Marvell Technology 10-Q 21 Jul 16 2015 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares shares in Millions	6 Months Ended
	Aug. 01, 2015	Jul. 11, 2016
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Aug. 1, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
Trading Symbol	MRVL
Entity Registrant Name	MARVELL TECHNOLOGY GROUP LTD
Entity Central Index Key	1,058,057
Current Fiscal Year End Date	--01-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		511.2

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Current assets:
Cash and cash equivalents	$ 927,530	$ 1,210,977
Short-term investments	1,410,117	1,318,578
Accounts receivable, net	417,721	420,955
Inventories	327,103	308,162
Prepaid expenses and other current assets	68,883	68,140
Deferred income taxes	17,223	17,228
Total current assets	3,168,577	3,344,040
Property and equipment, net	322,262	340,639
Long-term investments	10,123	10,226
Goodwill	2,029,945	2,029,945
Acquired intangible assets, net	24,592	30,698
Other non-current assets	110,457	128,839
Total assets	5,665,956	5,884,387
Current liabilities:
Accounts payable	289,023	282,899
Accrued liabilities	160,969	131,388
Carnegie Mellon University accrued litigation settlement	733,557
Accrued employee compensation	126,038	154,969
Deferred income	59,652	68,120
Total current liabilities	1,369,239	637,376
Non-current income taxes payable	55,283	68,729
Other non-current liabilities	27,437	32,193
Total liabilities	1,451,959	738,298
Commitments and contingencies (Note 10)
Shareholders' equity:
Common shares	1,015	1,030
Additional paid-in capital	2,989,011	3,099,548
Accumulated other comprehensive income (loss)	(1,278)	308
Retained earnings	1,225,249	2,045,203
Total shareholders' equity	4,213,997	5,146,089
Total liabilities and shareholders' equity	$ 5,665,956	$ 5,884,387

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Aug. 01, 2015	Jan. 31, 2015
Common shares, par value	$ 0.002	$ 0.002

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Net revenue	$ 710,492	$ 961,545	$ 1,434,780	$ 1,919,375
Operating costs and expenses:
Cost of goods sold	461,719	477,741	812,872	971,601
Research and development	285,641	294,352	565,755	585,033
Selling and marketing	30,841	33,997	67,015	72,307
General and administrative	35,243	30,962	75,678	61,177
Carnegie Mellon University litigation settlement	654,667		654,667
Restructuring and other related charges	13,000	735	13,592	5,823
Amortization and write-off of acquired intangible assets	2,568	3,304	5,136	9,993
Total operating costs and expenses	1,483,679	841,091	2,194,715	1,705,934
Operating income (loss)	(773,187)	120,454	(759,935)	213,441
Interest and other income, net	6,790	12,263	11,957	14,188
Income (loss) before income taxes	(766,397)	132,717	(747,978)	227,629
Provision (benefit) for income taxes	5,543	(6,153)	9,872	(10,720)
Net income (loss)	$ (771,940)	$ 138,870	$ (757,850)	$ 238,349
Net income (loss) per share:
Basic	$ (1.49)	$ 0.27	$ (1.47)	$ 0.47
Diluted	$ (1.49)	$ 0.27	$ (1.47)	$ 0.46
Weighted average shares:
Basic	516,368	511,821	516,298	508,463
Diluted	516,368	520,269	516,298	520,510
Cash dividend declared per share	$ 0.06	$ 0.06	$ 0.12	$ 0.12

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Net income (loss)	$ (771,940)	$ 138,870	$ (757,850)	$ 238,349
Other comprehensive income (loss), net of tax:
Net change in unrealized gain (loss) on marketable securities	(1,458)	(221)	(3,318)	157
Net change in unrealized gain (loss) on auction rate securities	12	(34)	(103)	143
Net change in unrealized gain (loss) on cash flow hedges	88	473	1,835	(270)
Other comprehensive income (loss), net of tax	(1,358)	218	(1,586)	30
Comprehensive income (loss), net of tax	$ (773,298)	$ 139,088	$ (759,436)	$ 238,379

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014
Cash flows from operating activities:
Net income (loss)	$ (757,850)	$ 238,349
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	51,811	53,269
Share-based compensation	69,895	64,989
Amortization and write-off of acquired intangible assets	6,106	10,963
Non-cash restructuring and related charges	1,473	17
Other non-cash expense (income), net	1,721	(6,143)
Excess tax benefits from share-based compensation	(25)	(76)
Changes in assets and liabilities:
Accounts receivable	3,234	(30,159)
Inventories	(18,415)	(46,299)
Prepaid expenses and other assets	11,328	(27,157)
Accounts payable	11,958	87,686
Accrued liabilities and other non-current liabilities	8,058	2,962
Carnegie Mellon University accrued litigation settlement	733,557
Accrued employee compensation	(28,931)	22,550
Deferred income	(8,468)	21,140
Net cash provided by operating activities	85,452	392,091
Cash flows from investing activities:
Purchases of available-for-sale securities	(566,365)	(335,770)
Sales and maturities of available-for-sale securities	469,790	372,410
Distribution from (investments in) privately-held companies	208	(441)
Purchases of technology licenses	(5,677)	(9,409)
Purchases of property and equipment	(24,320)	(31,954)
Purchase of equipment previously leased	(10,240)
Net cash used in investing activities	(136,604)	(5,164)
Cash flows from financing activities:
Repurchase of common stock	(195,584)
Proceeds from employee stock plans	57,174	68,374
Minimum tax withholding paid on behalf of employees for net share settlement	(23,007)	(24,923)
Dividend payments to shareholders	(62,104)	(60,992)
Payments on technology license obligations	(8,799)	(2,677)
Excess tax benefits from share-based compensation	25	76
Net cash used in financing activities	(232,295)	(20,142)
Net increase (decrease) in cash and cash equivalents	(283,447)	366,785
Cash and cash equivalents at beginning of period	1,210,977	965,750
Cash and cash equivalents at end of period	$ 927,530	$ 1,332,535

The Company and Basis of Presen

The Company and Basis of Presentation	6 Months Ended
	Aug. 01, 2015
The Company and Basis of Presentation	Note 1. The Company and Basis of Presentation The Company Marvell Technology Group Ltd., a Bermuda company, and its subsidiaries (the “Company”), is a fabless semiconductor provider of high-performance application-specific standard products. The Company’s core strength of expertise is the development of complex System-on-a-Chip and System-in-a-Package devices, leveraging its extensive technology portfolio of intellectual property in the areas of analog, mixed-signal, digital signal processing, and embedded and stand alone integrated circuits. The majority of the Company’s product portfolio leverages embedded central processing unit technology. The Company also develops platforms that it defines as integrated hardware along with software that incorporates digital computing technologies designed and configured to provide an optimized computing solution. The Company’s broad product portfolio includes devices for data storage, enterprise-class Ethernet data switching, Ethernet physical-layer transceivers, wireless connectivity, Internet-of-Things devices and multimedia solutions. Basis of Presentation The Company’s fiscal year is the 52- or 53-week period ending on the Saturday closest to January 31. In a 52-week year, each fiscal quarter consists of 13 weeks. The additional week in a 53-week year is added to the fourth quarter, making such quarter consist of 14 weeks. Fiscal 2016 and 2015 each have a 52-week period. The unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for annual financial statements. In the opinion of management, all adjustments consisting of normal and recurring entries considered necessary for a fair statement of the results for the interim periods have been included in the Company’s unaudited condensed consolidated balance sheet as of August 1, 2015, the results of its operations for the three and six months ended August 1, 2015 and August 2, 2014, its comprehensive income for the three and six months ended August 1, 2015 and August 2, 2014, and its cash flows for the six months ended August 1, 2015 and August 2, 2014. The January 31, 2015 condensed consolidated balance sheet data was derived from the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended January 31, 2015, but does not include all disclosures required for annual periods. These condensed consolidated financial statements and related notes are unaudited and should be read in conjunction with the Company’s audited financial statements and related notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended January 31, 2015 as filed on March 26, 2015 with the Securities and Exchange Commission. The results of operations for the three and six months ended August 1, 2015 are not necessarily indicative of the results that may be expected for any other interim period or for the full fiscal year. Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, the Company evaluates its estimates, including those related to performance-based compensation, revenue recognition, provisions for sales returns and allowances, inventory excess and obsolescence, investment fair values, goodwill and other intangible assets, restructuring, income taxes, litigation and other contingencies. In addition, the Company uses assumptions when employing the Monte Carlo simulation and Black-Scholes valuation models to calculate the fair value of share-based awards that are granted. Actual results could differ from these estimates, and such differences could affect the results of operations reported in future periods. Principles of Consolidation The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated. The functional currency of the Company and its subsidiaries is the U.S. dollar.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	6 Months Ended
	Aug. 01, 2015
Recent Accounting Pronouncements	Note 2. Recent Accounting Pronouncements Accounting Pronouncements Recently Adopted In April 2014, the Financial Accounting Standards Board (“FASB”) issued an amendment to its guidance regarding the reporting requirements of discontinued operations, which was effective for the Company beginning in the first quarter of fiscal 2016. Under the amended guidance, a discontinued operation is defined as a disposal of a component or group of components that is disposed of or is classified as held for sale and represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results. As a result, the Company has adopted and will apply the new guidance for any future dispositions that meet the criteria of a discontinued operation under the amendment. In November 2015, the FASB issued a new standard to simplify the presentation of deferred income taxes. Currently, deferred income tax assets and liabilities are separately presented as current and non-current amounts on the consolidated balance sheet. The new standard will require that deferred tax assets and liabilities be classified and presented on the balance sheet as non-current. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016, although early adoption is permitted. The Company will adopt the new guidance at the beginning of its fourth quarter of fiscal 2016 on a prospective basis, and will not retrospectively adjust any prior periods. Adoption will have no impact on the Company’s consolidated results of operations and it had no material impact on working capital. Accounting Pronouncements Not Yet Effective In May 2014, the FASB issued a new standard on the recognition of revenue from contracts with customers, which will supersede nearly all existing revenue recognition guidance under GAAP. Under the new standard, recognition of revenue occurs when a customer obtains control of promised goods or services in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Additional disclosures regarding the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, and assets recognized from costs incurred to obtain or fulfill a contract will also be required. The FASB subsequently issued an update to this standard in August 2015, which provides deferral of the effective date by one year. The standard is now effective for the Company’s first quarter of fiscal 2019 and allows for either full retrospective or modified retrospective adoption. Early adoption is permitted only as of annual reporting periods beginning after December 15, 2016 and including interim reporting periods within such reporting period. The FASB has since issued additional updates of its new standard on revenue recognition issued in May 2014. In March 2016, an amendment was issued to clarify the implementation guidance on principal versus agent consideration. The guidance requires entities to determine whether the nature of its promise to provide goods or services to a customer is performed in a principal or agent capacity and to recognize revenue in a gross or net manner based on its principal/agent designation. In April 2016, amendments were issued to clarify the identification of performance obligations and the licensing implementation guidance in the initial standard. Amendments were issued in May 2016 related to its guidance on assessing collectability, presentation of sales tax, noncash consideration, and completed contracts and contract modification at transition, which reduce the potential for diversity in practice, and the cost and complexity of application at transition and on an ongoing basis. The Company has been evaluating the effects of the new guidance and has not yet selected a transition method nor has it determined the potential effects of adoption on its consolidated financial statements. In April 2015, the FASB issued new guidance to help entities evaluate the accounting for fees paid by a customer in a cloud computing arrangement. The guidance provides a basis for evaluating whether a cloud computing arrangement includes a software license or whether the arrangement should be accounted for as a service contract. The guidance is effective for annual and interim reporting periods beginning after December 15, 2015. The newly issued guidance also strikes from previous authoritative guidance, the use by analogy to the accounting for capital leases, which the Company applied in the accounting for certain of its technology license agreements. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In July 2015, the FASB issued an amendment to its guidance regarding the subsequent measurement of inventory. Currently, inventory is measured at the lower of cost or market. Market could be replacement cost, net realizable value or net realizable value less an approximately normal profit margin. Under this amended guidance, inventory is to be measured at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. This amendment applies to inventories for which cost is determined by methods other than last-in first-out and the retail inventory method. This standard is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In January 2016, the FASB issued new guidance which requires entities to measure all investments in equity securities at fair value with changes recognized through net income. This requirement does not apply to investments that qualify for the equity method of accounting, investments that result in consolidation of the investee, or investments for which the entity meets a practicability exception to fair value measurement. The new guidance also changes certain disclosure requirements for financial instruments. This standard is effective for annual and interim reporting periods beginning after December 15, 2017. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In March 2016, the FASB issued an amendment to its guidance on the effects of derivative contract novations on existing hedge accounting relationships. The new guidance clarifies that a change in the counterparty to a designated hedging instrument, in and of itself, does not require the de-designation of that hedging relationship, provided that all other hedge accounting criteria continue to be met. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In March 2016, the FASB issued a new standard on the accounting for leases, which requires a lessee to record a right-of-use asset and a corresponding lease liability on the balance sheet for all leases with terms longer than twelve months. The standard also expands the required quantitative and qualitative disclosures surrounding lease arrangements. The standard is effective for annual and interim reporting periods beginning after December 15, 2018. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In March 2016, the FASB issued an amendment to its guidance for investments that eliminates the requirement to retrospectively apply the equity method in previous periods when an investor initially obtains significant influence over an investee. Under the amended guidance, the investor should apply the equity method prospectively from the date the investment qualifies for the equity method. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In March 2016, the FASB issued new guidance which simplifies several aspects of the accounting for share-based payment award transactions, including the accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In June 2016, the FASB issued a new standard requiring financial assets measured at amortized cost be presented at the net amount expected to be collected, through an allowance for credit losses that is deducted from the amortized cost basis. The standard eliminates the probable initial recognition in current GAAP and reflects an entity’s current estimate of all expected credit losses. The measurement of expected credit losses is based upon historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the financial assets. The standard is effective for annual and interim reporting periods beginning after December 15, 2019. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

