
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$150,000,000	$150,000,000
Long-term debt	150,000,000	150,000,000	0
Line of Credit Facility, Remaining Borrowing Capacity	0	0
Long-term Debt, Average Interest Rate	0.86%	0.86%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.08%	0.08%
New Credit Agreement [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity				$500,000,000

Shareholders_Equity_Narrative_

Shareholders' Equity (Narrative) (Details) (June 28, 2015 Expiration [Member], Common Stock [Member], USD $)	6 Months Ended
In Millions, unless otherwise specified	Dec. 28, 2014
June 28, 2015 Expiration [Member] | Common Stock [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount	$550
Repurchased share number	9.3
Repurchased share value	$320.30

Earnings_Per_Share_Basic_Earni

Earnings Per Share (Basic Earnings Per Share Computation) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 28, 2014	Dec. 29, 2013
Earnings Per Share, Basic [Abstract]
Net income	$12,151	$35,681	$23,281	$66,178
Weighted average common shares - basic	115,264	120,932	117,435	120,248
Basic earnings per share	$0.11	$0.30	$0.20	$0.55

Earnings_Per_Share_Diluted_Ear

Earnings Per Share (Diluted Earnings Per Share Computation) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 28, 2014	Dec. 29, 2013
Earnings Per Share, Diluted [Abstract]
Net income	$12,151	$35,681	$23,281	$66,178
Weighted average common shares - basic	115,264	120,932	117,435	120,248
Dilutive effect of stock options, nonvested shares and Employee Stock Purchase Plan purchase rights	581	2,272	1,164	2,573
Weighted average common shares - diluted	115,845	123,204	118,599	122,821
Diluted earnings per share	$0.10	$0.29	$0.20	$0.54

Earnings_Per_Share_Narrative_D

Earnings Per Share (Narrative) (Details) (Common Stock [Member])	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 28, 2014	Dec. 29, 2013
Common Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive potential common shares excluded from diluted earnings per share calculation	8.6	3.1	6.5	2.1

StockBased_Compensation_Narrat

Stock-Based Compensation (Narrative) (Details)	6 Months Ended
	Dec. 28, 2014
	plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity-based compensation plans	1
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum contribution of employee's compensation, percentage	15.00%
Number of opportunities to purchase common stock at discount, per year	2
Employee Stock Purchase Plan Prior to Second Quarter Fiscal 2012 Amendment [Member] | Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock plan purchase discount at purchase date	15.00%
Employee Stock Purchase Plan After Second Quarter Fiscal 2012 Amendment [Member] | Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock plan purchase discount at beginning of participation period or purchase date	15.00%

StockBased_Compensation_Summar

Stock-Based Compensation (Summary of Outstanding Option Awards) (Details) (Stock Option [Member], USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 28, 2014
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding number of shares at beginning of period	8,922
Granted, number of shares	3,294
Exercised, number of shares	-477
Forfeited or expired, number of shares	-362
Outstanding number of shares at end of period	11,377
Outstanding weighted-average exercise price at beginning of period	$41.85
Granted, weighted-average exercise price	$44.93
Exercised, weighted-average exercise price	$29.15
Forfeited or expired, weighted-average exercise price	$47.99
Outstanding weighted-average exercised price at end of period	$43.08

StockBased_Compensation_Summar1

Stock-Based Compensation (Summary of Nonvested Shares of Restricted Stock and Stock Unit Awards Outstanding) (Details) (Restricted Stock Awards And Restricted Stock Units [Member], USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 28, 2014
Restricted Stock Awards And Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested, Number of RSAs/RSUs at beginning of period	860
Granted, Number of RSAs/RSUs	433
Vested, number of RSAs/RSUs	-347
Forfeited, number of RSAs/RSUs	-38
Nonvested, Number of RSAs/RSUs at end of period	908
Nonvested, weighted-average grant-date fair value at beginning of period	$46.81
Granted, weighted-average grant-date fair value	$44.94
Vested, weighted-average grant-date fair value	$46.15
Forfeited, weighted-average grant-date fair value	$48.62
Nonvested, weighted-average grant-date fair value at end of period	$46.09

StockBased_Compensation_Total_

Stock-Based Compensation (Total Stock-Based Compensation Expense) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 28, 2014	Dec. 29, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$16,436	$15,672	$33,196	$30,250
Cost of revenue, net [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	3,448	2,849	6,353	5,228
Research and development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	4,112	3,829	8,583	7,541
Selling, general and administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$8,876	$8,994	$18,260	$17,481

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended
In Millions, unless otherwise specified	Dec. 28, 2014	Dec. 28, 2014	Jun. 29, 2014
Income Tax Disclosure [Abstract]
U.S. statutory tax rate		35.00%
Income Tax Benefit, Research and Development, Amount	$1.90
Unrecognized tax benefits balance	18.2	18.2	18.4
Unrecognized Tax Benefits, Period Increase (Decrease)		0.2
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$18.20	$18.20