Investments

Investments	6 Months Ended
	Aug. 01, 2015
Investments	Note 3. Investments The following tables summarize the Company’s investments (in thousands): August 1, 2015 Amortized Gross Gross Estimated Short-term investments: Available-for-sale: Corporate debt securities $ 1,024,112 $ 1,643 $ (1,557 ) $ 1,024,198 U.S. government and agency debt 229,731 176 (19 ) 229,888 Asset backed securities 101,216 99 (12 ) 101,303 Foreign government and agency debt 16,945 7 (10 ) 16,942 Municipal debt securities 37,780 38 (32 ) 37,786 Total short-term investments 1,409,784 1,963 (1,630 ) 1,410,117 Long-term investments: Available-for-sale: Auction rate securities 12,500 — (2,377 ) 10,123 Total long-term investments 12,500 — (2,377 ) 10,123 Total investments $ 1,422,284 $ 1,963 $ (4,007 ) $ 1,420,240 January 31, 2015 Amortized Gross Gross Estimated Short-term investments: Available-for-sale: Corporate debt securities $ 983,008 $ 3,872 $ (563 ) $ 986,317 U.S. government and agency debt 178,898 265 (7 ) 179,156 Asset backed securities 91,432 108 (9 ) 91,531 Foreign government and agency debt 28,051 61 (2 ) 28,110 Municipal debt securities 33,421 47 (4 ) 33,464 Total short-term investments 1,314,810 4,353 (585 ) 1,318,578 Long-term investments: Available-for-sale: Auction rate securities 12,500 — (2,274 ) 10,226 Total long-term investments 12,500 — (2,274 ) 10,226 Total investments $ 1,327,310 $ 4,353 $ (2,859 ) $ 1,328,804 As of August 1, 2015, the Company’s investment portfolio included auction rate securities with an aggregate par value of $12.5 million classified as long-term investments. Although these securities have continued to pay interest, there is currently limited trading volume in the securities. The Company uses a discounted cash flow model to estimate the fair value of the auction rate securities based on estimated timing and amount of future interest and principal payments. In developing the discounted cash flow model, the Company considers the credit quality and liquidity of the underlying securities and related issuer, the collateralization of underlying security investments and other considerations. The fair value of these auction rate securities as of August 1, 2015 was $2.4 million less than their par value. Based on the Company’s balance of approximately $2.3 billion in cash, cash equivalents and short-term investments, and the fact that the Company continues to generate positive cash flow from operations on a quarterly basis, the Company does not anticipate having to sell these securities below par value and does not have the intent to sell these auction rate securities until recovery. Since the Company considers the impairment to be temporary, the Company recorded the unrealized loss to accumulated other comprehensive loss, a component of shareholders’ equity. Gross realized gains and gross realized losses on sales of available-for-sale securities are presented in the following tables (in thousands): Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Gross realized gains $ 255 $ 480 $ 698 $ 952 Gross realized losses (230 ) — (337 ) (25 ) Total net realized gains $ 25 $ 480 $ 361 $ 927 The contractual maturities of available-for-sale securities are presented in the following tables (in thousands): August 1, 2015 January 31, 2015 Amortized Estimated Amortized Estimated Due in one year or less $ 332,385 $ 332,406 $ 361,108 $ 361,396 Due between one and five years 1,068,461 1,068,779 950,702 954,151 Due over five years 21,438 19,055 15,500 13,257 $ 1,422,284 $ 1,420,240 $ 1,327,310 $ 1,328,804 For individual securities that have been in a continuous unrealized loss position, the fair value and gross unrealized loss for these securities aggregated by investment category and length of time in an unrealized position are presented in the following tables (in thousands): August 1, 2015 Less than 12 months 12 months or more Total Fair Value Unrealized Fair Unrealized Fair Value Unrealized Corporate debt securities $ 490,575 $ (1,539 ) $ 6,053 $ (18 ) $ 496,628 $ (1,557 ) U.S. government and agency debt 64,067 (19 ) — — 64,067 (19 ) Asset backed securities 30,602 (12 ) — — 30,602 (12 ) Foreign government and agency debt 13,938 (10 ) — — 13,938 (10 ) Municipal debt securities 10,532 (32 ) — — 10,532 (32 ) Auction rate securities — — 10,123 (2,377 ) 10,123 (2,377 ) Total securities $ 609,714 $ (1,612 ) $ 16,176 $ (2,395 ) $ 625,890 $ (4,007 ) January 31, 2015 Less than 12 months 12 months or more Total Fair Value Unrealized Fair Unrealized Fair Value Unrealized Corporate debt securities $ 243,699 $ (558 ) $ 2,005 $ (5 ) $ 245,704 $ (563 ) U.S. government and agency debt 32,165 (7 ) — — 32,165 (7 ) Asset backed securities 25,053 (9 ) — — 25,053 (9 ) Foreign government and agency debt 2,999 (2 ) — — 2,999 (2 ) Municipal debt securities 2,845 (4 ) — — 2,845 (4 ) Auction rate securities — — 10,226 (2,274 ) 10,226 (2,274 ) Total securities $ 306,761 $ (580 ) $ 12,231 $ (2,279 ) $ 318,992 $ (2,859 )

Supplemental Financial Informat

Supplemental Financial Information	6 Months Ended
	Aug. 01, 2015
Supplemental Financial Information	Note 4. Supplemental Financial Information (in thousands) Consolidated Balance Sheets August 1, January 31, Inventories: Work-in-process $ 198,158 $ 183,869 Finished goods 128,945 124,293 Total inventories $ 327,103 $ 308,162 August 1, January 31, Property and equipment, net: Machinery and equipment $ 623,191 $ 601,961 Buildings 144,320 144,320 Computer software 102,801 99,312 Land 53,373 53,373 Building improvements 49,902 49,753 Leasehold improvements 50,350 51,434 Furniture and fixtures 27,531 27,883 Construction in progress 4,680 6,167 1,056,148 1,034,203 Less: Accumulated depreciation and amortization (733,886 ) (693,564 ) Total property and equipment, net $ 322,262 $ 340,639 August 1, January 31, Other non-current assets: Technology and other licenses $ 48,518 $ 61,217 Deferred tax assets 19,288 22,273 Investments in privately-held companies 8,556 9,267 Prepaid land use rights 13,277 13,432 Deposits 7,649 7,903 Other 13,169 14,747 Total other non-current assets $ 110,457 $ 128,839 August 1, January 31, Accrued liabilities: Accrued rebates $ 35,826 $ 39,105 Accrued royalties 19,130 24,680 Accrued share repurchases 19,672 — Technology license obligations 10,802 14,428 Accrued legal expense 5,460 8,327 Accrued litigation 11,238 1,700 Other 58,841 43,148 Total accrued liabilities $ 160,969 $ 131,388 Accrued share repurchases represent amounts not yet paid by the Company for repurchases of its common shares made in the final three days of the fiscal quarter. The repurchased shares are retired immediately after the repurchases are completed. August 1, January 31, Other non-current liabilities: Technology license obligations $ 12,767 $ 16,468 Long-term accrued employee compensation 6,323 4,610 Other 8,347 11,115 Other non-current liabilities $ 27,437 $ 32,193 Accumulated other comprehensive income (loss) The changes in accumulated other comprehensive income (loss) by components are presented in the following tables (in thousands): Unrealized Gain Unrealized Gain Unrealized Gain Total Balance at January 31, 2015 $ 3,768 $ (2,274 ) $ (1,186 ) $ 308 Other comprehensive income (loss) before reclassifications (2,865 ) (103 ) 1,166 (1,802 ) Amounts reclassified from accumulated other comprehensive income (loss) (453 ) — 669 216 Other comprehensive income (loss), net of tax (3,318 ) (103 ) 1,835 (1,586 ) Balance at August 1, 2015 $ 450 $ (2,377 ) $ 649 $ (1,278 ) Unrealized Gain Unrealized Gain Unrealized Gain Total Balance at February 1, 2014 $ 2,534 $ (2,871 ) $ 934 $ 597 Other comprehensive income before reclassifications 1,012 143 734 1,889 Amounts reclassified from accumulated other comprehensive income (loss) (855 ) — (1,004 ) (1,859 ) Other comprehensive income (loss), net of tax 157 143 (270 ) 30 Balance at August 2, 2014 $ 2,691 $ (2,728 ) $ 664 $ 627 The amounts reclassified from accumulated other comprehensive income (loss) by components are presented in the following table (in thousands): Three Months Ended Six Months Ended Affected Line Item in the August 1, August 2, August 1, August 2, Interest and other income, net: Available-for-sale securities: Marketable securities $ 121 $ 435 $ 453 $ 855 Operating cost and expenses: Cash flow hedges: Research and development 251 200 (613 ) 921 Selling and marketing 4 19 (63 ) 81 General and administrative 20 — 7 2 Total $ 396 $ 654 $ (216 ) $ 1,859 Consolidated Statements of Operations Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Interest and other income, net: Interest income $ 3,971 $ 2,315 $ 8,048 $ 4,924 Net realized gain on investments 25 480 361 927 Currency translation gain (loss) 3,494 339 3,901 (686 ) Other income (expense) (508 ) 9,438 59 9,657 Interest expense (192 ) (309 ) (412 ) (634 ) $ 6,790 $ 12,263 $ 11,957 $ 14,188 Net income (loss) per share The Company reports both basic net income (loss) per share, which is based on the weighted average number of common shares outstanding during the period, and diluted net income (loss) per share, which is based on the weighted average number of common shares outstanding and potentially dilutive common shares outstanding during the period. The computations of basic and diluted net income (loss) per share are presented in the following table (in thousands, except per share amounts): Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Numerator: Net income (loss) $ (771,940 ) $ 138,870 $ (757,850 ) $ 238,349 Denominator: Weighted average shares — basic 516,368 511,821 516,298 508,463 Effect of dilutive securities: Share-based awards — 8,448 — 12,047 Weighted average shares — diluted 516,368 520,269 516,298 520,510 Net income (loss) per share: Basic $ (1.49 ) $ 0.27 $ (1.47 ) $ 0.47 Diluted $ (1.49 ) $ 0.27 $ (1.47 ) $ 0.46 Potential dilutive securities include dilutive common shares from share-based awards attributable to the assumed exercise of stock options, restricted stock units and employee stock purchase plan shares using the treasury stock method. Under the treasury stock method, potential common shares outstanding are not included in the computation of diluted net income per share, if their effect is anti-dilutive. Anti-dilutive potential shares are presented in the following table (in thousands): Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Weighted average shares outstanding: Share-based awards 57,437 26,132 57,519 24,341 Anti-dilutive potential shares from share-based awards are excluded from the calculation of diluted earnings per share for the three and six months ended August 1, 2015 due to the net loss reported in those periods. Anti-dilutive potential shares from share-based awards are excluded from the calculation of diluted earnings per share for all other periods reported above because either their exercise price exceeded the average market price during the period or the share-based awards were determined to be anti-dilutive based on applying the treasury stock method.

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Aug. 01, 2015
Derivative Financial Instruments	Note 5. Derivative Financial Instruments The Company manages some of its foreign currency exchange rate risk through the purchase of foreign currency exchange contracts that hedge against the short-term effect of currency fluctuations. The Company’s policy is to enter into foreign currency forward contracts with maturities less than 12 months that mitigate the effect of rate fluctuations on certain local currency denominated operating expenses. All derivative instruments are recorded at fair value in either prepaid expenses and other current assets or accrued liabilities. The Company reports cash flows from derivative instruments in cash flows from operating activities. The Company uses quoted prices to value its derivative instruments. The notional amounts of outstanding forward contracts were as follows (in thousands): Buy Contracts August 1, 2015 January 31, 2015 Israeli shekel $ 18,749 $ 51,326 Cash Flow Hedges. Other Foreign Currency Forward Contracts. The fair value of foreign currency exchange contracts was not significant as of any period presented. The following table provides information about gains (losses) associated with the Company’s derivative financial instruments (in thousands): Amount of Gains (Losses) in Statement of Operations Three Months Ended Six Months Ended Location of Gains (Losses) August 1, August 2, August 1, August 2, Derivatives designated as cash flow hedges: Forward contracts: Research and development $ 415 $ 311 $ (576 ) $ 909 Selling and marketing 6 30 (71 ) 82 General and administrative 32 (3 ) 18 (1 ) $ 453 $ 338 $ (629 ) $ 990 The portion of gains (losses) excluded from the assessment of hedge effectiveness are included in interest and other income, net, and these amounts were not material in the three and six months ended August 1, 2015 and August 2, 2014. In addition, realized losses from forward contracts that are not designated as hedging instruments that are included in interest and other income, net, were not material in the three and six months ended August 1, 2015 and August 2, 2014. The Company also reports hedge ineffectiveness from derivative financial instruments in current earnings, which was not material in the three and six months ended August 1, 2015 and August 2, 2014. No cash flow hedges were terminated as a result of forecasted transactions that did not occur.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Aug. 01, 2015
Fair Value Measurements	Note 6. Fair Value Measurements Fair value is an exit price representing the amount that would be received in the sale of an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or a liability. As a basis for considering such assumptions, the accounting guidance establishes a three-tier value hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value: Level 1—Observable inputs that reflect quoted prices for identical assets or liabilities in active markets. Level 2—Other inputs that are directly or indirectly observable in the marketplace. Level 3—Unobservable inputs that are supported by little or no market activity. The fair value hierarchy also requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The Company’s Level 1 assets include institutional money-market funds that are classified as cash equivalents and marketable investments in U.S. government and agency debt, which are valued primarily using quoted market prices. The Company’s Level 2 assets include its marketable investments in time deposits, corporate debt securities, foreign government and agency debt, municipal debt securities and asset backed securities as the market inputs used to value these instruments consist of market yields, reported trades and broker/dealer quotes, which are corroborated with observable market data. In addition, forward contracts, and the severance pay fund are classified as Level 2 assets as the valuation inputs are based on quoted prices and market observable data of similar instruments. The Company’s investments in auction rate securities are classified as Level 3 assets because there are currently no active markets for the auction rate securities and consequently the Company is unable to obtain independent valuations from market sources. Therefore, the auction rate securities are valued using a discounted cash flow model. Some of the inputs to the discounted cash flow model are unobservable in the market. The Company’s Level 3 assets also include corporate equipment, which it acquired through an early buyout option under an operating lease (see “Note 8 – Restructuring and Other Related Charges”) since it is valued based on market prices of similar assets in a limited market. The total amount of assets measured using Level 3 valuation methodologies represented 0.2% of total assets as of August 1, 2015. The tables below set forth, by level, the Company’s assets and liabilities that are measured at fair value on a recurring basis. The tables do not include assets and liabilities that are measured at historical cost or any basis other than fair value (in thousands): August 1, 2015 Level 1 Level 2 Level 3 Total Assets Cash equivalents: Money market funds $ 14,819 $ — $ — $ 14,819 Time deposits — 204,358 — 204,358 Corporate debt securities — 20,675 — 20,675 Short-term investments: U.S. government and agency debt 229,888 — — 229,888 Corporate debt securities — 1,024,198 — 1,024,198 Asset backed securities — 101,303 — 101,303 Foreign government and agency debt — 16,942 — 16,942 Municipal debt securities — 37,786 — 37,786 Prepaid expenses and other current assets: Foreign currency forward contracts — 624 — 624 Long-term investments: Auction rate securities — — 10,123 10,123 Other non-current assets: Severance pay fund — 1,925 — 1,925 Total assets $ 244,707 $ 1,407,811 $ 10,123 $ 1,662,641 January 31, 2015 Level 1 Level 2 Level 3 Total Assets Cash equivalents: Money market funds $ 111,286 $ — $ — $ 111,286 Time deposits — 213,012 — 213,012 Corporate debt securities — 21,999 — 21,999 Short-term investments: U.S. government and agency debt 179,156 — — 179,156 Corporate debt securities — 986,317 — 986,317 Asset backed securities — 91,531 — 91,531 Foreign government and agency debt — 28,110 — 28,110 Municipal debt securities — 33,464 — 33,464 Prepaid expenses and other current assets: Foreign currency forward contracts — 124 — 124 Long-term investments: Auction rate securities — — 10,226 10,226 Other non-current assets: Severance pay fund — 1,758 — 1,758 Total assets $ 290,442 $ 1,376,315 $ 10,226 $ 1,676,983 Liabilities Accrued liabilities: Foreign currency forward contracts $ — $ 1,379 $ — $ 1,379 Assets measured and recorded at fair value on a non-recurring basis include corporate equipment classified as held for sale, which had a fair value of $9.3 million as of August 1, 2015 (see “Note 8 – Restructuring and Other Related Charges.” The following table summarizes the change in fair value for Level 3 assets (in thousands): Six Months Ended August 1, August 2, Beginning balance $ 10,226 $ 16,279 Sales and redemptions — (3,000 ) Unrealized losses included in accumulated other comprehensive income (103 ) 143 Ending balance $ 10,123 $ 13,422

Acquired Intangible Assets, Net

Acquired Intangible Assets, Net	6 Months Ended
	Aug. 01, 2015
Acquired Intangible Assets, Net	Note 7. Acquired Intangible Assets, Net The carrying amounts of acquired intangible assets, net, are as follows (in thousands): August 1, 2015 January 31, 2015 Range of Gross Accumulated Write-Offs Net Gross Accumulated Write-Offs Net Purchased and core technology 4 - 8 years $ 36,348 $ (19,303 ) $ 17,045 $ 36,348 $ (16,107 ) $ 20,241 Trade names 5 years 1,300 (958 ) 342 1,300 (828 ) 472 Customer intangibles 5 - 7 years 28,600 (21,395 ) 7,205 28,600 (18,615 ) 9,985 Total intangible assets, net $ 66,248 $ (41,656 ) $ 24,592 $ 66,248 $ (35,550 ) $ 30,698 Based on the identified intangible assets recorded at August 1, 2015, the future amortization expense for the next five fiscal years is as follows (in thousands): Fiscal Year Remainder of fiscal 2016 $ 6,106 2017 11,027 2018 5,599 2019 1,860 2020 and thereafter — $ 24,592

Restructuring and Other Related

Restructuring and Other Related Charges	6 Months Ended
	Aug. 01, 2015
Restructuring and Other Related Charges	Note 8. Restructuring and Other Related Charges The following table provides a summary of restructuring and other related charges as presented in the unaudited condensed consolidated statements of operations (in thousands): Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Restructuring and other related charges $ 13,000 $ 735 $ 13,592 $ 5,823 Write-off of acquired intangible assets — — — 3,386 $ 13,000 $ 735 $ 13,592 $ 9,209 The following table presents details of charges recorded by the Company related to the restructuring actions described below (in thousands): Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Severance and related costs $ 11,705 $ 418 $ 11,705 $ 5,035 Facilities and related costs 206 254 225 698 Other exit-related costs 189 63 189 73 12,100 735 12,119 5,806 Impairment and write-off of assets: Equipment 900 — 1,473 17 Acquired intangible asset — — — 3,386 $ 13,000 $ 735 $ 13,592 $ 9,209 In May 2015, the Company decided to further reduce its research and development operations in Israel and close certain other design centers, primarily located in Europe and the U.S. in connection with its ongoing effort to streamline its business. As a result, the Company recorded a $11.9 million charge that included severance related to the termination of 313 employees and the lease obligation related to a facility that the Company vacated in July 2015. Although the majority of the affected employees departed by the end of the second quarter of fiscal 2016, certain employees remained through the end of calendar 2015 to facilitate the transfer of ongoing operations to other major sites. Before the end of fiscal 2016, substantially all of the activities associated with these actions were completed and all affected employees had departed. In March 2015, the Company exercised the early buyout option under an operating lease for corporate equipment that it had planned to sell as part of a cost reduction action. The Company actively sought a buyer and classified the equipment as held for sale within prepaid and current assets on the unaudited condensed consolidated balance sheet. It also ceased depreciation on these assets and measured the carrying value at the lower of net book value or fair value (less cost to sell). Accordingly, since the fair value of the equipment was lower than its net book value as of August 1, 2015, the Company recorded an impairment charge of $0.9 million resulting in a carrying value of $9.3 million. This charge is included in the total restructuring charges for the three and six months ended August 1, 2015. Subsequently in October 2015, the Company sold the corporate equipment for net proceeds of $9.3 million, which approximated the carrying value and resulted in no gain or loss recognition in the third quarter of fiscal 2016 upon the sale of the asset. During the three and six months ended August 1, 2015, the Company also continued to make payments and incur ongoing operating expenses related to vacated facilities under previous restructure actions. In September 2015, the Company announced a significant restructuring of its mobile platform business in order to focus the mobile product line on more profitable opportunities and align its expenses with corporate targets. The Company began implementing actions to significantly downsize the mobile platform organization to refocus its technology to other emerging opportunities, but it will continue its commitment to wireless connectivity such as WiFi and other wireless standards. Major activities associated with these actions were expected to take place in the third quarter of fiscal 2016 through the end of the first quarter of fiscal 2017. The Company initially announced it expected to incur a total charge of $100 million to $130 million for severance and employee-related costs, facilities and asset impairment charges, and the write down of mobile-related inventory. The following table sets forth a reconciliation of the beginning and ending restructuring liability balances by each major type of costs associated with the restructuring charges (in thousands): Severance Facilities Other Exit-Related Total Balance at January 31, 2015 $ — $ 1,339 $ 3,230 $ 4,569 Restructuring charges 11,705 225 189 12,119 Net cash payments (2,392 ) (476 ) (3,419 ) (6,287 ) Exchange rate adjustment (104 ) (67 ) — (171 ) Balance at August 1, 2015 $ 9,209 $ 1,021 $ — $ 10,230 During the six months ended August 1, 2015, the Company paid severance and related costs to 218 employees who departed in the second quarter of fiscal 2016 as part of the recent actions to streamline its business. The remaining severance balance at August 1, 2015 was paid by the end of fiscal 2016. The balance at August 1, 2015 for facility and related costs includes remaining payments under lease obligations related to vacated space that are expected to be paid through fiscal 2018.