Commitments_and_Contingencies_1

Commitments and Contingencies (Warranties) (Details) (USD $)	6 Months Ended
	Dec. 28, 2014
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Warranty accrual, beginning balance	$6,822,000
Warranties accrued in current period	4,086,000
Expenditures	-3,086,000
Warranty accrual, ending balance	7,822,000
Product Warranty Liability, Long-Term	$900,000
Minimum [Member]
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Product Warranty, Range Period	90 days
Maximum [Member]
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Product Warranty, Range Period	10 years

Reportable_Segments_Revenues_G

Reportable Segments (Revenues, Gross Profit and Gross Margin, by Segment) (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 28, 2014	Dec. 29, 2013
Segment Reporting Information [Line Items]
Revenue, net	$413,157	$415,086	$840,829	$806,092
Gross profit	136,779	155,778	272,599	306,535
Gross Margin	33.10%	37.50%	32.40%	38.00%
LED Products [Member]
Segment Reporting Information [Line Items]
Revenue, net	151,877	215,022	325,467	433,045
Gross profit	59,424	97,644	127,048	199,297
Gross Margin	39.10%	45.40%	39.00%	46.00%
Lighting Products [Member]
Segment Reporting Information [Line Items]
Revenue, net	230,168	173,656	453,254	321,574
Gross profit	64,701	48,426	120,293	88,244
Gross Margin	28.10%	27.90%	26.50%	27.40%
Power and RF Products [Member]
Segment Reporting Information [Line Items]
Revenue, net	31,112	26,408	62,108	51,473
Gross profit	17,260	15,321	35,117	28,777
Gross Margin	55.50%	58.00%	56.50%	55.90%
Total segment gross profit [Member]
Segment Reporting Information [Line Items]
Gross profit	141,385	161,391	282,458	316,318
Unallocated Costs [Member]
Segment Reporting Information [Line Items]
Gross profit	($4,606)	($5,613)	($9,859)	($9,783)

Reportable_Segments_Schedule_o

Reportable Segments Schedule of Inventory by Reportable Segment (Details) (USD $)	Dec. 28, 2014	Jun. 29, 2014
In Thousands, unless otherwise specified
Segment Reporting Information [Line Items]
Inventories	$332,548	$284,780
LED Products [Member]
Segment Reporting Information [Line Items]
Inventories	135,456	123,249
Lighting Products [Member]
Segment Reporting Information [Line Items]
Inventories	181,848	148,757
Power and RF Products [Member]
Segment Reporting Information [Line Items]
Inventories	10,190	8,019
Total segment inventories [Member]
Segment Reporting Information [Line Items]
Inventories	327,494	280,025
Unallocated inventories [Member]
Segment Reporting Information [Line Items]
Inventories	$5,054	$4,755

Subsequent_Event_Subsequent_Ev1

Subsequent Event Subsequent Event (Details) (USD $)	3 Months Ended	6 Months Ended	0 Months Ended
In Millions, unless otherwise specified	Dec. 28, 2014	Dec. 28, 2014	Jan. 09, 2015
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$150	$150
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.08%	0.08%
New Credit Agreement [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$500
Percent of equity interests in first-tier foreign subsidiaries used as collateral			65.00%
Default interest rate spread			2.00%
Numerator of ratio of consolidated funding indebtedness to EBITDA			3
Denominator of ratio of consolidated funding indebtedness to EBITDA			1
Numerator of ratio of consolidated EBITDA to interest expense			3
Denominator of ratio of consolidated EBITDA to interest expense			1
Minimum [Member] | New Credit Agreement [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.09%
Maximum [Member] | New Credit Agreement [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.20%
Federal Funds Effective Swap Rate [Member] | New Credit Agreement [Member]
Subsequent Event [Line Items]
Incremental basis points in base rate calculation			0.50%
Base Rate [Member] | Minimum [Member] | New Credit Agreement [Member]
Subsequent Event [Line Items]
Debt Instrument, Basis Spread on Variable Rate			0.00%
Base Rate [Member] | Maximum [Member] | New Credit Agreement [Member]
Subsequent Event [Line Items]
Debt Instrument, Basis Spread on Variable Rate			0.50%
London Interbank Offered Rate (LIBOR) [Member] | New Credit Agreement [Member]
Subsequent Event [Line Items]
Incremental basis points in base rate calculation			1.00%
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | New Credit Agreement [Member]
Subsequent Event [Line Items]
Debt Instrument, Basis Spread on Variable Rate			0.80%
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | New Credit Agreement [Member]
Subsequent Event [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.50%