Income Tax

Income Tax	6 Months Ended
	Aug. 01, 2015
Income Tax	Note 9. Income Tax The income tax expense for the three months ended August 1, 2015 was primarily due to current income tax liability of $15.2 million and a $6.7 million provision to record a valuation allowance against certain deferred tax assets in a non-U.S. jurisdiction. These tax expenses for the three months ended August 1, 2015 were partially offset by a tax benefit of $11.7 million from a net reduction in unrecognized tax benefits, which primarily arose from the expiration of statutes of limitation and the settlement of audits in non-U.S. jurisdictions, and true-up adjustments of $4.8 million, primarily related to the filing of tax returns. The income tax expense for the six months ended August 1, 2015 was primarily due to current income tax liability of $19.5 million, a $6.7 million provision to record a valuation allowance against certain deferred tax assets in a non-U.S. jurisdiction and an additional provision of $3.1 million related to a $15.4 million payment to the Company’s former Chief Executive Officer (see “Note 13 – Related Party Transaction”). These tax expenses for the six months ended August 1, 2015 were partially offset by tax benefits of $14.8 million from a net reduction in unrecognized tax benefits, which primarily arose from the expiration of statutes of limitation and the settlement of tax audits in non-U.S. jurisdictions, and true-up adjustments of $4.8 million, primarily related to the filing of tax returns. The income tax benefit for the three months ended August 2, 2014 included the current income tax liability of $4.9 million, which was more than offset by tax benefits of $7.3 million from a net reduction in unrecognized tax benefits and $3.7 million from an increase in the net deferred tax assets because of a tax rate change in Singapore. The Company finalized its agreement with the Singapore Economic Development Board for the remaining portion of pre-tax income subject to the Development and Expansion Incentive, which was extended through June 2019. The net reduction in unrecognized tax benefits primarily arose from the release of the expiration of statutes of limitation in non-U.S. jurisdictions. The income tax benefit for the six months ended August 2, 2014 included the current income tax liability of $10.6 million which was offset by a net reduction in unrecognized tax benefits of $9.8 million and $11.5 million from an increase in the net deferred tax assets because of the tax rate change in Singapore. The net reduction in unrecognized tax benefits arose from the release of $13.2 million due to the expiration of statutes of limitation, which was reduced by a $3.4 million increase in current unrecognized tax benefit estimates in various non-U.S. jurisdictions. It is reasonably possible that the amount of unrecognized tax benefits could increase or decrease significantly due to changes in tax law in various jurisdictions, new tax audits and changes in the U.S. dollar as compared to foreign currencies within the next 12 months. Excluding these factors, uncertain tax positions may decrease by as much as $18.7 million from the lapse of statutes of limitation in various jurisdictions during the next 12 months. Government tax authorities from several non-U.S. jurisdictions are also examining returns. The Company believes that it has adequately provided for any reasonably foreseeable outcomes related to its tax audits and that any settlement will not have a material effect on its results at this time. The Company operates under tax incentives in certain countries, which may be extended if certain additional requirements are satisfied. The tax incentives are conditional upon meeting certain employment and investment thresholds. The impact of these tax incentives decreased foreign taxes by $1.6 million and $4.9 million for the three and six months ended August 1, 2015, respectively, and $7.1 million and $10.4 million for the three and six months ended August 2, 2014, respectively. The benefit of the tax incentives on net loss per share was less than $0.01 per share for the three months ended August 1, 2015 and $0.01 per share for the six months ended August 1, 2015, compared to a benefit on net income of $0.01 per share for the three months ended August 2, 2014 and $0.02 per share for the six months ended August 2, 2014. The Company’s principal source of liquidity as of August 1, 2015 consisted of approximately $2.3 billion of cash, cash equivalents and short-term investments, of which approximately $800 million was held by foreign subsidiaries (outside Bermuda). Approximately $550 million of this amount held by foreign subsidiaries is related to undistributed earnings, most of which have been indefinitely reinvested outside of Bermuda. These funds are primarily held in China, Israel, the United States and Switzerland. The Company plans to use such amounts to fund various activities outside of Bermuda including working capital requirements, capital expenditures for expansion, funding of future acquisitions or other financing activities. If such funds were needed by the parent company in Bermuda or if the amounts were otherwise no longer considered indefinitely reinvested, the Company would incur a tax expense of approximately $160 million.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Aug. 01, 2015
Commitments and Contingencies	Note 10. Commitments and Contingencies Purchase Commitments Under the Company’s manufacturing relationships with its foundry partners, cancellation of all outstanding purchase orders are allowed, but requires payment of all costs and expenses incurred through the date of cancellation. As of August 1, 2015, these foundries had incurred approximately $215.2 million of manufacturing costs and expenses relating to the Company’s outstanding purchase orders. Intellectual Property Indemnification The Company has agreed to indemnify certain customers for claims made against the Company’s products, where such claims allege infringement of third party intellectual property rights, including, but not limited to, patents, registered trademarks, and/or copyrights. Under the aforementioned indemnification clauses, the Company may be obligated to defend the customer and pay for the damages awarded against the customer under an infringement claim as well as the attorneys’ fees and costs. The Company’s indemnification obligations generally do not expire after termination or expiration of the agreement containing the indemnification obligation. Generally, there are limits on and exceptions to the Company’s potential liability for indemnification. Although historically the Company has not made significant payments under these indemnification obligations, the Company cannot estimate the amount of potential future payments, if any, that it might be required to make as a result of these agreements. The maximum potential amount of any future payments that the Company could be required to make under these indemnification obligations could be significant. Contingencies The Company and certain of its subsidiaries are currently parties to various legal proceedings, including those noted in this section. The legal proceedings and claims described below could result in substantial costs and could divert the attention and resources of the Company’s management. The Company is also engaged in other legal proceedings and claims not described below, which arise in the ordinary course of its business. Litigation is subject to inherent uncertainties and unfavorable rulings could occur. An unfavorable ruling in litigation could require the Company to pay damages, one-time license fees or ongoing royalty payments, and could prevent the Company from manufacturing or selling some of its products or limit or restrict the type of work that employees involved in such litigation may perform for the Company, any of which could adversely affect financial results in future periods. The Company believes that its products do not infringe valid and enforceable claims and it will continue to vigorously defend against the allegations in these matters. However, there can be no assurance that these matters will be resolved in a manner that is not adverse to the Company’s business, financial condition, results of operations or cash flows. As of August 1, 2015, the Company has an accrued litigation balance of $744.8 million related to certain legal proceedings described below. Unless otherwise stated, the Company is currently unable to predict the final outcome of these lawsuits and therefore cannot determine the likelihood of loss or estimate a range of possible loss. Carnegie Mellon University Litigation USEI Litigation On May 4, 2010, MSI filed a motion to intervene in the USEI litigation, which was granted on May 19, 2010. On July 13, 2010, the E.D. of Texas issued an order granting the defendants’ motion to transfer the action to the U.S. District Court for the Northern District of California (“N.D. of California”); the case was formally transferred on August 23, 2010. On September 14, 2011, USEI withdrew its allegations against MSI for the ‘459 patent. The N.D. of California issued a first claim construction ruling on January 31, 2012 and a supplemental claim construction ruling on August 29, 2012. On August 16, 2013, the N.D. of California granted defendants’ summary judgment motion to preclude the plaintiff from recovering certain pre-suit damages. On November 7, 2014, on summary judgment, the N.D. of California found that all the patents-in-suit were either invalid or not infringed. On December 1, 2014, the N.D. of California entered a judgment in favor of defendants and awarded defendants’ costs. On December 29, 2014, USEI filed a motion to alter or amend the N.D. of California’s summary judgment order, which the N.D. of California denied on March 31, 2015. On April 24, 2015, USEI filed its notice of appeal. On April 25, 2016, the Federal Circuit affirmed the N.D. of California’s judgment in favor of MSI. On June 29, 2016, the Federal Circuit denied USEI’s petition for rehearing. Azure Networks Litigation On January 13, 2015, Azure filed a second suit against MSI in the E.D. of Texas, alleging infringement of U.S. Patent Nos. 8,582,570; 8,582,571; 8,588,196; 8,588,231; 8,589,599; 8,675,590; 8,683,092; 8,700,815; 8,732,347; and 8,732,361, purportedly related to certain Wi-Fi and near field communication (“NFC”) technologies. The complaint seeks unspecified damages. On April 6, 2015, MSI filed an amended answer and counterclaims. The case was dismissed with prejudice on January 4, 2016 with no significant impact on the Company’s unaudited condensed consolidated financial statements. France Telecom Litigation Vantage Point Technology Patent Litigation Bandspeed Litigation. NXP Litigation. Paone Litigation. Innovatio Litigation Visual Memory Litigation Luna Litigation and Consolidated Cases On November 18, 2015, the S.D. of New York granted the Company’s motion to transfer the consolidated cases to the N.D. of California. On December 21, 2015, the N.D. of California granted the Company’s motion to deem the consolidated cases related to the Saratoga litigation, discussed below. On February 8, 2016, the N.D. of California granted an unopposed motion to appoint Plumbers and Pipefitters National Pension Fund as Lead Plaintiff. On March 19, 2016, Lead Plaintiff filed a consolidated amended complaint. On April 29, 2016, Marvell and each of the individual defendants each filed motions to dismiss; Lead Plaintiff’s oppositions were filed on June 10, 2016; and defendants’ replies are due by July 15, 2016. The hearing on the motions to dismiss is set for July 29, 2016. Saratoga Litigation On October 23, 2015, the Company removed the action to the N.D. of California. On December 21, 2015, the N.D. of California denied Saratoga’s motion to remand. On December 21, 2015, the N.D. of California granted the Company’s motion to deem the action related to the consolidated Luna actions, discussed above. On January 22, 2016, the Company filed a motion to dismiss the complaint; on February 19, 2016, Saratoga filed an opposition; and on March 4, 2016, the Company filed a reply. On March 25, 2016, the N.D. of California held a hearing on the motion and took the matter under submission. To the Company’s knowledge, none of the individual defendants has yet been served. Surety Bonds On May 14, 2014, the Company filed a Notice of Appeal to appeal the final judgment issued by the W.D. of Pennsylvania in the CMU litigation. In order to stay the execution of the final judgment pending its appeal, the Company filed a supersedeas bond for $1.54 billion with the W.D. of Pennsylvania in the event the Company did not fully satisfy a final judgment as affirmed after the completion of all appellate proceedings. The bond was issued by a consortium of sureties authorized by the U.S. Treasury. In support of the bond, the Company entered into separate indemnity agreements with each of the sureties to indemnify the sureties from all costs and payments made under the bond. The indemnity agreements did not require collateral to be posted at the time of the issuance of the bond. Therefore no cash is considered restricted as of the date of this filing. However, the indemnity agreements provide that each of the sureties have the right to demand to be placed in funds or call for collateral under pre-defined events. On November 14, 2014, the Company filed a second surety bond for $216 million and filed a commitment letter from the sureties to issue up to an additional $95 million in bonding under certain conditions. The second bond and commitment are secured by the Company’s campus located in Santa Clara, California, which has a carrying value of $136.2 million at August 1, 2015. In connection with the settlement that was reached with CMU for a total $750 million in February 2016, the primary supersedeas bond that the Company entered into was reduced to $439 million and the secondary bond was adjusted to $311 million and both were discharged pursuant to an order releasing supersedeas bonds on April 21, 2016. The underlying indemnity agreements will terminate upon the final dismissal of the case in the third quarter of fiscal 2017. For additional information, see CMU litigation under “Contingencies” above. Indemnities, Commitments and Guarantees During its normal course of business, the Company has made certain indemnities, commitments and guarantees under which it may be required to make payments in relation to certain transactions. These indemnities may include intellectual property indemnities to the Company’s customers in connection with the sales of its products, indemnities for liabilities associated with the infringement of other parties’ technology based upon the Company’s products, indemnities for general commercial obligations, indemnities to various lessors in connection with facility leases for certain claims arising from such facility or lease, and indemnities to directors and officers of the Company to the maximum extent permitted under the laws of Bermuda. In addition, the Company has contractual commitments to various customers, which could require the Company to incur costs to repair an epidemic defect with respect to its products outside of the normal warranty period if such defect were to occur. The duration of these indemnities, commitments and guarantees varies, and in certain cases, is indefinite. Some of these indemnities, commitments and guarantees do not provide for any limitation of the maximum potential future payments that the Company could be obligated to make. In general, the Company does not record any liability for these indemnities, commitments and guarantees in the accompanying consolidated balance sheets as the amounts cannot be reasonably estimated and are not considered probable. The Company does, however, accrue for losses for any known contingent liability, including those that may arise from indemnification provisions, when future payment is probable.

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Aug. 01, 2015
Shareholders' Equity	Note 11. Shareholders’ Equity Stock Plans Stock option activity under the Company’s stock option and stock incentive plans is included in the following table (in thousands, except per share amounts): Time-Based Options Market-Based Options Total Number of Weighted Exercise Price Number of Weighted Exercise Price Number of Weighted Average Exercise Price Balance at January 31, 2015 47,140 $ 13.79 2,232 $ 15.43 49,372 $ 13.88 Granted 5,872 $ 14.37 — $ — 5,872 $ 14.37 Exercised (1,829 ) $ 10.24 — $ — (1,829 ) $ 10.24 Canceled/Forfeited (3,718 ) $ 16.80 (8 ) $ 15.43 (3,726 ) $ 16.80 Balance at August 1, 2015 47,465 $ 13.77 2,224 $ 15.43 49,689 $ 13.84 Vested or expected to vest at August 1, 2015 44,264 $ 13.77 Exercisable at August 1, 2015 24,586 $ 14.44 For time-based stock options vested and expected to vest at August 1, 2015, the aggregate intrinsic value was $45.8 million and the weighted average remaining contractual term was 6.0 years. For time-based stock options exercisable at August 1, 2015, the aggregate intrinsic value was $30.6 million and the weighted average remaining contractual term was 4.2 years. The aggregate intrinsic value of stock options exercised during the three months ended August 1, 2015 and August 2, 2014 was $2.5 million and $4.2 million, respectively. The aggregate intrinsic value of stock options exercised during the six months ended August 1, 2015 and August 2, 2014 was $8.8 million and $13.6 million, respectively. There was no aggregate intrinsic value for market-based stock options at August 1, 2015 and the weighted average remaining contractual term of market-based stock options expected to reach the end of the vesting period at August 1, 2015 was 5.7 years. The Company’s closing stock price of $12.44 as reported on the NASDAQ Global Select Market for all in-the-money options as of July 31, 2015 was used to calculate the aggregate intrinsic value. As of August 1, 2015, the unamortized compensation expense for time-based stock options was $57.0 million and market-based stock options were fully amortized in fiscal 2015. The unamortized compensation expense for time-based stock options will be amortized on a straight-line basis and is expected to be recognized over a weighted average period of 2.4 years. Activity related to the non-vested portion of the restricted stock units is included in the following table (in thousands, except for share prices): Time-Based Performance-Based Market-Based Total Number of Weighted Grant Date Fair Value Number of Weighted Grant Date Fair Value Number of Weighted Grant Date Fair Value Number of Weighted Grant Date Fair Value Balance at January 31, 2015 9,748 $ 14.84 1,254 $ 14.99 11,002 $ 14.85 Granted 4,873 $ 13.66 669 $ 14.08 407 $ 12.24 5,949 $ 13.61 Vested (4,601 ) $ 15.30 (658 ) $ 15.15 — $ — (5,259 ) $ 15.28 Canceled/Forfeited (409 ) $ 14.06 (227 ) $ 14.43 (54 ) $ 12.24 (690 ) $ 13.09 Balance at August 1, 2015 9,611 $ 14.05 1,038 $ 14.42 353 $ 12.24 11,002 $ 14.03 In April 2015, the Company granted performance-based equity awards to each of its executive officers, which are based on their achievement of certain performance goals for a new performance period beginning in fiscal 2016. These equity awards include restricted stock units which vest based on the achievement of certain financial goals (each a “Financial Performance RSU”), and performance awards for which a portion shall vest based on the achievement of individual strategic objectives (each a “Strategic Objective Award”) and a portion shall vest based on total shareholder return (each a “Total Shareholder Return Award”). These awards are reported in the above table as “Performance-Based,” except for the Total Shareholder Return Award which is reported as “Market-Based.” The Financial Performance RSUs will be earned based on the achievement of revenue and modified non-GAAP operating income that have been established at “threshold,” “target” and “maximum” levels and will vest on the first anniversary of the commencement date. The Strategic Objective Awards will vest on the first anniversary of the vest commencement date at the target level based on the achievement of individual strategic goals and, with respect to a portion of each Strategic Objective Award, the further achievement of either the revenue or modified non-GAAP operating income objective established for the Financial Performance RSU. The Total Shareholder Return Awards will vest on the second anniversary of the commencement date based on the Company’s stock price performance in comparison to the Philadelphia Semiconductor Sector Index. Share-based compensation for the Total Shareholder Return Award is measured using the Monte Carlo valuation method since the award is indexed to the price of the Company’s common stock as set forth under the terms of the award. In connection with the performance-based equity awards granted in fiscal 2016 to each of the Company’s executive officers, a total of 33,616 shares vested on April 1, 2016 based on achieving certain individual strategic goals as evaluated by the Executive Compensation Committee of the Company’s Board of Directors. No shares vested for the achievement of financial performance goals since the financial performance criteria were below the threshold level. The amount of canceled shares reported in the table above includes the unvested shares that were not earned. In connection with the performance-based equity awards granted in fiscal 2015 to each of the Company’s executive officers, a total of 478,001 shares vested on April 1, 2015 in connection with the first performance period completed at the end of fiscal 2015. Of this amount, an additional 107,954 shares are included as granted in the table above for the six months ended August 1, 2015 since each executive officer achieved greater than their target shares for one of the financial performance goals. The amount of canceled shares reported in the table above includes the portion of unvested shares that were not earned since performance objectives for each executive officer’s other financial and strategic performance goals were not fully achieved. During the first quarter of fiscal 2016, the Company determined the performance goals established for the second performance period to be completed at the end of fiscal 2016 would not be achieved and adjusted the related share-based compensation expense accordingly. As of August 1, 2015, the Company determined it was still not probable these performance goals would be achieved. In connection with the performance-based restricted stock units granted in fiscal 2015 to certain members of senior management, final evaluation for each individual’s achievement of their performance was measured in the first quarter of fiscal 2016. As a result, a total of 360,723 shares vested on April 1, 2015 and are included in the above table. There was no material adjustment to share-based compensation expense related to these performance-based restricted stock units in fiscal 2016. The amount of canceled shares reported in the table above includes the portion of unvested shares that were not earned since certain performance achievements were not fully achieved. The Company recognizes expense from performance-based equity awards when it becomes probable that the performance conditions will be met. Once it becomes probable that a performance-based award will vest, the Company recognizes share-based compensation expense equal to the number of shares expected to vest multiplied by the fair value of the award at the grant date, which is amortized using the accelerated method. The aggregate intrinsic value of restricted stock units expected to vest as of August 1, 2015 was $126.1 million. The number of restricted stock units that are expected to vest is 10.1 million shares. As of August 1, 2015, unamortized compensation expense related to restricted stock units was $103.6 million. The unamortized compensation expense for restricted stock units will be amortized on a straight-line basis and is expected to be recognized over a weighted average period of 1.4 years. Employee Stock Purchase Plan During the three and six months ended August 1, 2015, a total of 3.2 million shares were issued at a weighted-average price of $11.88 per share under the 2000 Employee Stock Purchase Plan, as amended and restated (the “ESPP”). During the three and six months ended August 2, 2014, a total of 5.2 million shares were issued at a weighted-average price of $7.58 per share under the ESPP. As of August 1, 2015, there was $44.2 million of unrecognized compensation cost related to the ESPP. Share Repurchase Program The Company repurchased 14.6 million of its common shares for $193.2 million in cash during the three months ended August 1, 2015 and 16.0 million of its common shares for $215.3 million during the six months ended August 1, 2015. The Company had no repurchases of its common shares during the three and six months ended August 2, 2014. The repurchased shares are retired immediately after the repurchases are completed. The Company records all repurchases, as well as investment purchases and sales, based on their trade date. Approximately $19.7 million of repurchases for the six months ended August 2, 2015 were made in the final three days of the period and is included in accrued liabilities in the unaudited condensed consolidated balance sheet due to the standard three-day settlement period. As of August 1, 2015, a total of 237.9 million cumulative shares have been repurchased under the Company’s share repurchase program for a total $3.0 billion in cash and there was $228.2 million remaining available for future share repurchases. Subsequent to the end of the quarter through August 24, 2015, the Company repurchased an additional 3.7 million of its common shares for $45.6 million at an average price per share of $12.39. The Company has made no subsequent share repurchases since August 24, 2015. Dividends The Company paid the following cash dividends (in thousands, except per share amounts): Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Cash dividend per share $ 0.06 $ 0.06 $ 0.12 $ 0.12 Total payment to shareholders $ 31,194 $ 30,820 $ 62,104 $ 60,992 On September 28, 2015, the Company announced that its board of directors declared a cash dividend of $0.06 per share that was paid on October 22, 2015 to shareholders of record as of October 8, 2015. The Company subsequently announced that its board of directors declared a quarterly cash dividends of $0.06 per share that were paid in December 2015 and April 2016. The Company has since announced that its board of directors declared a cash dividend of $0.06 per share paid on July 12, 2016 to shareholders of record as of June 14, 2016.

Share-Based Compensation

Share-Based Compensation	6 Months Ended
	Aug. 01, 2015
Share-Based Compensation	Note 12. Share-Based Compensation The following table presents details of share-based compensation expenses by functional line item (in thousands): Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Cost of goods sold $ 2,012 $ 1,733 $ 3,559 $ 4,032 Research and development 27,808 24,276 52,589 44,644 Selling and marketing 2,707 2,617 5,284 5,545 General and administrative 4,147 6,394 8,463 10,768 $ 36,674 $ 35,020 $ 69,895 $ 64,989 Share-based compensation capitalized in inventory was $2.0 million at August 1, 2015 and $1.5 million at January 31, 2015. Upon the termination of certain members of our executive management in April 2016, it was determined that the vesting in certain of their unvested stock awards was not probable. As a result, the Company recorded a reversal of the previously recognized related share-based compensation expense in the first quarter of fiscal 2017. Valuation Assumptions The following weighted average assumptions were used for each respective period to calculate the fair value of each time-based stock option award on the date of grant using the Black-Scholes valuation model and of each market-based equity award using a Monte Carlo simulation model: Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Time-based Stock Options: Weighted average fair value $ 3.97 $ 3.98 $ 3.98 $ 4.37 Expected volatility 34 % 34 % 34 % 35 % Expected term (in years) 5.4 5.0 5.4 5.0 Risk-free interest rate 1.6 % 1.7 % 1.6 % 1.6 % Expected dividend yield 1.7 % 1.6 % 1.7 % 1.6 % Three and Six Months Ended August 1, August 2, Employee Stock Purchase Plan: Estimated fair value $ 3.78 $ 4.13 Volatility 31 % 32 % Expected term (in years) 1.3 1.3 Risk-free interest rate 0.4 % 0.2 % Dividend yield 1.7 % 1.6 % Six Months Ended August 1, 2015 Total Shareholder Return Awards: Expected term (in years) 2.0 Expected volatility 27 % Average correlation coefficient of peer companies 0.4 % Risk-free interest rate 0.5 % Expected dividend yield 1.7 % The correlation coefficients are calculated based upon the price date used to calculate the historical volatilities and is used to model the way in which each entity tends to move in relation to its peers.

Related Party Transaction

Related Party Transaction	6 Months Ended
	Aug. 01, 2015
Related Party Transaction	Note 13. Related Party Transaction In February 2015, the Executive Compensation Committee (“Committee”) of the Company’s Board of Directors approved a cash payment of approximately $15.4 million to Dr. Sehat Sutardja, the Company’s former Chief Executive Officer, which was recorded in the first quarter of fiscal 2016 and is included in general and administrative expense for the six months ended August 1, 2015. The U.S. Court of Federal Claims ruled against Dr. Sutardja in his legal challenge with the Internal Revenue Service and the California Franchise Tax Board related to the tax treatment of several stock options granted in fiscal 2004. After discussing and evaluating the alternatives to a continuing legal challenge of the court’s determination, the likelihood of success of further appeal by Dr. Sutardja and the potential negative impact on the Company of a continuation of the case regardless of the outcome, the Committee determined to provide Dr. Sutardja with relief from the financial effects of the penalty taxes. Accordingly, the Committee approved the cash payment to Dr. Sutardja equal to the amount of his penalty taxes owed under the Tax Codes, plus accrued interest owed with respect to such liabilities, all grossed-up for income taxes that will be owed by Dr. Sutardja on receipt of such cash payment. The Company paid $8.4 million to Dr. Sutardja in the six months ended August 1, 2015 representing reimbursement for the U.S. federal tax portion. As of August 1, 2015, the Company had a remaining $7.0 million liability to Dr. Sutardja.

Subsequent Events

Subsequent Events	6 Months Ended
	Aug. 01, 2015
Subsequent Events	Note 14. Subsequent Events In April 2016, the employment of Dr. Sehat Sutardja as Chief Executive Officer and Weili Dai as President was terminated by the Company’s Board of Directors. Dr. Sutardja and Ms. Dai remain on the Board of Directors at this time. The Board of Directors then formed an Interim Office of the Chief Executive and appointed Maya Strelar-Migotti, Executive Vice President of the Smart Networked Devices and Solutions Business Group, and Dr. Pantelis Alexopoulos, Executive Vice President of the Storage Business Group, as Interim Co-Chief Executive Officers, each having the authority to exercise all powers of the Chief Executive Officer. In June 2016, the Board of Directors appointed Matthew J. Murphy to serve as the Company’s President and Chief Executive Officer, effective July 11, 2016. Upon the commencement of Mr. Murphy’s employment, Ms. Strelar-Migotti and Dr. Alexopoulos returned to their roles as Executive Vice Presidents of the Company. The Board subsequently appointed Richard S. Hill, the Chairman of the Board, as the Company’s Interim Principal Executive Officer, to serve in that capacity until the Company files its Quarterly Report on Form 10-Q for the second quarter of fiscal 2017 (“Q217 Form 10-Q”). Mr. Murphy will assume the role of the Company’s principal executive officer immediately following the filing of the Q217 Form 10-Q. Mr. Murphy also joined the Board of Directors on July 11, 2016. Also in April 2016, the Company announced that it entered into an agreement with Starboard Value LP (“Starboard”), regarding the composition of its Board of Directors. Under the terms of the agreement, the Company elected Peter A. Feld, Richard S. Hill, Oleg Khaykin, Michael Strachan and Robert Switz to serve on its board. Mr. Hill replaced Dr. Sutardja as the Chairman of the Board in May 2016. The agreement specifies that the Board will recommend and the Company will support and solicit proxies only for the election at the 2016 annual general meeting of Messrs. Feld, Hill, Khaykin, Murphy, Strachan and Switz and the four independent directors serving on the Board immediately prior to the execution of the agreement, Dr. Gromer, Dr. Kassakian, Mr. Krueger and Dr. Thakur. In February 2016, the Company and CMU settled their patent infringement lawsuit pursuant to a court-ordered mediation and entered into a Settlement Agreement and Patent License (the “Agreement”). The parties agreed to mutual release of claims, license and covenant not to sue provisions for which the Company will pay an aggregate of $750 million to CMU. See CMU litigation under “Note 10 – Commitments and Contingencies” for further information about the lawsuit. The Agreement was accounted for as a multiple-element arrangement and accordingly, a valuation was completed to determine the estimated fair value of each identifiable element. As a result, the Company allocated $654.7 million to the mutual release of claims and covenant not to sue provisions; $81.3 million to the licensing of intellectual property in fiscal 2016; and the remaining $14.0 million representing the future use of the license through April 2018. The $654.7 million for the mutual release of claims and covenant not to sue was recorded in three and six months ended August 1, 2015 as a settlement charge reported separately in operating expenses since there is no future benefit. Of the $81.3 million license fee, $78.9 million was recorded in the three and six months ended August 1, 2015 as a charge in cost of goods sold for past use of the license with the remaining $2.4 million to be charged to cost of goods sold for the remainder of fiscal 2016. Due to the contingent status of the litigation at August 1, 2015, these charges were recorded in the three and six months ended August 1, 2015 since those unaudited condensed consolidated financial statements had not been filed with the Securities and Exchange Commission at the time the settlement was reached. The Company considers its existing cash, cash equivalents and short-term investments to be sufficient to cover payment of the $750 million settlement, and in April 2016, the Company completed full payment of the $750 million to CMU.

The Company and Basis of Pres21

The Company and Basis of Presentation (Policies)	6 Months Ended
	Aug. 01, 2015
Basis of Presentation	Basis of Presentation The Company’s fiscal year is the 52- or 53-week period ending on the Saturday closest to January 31. In a 52-week year, each fiscal quarter consists of 13 weeks. The additional week in a 53-week year is added to the fourth quarter, making such quarter consist of 14 weeks. Fiscal 2016 and 2015 each have a 52-week period. The unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for annual financial statements. In the opinion of management, all adjustments consisting of normal and recurring entries considered necessary for a fair statement of the results for the interim periods have been included in the Company’s unaudited condensed consolidated balance sheet as of August 1, 2015, the results of its operations for the three and six months ended August 1, 2015 and August 2, 2014, its comprehensive income for the three and six months ended August 1, 2015 and August 2, 2014, and its cash flows for the six months ended August 1, 2015 and August 2, 2014. The January 31, 2015 condensed consolidated balance sheet data was derived from the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended January 31, 2015, but does not include all disclosures required for annual periods. These condensed consolidated financial statements and related notes are unaudited and should be read in conjunction with the Company’s audited financial statements and related notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended January 31, 2015 as filed on March 26, 2015 with the Securities and Exchange Commission. The results of operations for the three and six months ended August 1, 2015 are not necessarily indicative of the results that may be expected for any other interim period or for the full fiscal year.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, the Company evaluates its estimates, including those related to performance-based compensation, revenue recognition, provisions for sales returns and allowances, inventory excess and obsolescence, investment fair values, goodwill and other intangible assets, restructuring, income taxes, litigation and other contingencies. In addition, the Company uses assumptions when employing the Monte Carlo simulation and Black-Scholes valuation models to calculate the fair value of share-based awards that are granted. Actual results could differ from these estimates, and such differences could affect the results of operations reported in future periods.
Principles of Consolidation	Principles of Consolidation The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated. The functional currency of the Company and its subsidiaries is the U.S. dollar.
Accounting Pronouncements Recently Adopted	Accounting Pronouncements Recently Adopted In April 2014, the Financial Accounting Standards Board (“FASB”) issued an amendment to its guidance regarding the reporting requirements of discontinued operations, which was effective for the Company beginning in the first quarter of fiscal 2016. Under the amended guidance, a discontinued operation is defined as a disposal of a component or group of components that is disposed of or is classified as held for sale and represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results. As a result, the Company has adopted and will apply the new guidance for any future dispositions that meet the criteria of a discontinued operation under the amendment. In November 2015, the FASB issued a new standard to simplify the presentation of deferred income taxes. Currently, deferred income tax assets and liabilities are separately presented as current and non-current amounts on the consolidated balance sheet. The new standard will require that deferred tax assets and liabilities be classified and presented on the balance sheet as non-current. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016, although early adoption is permitted. The Company will adopt the new guidance at the beginning of its fourth quarter of fiscal 2016 on a prospective basis, and will not retrospectively adjust any prior periods. Adoption will have no impact on the Company’s consolidated results of operations and it had no material impact on working capital.
Accounting Pronouncements Not Yet Effective	Accounting Pronouncements Not Yet Effective In May 2014, the FASB issued a new standard on the recognition of revenue from contracts with customers, which will supersede nearly all existing revenue recognition guidance under GAAP. Under the new standard, recognition of revenue occurs when a customer obtains control of promised goods or services in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Additional disclosures regarding the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers, and assets recognized from costs incurred to obtain or fulfill a contract will also be required. The FASB subsequently issued an update to this standard in August 2015, which provides deferral of the effective date by one year. The standard is now effective for the Company’s first quarter of fiscal 2019 and allows for either full retrospective or modified retrospective adoption. Early adoption is permitted only as of annual reporting periods beginning after December 15, 2016 and including interim reporting periods within such reporting period. The FASB has since issued additional updates of its new standard on revenue recognition issued in May 2014. In March 2016, an amendment was issued to clarify the implementation guidance on principal versus agent consideration. The guidance requires entities to determine whether the nature of its promise to provide goods or services to a customer is performed in a principal or agent capacity and to recognize revenue in a gross or net manner based on its principal/agent designation. In April 2016, amendments were issued to clarify the identification of performance obligations and the licensing implementation guidance in the initial standard. Amendments were issued in May 2016 related to its guidance on assessing collectability, presentation of sales tax, noncash consideration, and completed contracts and contract modification at transition, which reduce the potential for diversity in practice, and the cost and complexity of application at transition and on an ongoing basis. The Company has been evaluating the effects of the new guidance and has not yet selected a transition method nor has it determined the potential effects of adoption on its consolidated financial statements. In April 2015, the FASB issued new guidance to help entities evaluate the accounting for fees paid by a customer in a cloud computing arrangement. The guidance provides a basis for evaluating whether a cloud computing arrangement includes a software license or whether the arrangement should be accounted for as a service contract. The guidance is effective for annual and interim reporting periods beginning after December 15, 2015. The newly issued guidance also strikes from previous authoritative guidance, the use by analogy to the accounting for capital leases, which the Company applied in the accounting for certain of its technology license agreements. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In July 2015, the FASB issued an amendment to its guidance regarding the subsequent measurement of inventory. Currently, inventory is measured at the lower of cost or market. Market could be replacement cost, net realizable value or net realizable value less an approximately normal profit margin. Under this amended guidance, inventory is to be measured at the lower of cost and net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal and transportation. This amendment applies to inventories for which cost is determined by methods other than last-in first-out and the retail inventory method. This standard is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In January 2016, the FASB issued new guidance which requires entities to measure all investments in equity securities at fair value with changes recognized through net income. This requirement does not apply to investments that qualify for the equity method of accounting, investments that result in consolidation of the investee, or investments for which the entity meets a practicability exception to fair value measurement. The new guidance also changes certain disclosure requirements for financial instruments. This standard is effective for annual and interim reporting periods beginning after December 15, 2017. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In March 2016, the FASB issued an amendment to its guidance on the effects of derivative contract novations on existing hedge accounting relationships. The new guidance clarifies that a change in the counterparty to a designated hedging instrument, in and of itself, does not require the de-designation of that hedging relationship, provided that all other hedge accounting criteria continue to be met. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In March 2016, the FASB issued a new standard on the accounting for leases, which requires a lessee to record a right-of-use asset and a corresponding lease liability on the balance sheet for all leases with terms longer than twelve months. The standard also expands the required quantitative and qualitative disclosures surrounding lease arrangements. The standard is effective for annual and interim reporting periods beginning after December 15, 2018. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In March 2016, the FASB issued an amendment to its guidance for investments that eliminates the requirement to retrospectively apply the equity method in previous periods when an investor initially obtains significant influence over an investee. Under the amended guidance, the investor should apply the equity method prospectively from the date the investment qualifies for the equity method. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In March 2016, the FASB issued new guidance which simplifies several aspects of the accounting for share-based payment award transactions, including the accounting for income taxes, forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. The guidance is effective for annual and interim reporting periods beginning after December 15, 2016. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In June 2016, the FASB issued a new standard requiring financial assets measured at amortized cost be presented at the net amount expected to be collected, through an allowance for credit losses that is deducted from the amortized cost basis. The standard eliminates the probable initial recognition in current GAAP and reflects an entity’s current estimate of all expected credit losses. The measurement of expected credit losses is based upon historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the financial assets. The standard is effective for annual and interim reporting periods beginning after December 15, 2019. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements.

Investments (Tables)

Investments (Tables)	6 Months Ended
	Aug. 01, 2015
Schedule of Available-for-sale Securities Reconciliation	The following tables summarize the Company’s investments (in thousands): August 1, 2015 Amortized Gross Gross Estimated Short-term investments: Available-for-sale: Corporate debt securities $ 1,024,112 $ 1,643 $ (1,557 ) $ 1,024,198 U.S. government and agency debt 229,731 176 (19 ) 229,888 Asset backed securities 101,216 99 (12 ) 101,303 Foreign government and agency debt 16,945 7 (10 ) 16,942 Municipal debt securities 37,780 38 (32 ) 37,786 Total short-term investments 1,409,784 1,963 (1,630 ) 1,410,117 Long-term investments: Available-for-sale: Auction rate securities 12,500 — (2,377 ) 10,123 Total long-term investments 12,500 — (2,377 ) 10,123 Total investments $ 1,422,284 $ 1,963 $ (4,007 ) $ 1,420,240 January 31, 2015 Amortized Gross Gross Estimated Short-term investments: Available-for-sale: Corporate debt securities $ 983,008 $ 3,872 $ (563 ) $ 986,317 U.S. government and agency debt 178,898 265 (7 ) 179,156 Asset backed securities 91,432 108 (9 ) 91,531 Foreign government and agency debt 28,051 61 (2 ) 28,110 Municipal debt securities 33,421 47 (4 ) 33,464 Total short-term investments 1,314,810 4,353 (585 ) 1,318,578 Long-term investments: Available-for-sale: Auction rate securities 12,500 — (2,274 ) 10,226 Total long-term investments 12,500 — (2,274 ) 10,226 Total investments $ 1,327,310 $ 4,353 $ (2,859 ) $ 1,328,804
Gross Realized Gains and Losses on Sales of Available-for-Sale Securities	Gross realized gains and gross realized losses on sales of available-for-sale securities are presented in the following tables (in thousands): Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Gross realized gains $ 255 $ 480 $ 698 $ 952 Gross realized losses (230 ) — (337 ) (25 ) Total net realized gains $ 25 $ 480 $ 361 $ 927
Investments Classified by Contractual Maturity Date	The contractual maturities of available-for-sale securities are presented in the following tables (in thousands): August 1, 2015 January 31, 2015 Amortized Estimated Amortized Estimated Due in one year or less $ 332,385 $ 332,406 $ 361,108 $ 361,396 Due between one and five years 1,068,461 1,068,779 950,702 954,151 Due over five years 21,438 19,055 15,500 13,257 $ 1,422,284 $ 1,420,240 $ 1,327,310 $ 1,328,804
Unrealized Loss Position Investments	For individual securities that have been in a continuous unrealized loss position, the fair value and gross unrealized loss for these securities aggregated by investment category and length of time in an unrealized position are presented in the following tables (in thousands): August 1, 2015 Less than 12 months 12 months or more Total Fair Value Unrealized Fair Unrealized Fair Value Unrealized Corporate debt securities $ 490,575 $ (1,539 ) $ 6,053 $ (18 ) $ 496,628 $ (1,557 ) U.S. government and agency debt 64,067 (19 ) — — 64,067 (19 ) Asset backed securities 30,602 (12 ) — — 30,602 (12 ) Foreign government and agency debt 13,938 (10 ) — — 13,938 (10 ) Municipal debt securities 10,532 (32 ) — — 10,532 (32 ) Auction rate securities — — 10,123 (2,377 ) 10,123 (2,377 ) Total securities $ 609,714 $ (1,612 ) $ 16,176 $ (2,395 ) $ 625,890 $ (4,007 ) January 31, 2015 Less than 12 months 12 months or more Total Fair Value Unrealized Fair Unrealized Fair Value Unrealized Corporate debt securities $ 243,699 $ (558 ) $ 2,005 $ (5 ) $ 245,704 $ (563 ) U.S. government and agency debt 32,165 (7 ) — — 32,165 (7 ) Asset backed securities 25,053 (9 ) — — 25,053 (9 ) Foreign government and agency debt 2,999 (2 ) — — 2,999 (2 ) Municipal debt securities 2,845 (4 ) — — 2,845 (4 ) Auction rate securities — — 10,226 (2,274 ) 10,226 (2,274 ) Total securities $ 306,761 $ (580 ) $ 12,231 $ (2,279 ) $ 318,992 $ (2,859 )

Supplemental Financial Inform23

Supplemental Financial Information (Tables)	6 Months Ended
	Aug. 01, 2015
Schedule of Inventory, Current	August 1, January 31, Inventories: Work-in-process $ 198,158 $ 183,869 Finished goods 128,945 124,293 Total inventories $ 327,103 $ 308,162
Property, Plant and Equipment	August 1, January 31, Inventories: Work-in-process $ 198,158 $ 183,869 Finished goods 128,945 124,293 Total inventories $ 327,103 $ 308,162 August 1, January 31, Property and equipment, net: Machinery and equipment $ 623,191 $ 601,961 Buildings 144,320 144,320 Computer software 102,801 99,312 Land 53,373 53,373 Building improvements 49,902 49,753 Leasehold improvements 50,350 51,434 Furniture and fixtures 27,531 27,883 Construction in progress 4,680 6,167 1,056,148 1,034,203 Less: Accumulated depreciation and amortization (733,886 ) (693,564 ) Total property and equipment, net $ 322,262 $ 340,639
Schedule of Other Assets, Noncurrent	August 1, January 31, Other non-current assets: Technology and other licenses $ 48,518 $ 61,217 Deferred tax assets 19,288 22,273 Investments in privately-held companies 8,556 9,267 Prepaid land use rights 13,277 13,432 Deposits 7,649 7,903 Other 13,169 14,747 Total other non-current assets $ 110,457 $ 128,839
Schedule of Accrued Liabilities	August 1, January 31, Accrued liabilities: Accrued rebates $ 35,826 $ 39,105 Accrued royalties 19,130 24,680 Accrued share repurchases 19,672 — Technology license obligations 10,802 14,428 Accrued legal expense 5,460 8,327 Accrued litigation 11,238 1,700 Other 58,841 43,148 Total accrued liabilities $ 160,969 $ 131,388
Other Noncurrent Liabilities	August 1, January 31, Other non-current liabilities: Technology license obligations $ 12,767 $ 16,468 Long-term accrued employee compensation 6,323 4,610 Other 8,347 11,115 Other non-current liabilities $ 27,437 $ 32,193
Changes in Accumulated Other Comprehensive Income (loss) by Components	The changes in accumulated other comprehensive income (loss) by components are presented in the following tables (in thousands): Unrealized Gain Unrealized Gain Unrealized Gain Total Balance at January 31, 2015 $ 3,768 $ (2,274 ) $ (1,186 ) $ 308 Other comprehensive income (loss) before reclassifications (2,865 ) (103 ) 1,166 (1,802 ) Amounts reclassified from accumulated other comprehensive income (loss) (453 ) — 669 216 Other comprehensive income (loss), net of tax (3,318 ) (103 ) 1,835 (1,586 ) Balance at August 1, 2015 $ 450 $ (2,377 ) $ 649 $ (1,278 ) Unrealized Gain Unrealized Gain Unrealized Gain Total Balance at February 1, 2014 $ 2,534 $ (2,871 ) $ 934 $ 597 Other comprehensive income before reclassifications 1,012 143 734 1,889 Amounts reclassified from accumulated other comprehensive income (loss) (855 ) — (1,004 ) (1,859 ) Other comprehensive income (loss), net of tax 157 143 (270 ) 30 Balance at August 2, 2014 $ 2,691 $ (2,728 ) $ 664 $ 627
Amounts Reclassified from Accumulated Other Comprehensive Income (loss) by Components	The amounts reclassified from accumulated other comprehensive income (loss) by components are presented in the following table (in thousands): Three Months Ended Six Months Ended Affected Line Item in the August 1, August 2, August 1, August 2, Interest and other income, net: Available-for-sale securities: Marketable securities $ 121 $ 435 $ 453 $ 855 Operating cost and expenses: Cash flow hedges: Research and development 251 200 (613 ) 921 Selling and marketing 4 19 (63 ) 81 General and administrative 20 — 7 2 Total $ 396 $ 654 $ (216 ) $ 1,859
Interest and Other Income, Net	Consolidated Statements of Operations Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Interest and other income, net: Interest income $ 3,971 $ 2,315 $ 8,048 $ 4,924 Net realized gain on investments 25 480 361 927 Currency translation gain (loss) 3,494 339 3,901 (686 ) Other income (expense) (508 ) 9,438 59 9,657 Interest expense (192 ) (309 ) (412 ) (634 ) $ 6,790 $ 12,263 $ 11,957 $ 14,188
Schedule of Calculation of Numerator and Denominator in Earnings Per Share	The computations of basic and diluted net income (loss) per share are presented in the following table (in thousands, except per share amounts): Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Numerator: Net income (loss) $ (771,940 ) $ 138,870 $ (757,850 ) $ 238,349 Denominator: Weighted average shares — basic 516,368 511,821 516,298 508,463 Effect of dilutive securities: Share-based awards — 8,448 — 12,047 Weighted average shares — diluted 516,368 520,269 516,298 520,510 Net income (loss) per share: Basic $ (1.49 ) $ 0.27 $ (1.47 ) $ 0.47 Diluted $ (1.49 ) $ 0.27 $ (1.47 ) $ 0.46
Anti-dilutive Potential Shares	Anti-dilutive potential shares are presented in the following table (in thousands): Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Weighted average shares outstanding: Share-based awards 57,437 26,132 57,519 24,341

Derivative Financial Instrume24

Derivative Financial Instruments (Tables)	6 Months Ended
	Aug. 01, 2015
Schedule of Derivative Instruments	The notional amounts of outstanding forward contracts were as follows (in thousands): Buy Contracts August 1, 2015 January 31, 2015 Israeli shekel $ 18,749 $ 51,326
Information about Gains (Losses) Associated with Derivative Financial Instruments	The following table provides information about gains (losses) associated with the Company’s derivative financial instruments (in thousands): Amount of Gains (Losses) in Statement of Operations Three Months Ended Six Months Ended Location of Gains (Losses) August 1, August 2, August 1, August 2, Derivatives designated as cash flow hedges: Forward contracts: Research and development $ 415 $ 311 $ (576 ) $ 909 Selling and marketing 6 30 (71 ) 82 General and administrative 32 (3 ) 18 (1 ) $ 453 $ 338 $ (629 ) $ 990

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Aug. 01, 2015
Fair Value, Assets and Liabilities Measured on Recurring Basis	The tables below set forth, by level, the Company’s assets and liabilities that are measured at fair value on a recurring basis. The tables do not include assets and liabilities that are measured at historical cost or any basis other than fair value (in thousands): August 1, 2015 Level 1 Level 2 Level 3 Total Assets Cash equivalents: Money market funds $ 14,819 $ — $ — $ 14,819 Time deposits — 204,358 — 204,358 Corporate debt securities — 20,675 — 20,675 Short-term investments: U.S. government and agency debt 229,888 — — 229,888 Corporate debt securities — 1,024,198 — 1,024,198 Asset backed securities — 101,303 — 101,303 Foreign government and agency debt — 16,942 — 16,942 Municipal debt securities — 37,786 — 37,786 Prepaid expenses and other current assets: Foreign currency forward contracts — 624 — 624 Long-term investments: Auction rate securities — — 10,123 10,123 Other non-current assets: Severance pay fund — 1,925 — 1,925 Total assets $ 244,707 $ 1,407,811 $ 10,123 $ 1,662,641 January 31, 2015 Level 1 Level 2 Level 3 Total Assets Cash equivalents: Money market funds $ 111,286 $ — $ — $ 111,286 Time deposits — 213,012 — 213,012 Corporate debt securities — 21,999 — 21,999 Short-term investments: U.S. government and agency debt 179,156 — — 179,156 Corporate debt securities — 986,317 — 986,317 Asset backed securities — 91,531 — 91,531 Foreign government and agency debt — 28,110 — 28,110 Municipal debt securities — 33,464 — 33,464 Prepaid expenses and other current assets: Foreign currency forward contracts — 124 — 124 Long-term investments: Auction rate securities — — 10,226 10,226 Other non-current assets: Severance pay fund — 1,758 — 1,758 Total assets $ 290,442 $ 1,376,315 $ 10,226 $ 1,676,983 Liabilities Accrued liabilities: Foreign currency forward contracts $ — $ 1,379 $ — $ 1,379
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The following table summarizes the change in fair value for Level 3 assets (in thousands): Six Months Ended August 1, August 2, Beginning balance $ 10,226 $ 16,279 Sales and redemptions — (3,000 ) Unrealized losses included in accumulated other comprehensive income (103 ) 143 Ending balance $ 10,123 $ 13,422

Acquired Intangible Assets, N26

Acquired Intangible Assets, Net (Tables)	6 Months Ended
	Aug. 01, 2015
Schedule of Finite-Lived Intangible Assets by Major Class	The carrying amounts of acquired intangible assets, net, are as follows (in thousands): August 1, 2015 January 31, 2015 Range of Gross Accumulated Write-Offs Net Gross Accumulated Write-Offs Net Purchased and core technology 4 - 8 years $ 36,348 $ (19,303 ) $ 17,045 $ 36,348 $ (16,107 ) $ 20,241 Trade names 5 years 1,300 (958 ) 342 1,300 (828 ) 472 Customer intangibles 5 - 7 years 28,600 (21,395 ) 7,205 28,600 (18,615 ) 9,985 Total intangible assets, net $ 66,248 $ (41,656 ) $ 24,592 $ 66,248 $ (35,550 ) $ 30,698
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	Based on the identified intangible assets recorded at August 1, 2015, the future amortization expense for the next five fiscal years is as follows (in thousands): Fiscal Year Remainder of fiscal 2016 $ 6,106 2017 11,027 2018 5,599 2019 1,860 2020 and thereafter — $ 24,592

Restructuring and Other Relat27

Restructuring and Other Related Charges (Tables)	6 Months Ended
	Aug. 01, 2015
Schedule of Restructuring Reserve by Type of Cost	The following table provides a summary of restructuring and other related charges as presented in the unaudited condensed consolidated statements of operations (in thousands): Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Restructuring and other related charges $ 13,000 $ 735 $ 13,592 $ 5,823 Write-off of acquired intangible assets — — — 3,386 $ 13,000 $ 735 $ 13,592 $ 9,209 The following table presents details of charges recorded by the Company related to the restructuring actions described below (in thousands): Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Severance and related costs $ 11,705 $ 418 $ 11,705 $ 5,035 Facilities and related costs 206 254 225 698 Other exit-related costs 189 63 189 73 12,100 735 12,119 5,806 Impairment and write-off of assets: Equipment 900 — 1,473 17 Acquired intangible asset — — — 3,386 $ 13,000 $ 735 $ 13,592 $ 9,209
Reconciliation of Beginning and Ending Restructuring Liability Balances by Major Type of Costs	The following table sets forth a reconciliation of the beginning and ending restructuring liability balances by each major type of costs associated with the restructuring charges (in thousands): Severance Facilities Other Exit-Related Total Balance at January 31, 2015 $ — $ 1,339 $ 3,230 $ 4,569 Restructuring charges 11,705 225 189 12,119 Net cash payments (2,392 ) (476 ) (3,419 ) (6,287 ) Exchange rate adjustment (104 ) (67 ) — (171 ) Balance at August 1, 2015 $ 9,209 $ 1,021 $ — $ 10,230

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	6 Months Ended
	Aug. 01, 2015
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award	Stock option activity under the Company’s stock option and stock incentive plans is included in the following table (in thousands, except per share amounts): Time-Based Options Market-Based Options Total Number of Weighted Exercise Price Number of Weighted Exercise Price Number of Weighted Average Exercise Price Balance at January 31, 2015 47,140 $ 13.79 2,232 $ 15.43 49,372 $ 13.88 Granted 5,872 $ 14.37 — $ — 5,872 $ 14.37 Exercised (1,829 ) $ 10.24 — $ — (1,829 ) $ 10.24 Canceled/Forfeited (3,718 ) $ 16.80 (8 ) $ 15.43 (3,726 ) $ 16.80 Balance at August 1, 2015 47,465 $ 13.77 2,224 $ 15.43 49,689 $ 13.84 Vested or expected to vest at August 1, 2015 44,264 $ 13.77 Exercisable at August 1, 2015 24,586 $ 14.44
Schedule of Nonvested Share Activity	Activity related to the non-vested portion of the restricted stock units is included in the following table (in thousands, except for share prices): Time-Based Performance-Based Market-Based Total Number of Weighted Grant Date Fair Value Number of Weighted Grant Date Fair Value Number of Weighted Grant Date Fair Value Number of Weighted Grant Date Fair Value Balance at January 31, 2015 9,748 $ 14.84 1,254 $ 14.99 11,002 $ 14.85 Granted 4,873 $ 13.66 669 $ 14.08 407 $ 12.24 5,949 $ 13.61 Vested (4,601 ) $ 15.30 (658 ) $ 15.15 — $ — (5,259 ) $ 15.28 Canceled/Forfeited (409 ) $ 14.06 (227 ) $ 14.43 (54 ) $ 12.24 (690 ) $ 13.09 Balance at August 1, 2015 9,611 $ 14.05 1,038 $ 14.42 353 $ 12.24 11,002 $ 14.03
Schedule of Cash Dividends	The Company paid the following cash dividends (in thousands, except per share amounts): Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Cash dividend per share $ 0.06 $ 0.06 $ 0.12 $ 0.12 Total payment to shareholders $ 31,194 $ 30,820 $ 62,104 $ 60,992

Share-Based Compensation (Table

Share-Based Compensation (Tables)	6 Months Ended
	Aug. 01, 2015
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	The following table presents details of share-based compensation expenses by functional line item (in thousands): Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Cost of goods sold $ 2,012 $ 1,733 $ 3,559 $ 4,032 Research and development 27,808 24,276 52,589 44,644 Selling and marketing 2,707 2,617 5,284 5,545 General and administrative 4,147 6,394 8,463 10,768 $ 36,674 $ 35,020 $ 69,895 $ 64,989
Employee Stock Purchase Plan
Weighted Average Assumptions Used to Calculate Fair Value Awards	Three and Six Months Ended August 1, August 2, Employee Stock Purchase Plan: Estimated fair value $ 3.78 $ 4.13 Volatility 31 % 32 % Expected term (in years) 1.3 1.3 Risk-free interest rate 0.4 % 0.2 % Dividend yield 1.7 % 1.6 %
Total Shareholder Return
Weighted Average Assumptions Used to Calculate Fair Value Awards	Six Months Ended August 1, 2015 Total Shareholder Return Awards: Expected term (in years) 2.0 Expected volatility 27 % Average correlation coefficient of peer companies 0.4 % Risk-free interest rate 0.5 % Expected dividend yield 1.7 %
Time Based Option Award
Weighted Average Assumptions Used to Calculate Fair Value Awards	The following weighted average assumptions were used for each respective period to calculate the fair value of each time-based stock option award on the date of grant using the Black-Scholes valuation model and of each market-based equity award using a Monte Carlo simulation model: Three Months Ended Six Months Ended August 1, August 2, August 1, August 2, Time-based Stock Options: Weighted average fair value $ 3.97 $ 3.98 $ 3.98 $ 4.37 Expected volatility 34 % 34 % 34 % 35 % Expected term (in years) 5.4 5.0 5.4 5.0 Risk-free interest rate 1.6 % 1.7 % 1.6 % 1.6 % Expected dividend yield 1.7 % 1.6 % 1.7 % 1.6 %

Summary of Investments (Detail)

Summary of Investments (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Gain (Loss) on Investments [Line Items]
Amortized Cost	$ 1,422,284	$ 1,327,310
Gross Unrealized Gains	1,963	4,353
Gross Unrealized Losses	(4,007)	(2,859)
Estimated Fair Value	1,420,240	1,328,804
Short-term Investments
Gain (Loss) on Investments [Line Items]
Amortized Cost	1,409,784	1,314,810
Gross Unrealized Gains	1,963	4,353
Gross Unrealized Losses	(1,630)	(585)
Estimated Fair Value	1,410,117	1,318,578
Short-term Investments | Corporate debt securities
Gain (Loss) on Investments [Line Items]
Amortized Cost	1,024,112	983,008
Gross Unrealized Gains	1,643	3,872
Gross Unrealized Losses	(1,557)	(563)
Estimated Fair Value	1,024,198	986,317
Short-term Investments | U.S. government and agency debt
Gain (Loss) on Investments [Line Items]
Amortized Cost	229,731	178,898
Gross Unrealized Gains	176	265
Gross Unrealized Losses	(19)	(7)
Estimated Fair Value	229,888	179,156
Short-term Investments | Asset-backed Securities
Gain (Loss) on Investments [Line Items]
Amortized Cost	101,216	91,432
Gross Unrealized Gains	99	108
Gross Unrealized Losses	(12)	(9)
Estimated Fair Value	101,303	91,531
Short-term Investments | Foreign government and agency debt
Gain (Loss) on Investments [Line Items]
Amortized Cost	16,945	28,051
Gross Unrealized Gains	7	61
Gross Unrealized Losses	(10)	(2)
Estimated Fair Value	16,942	28,110
Short-term Investments | Municipal debt securities
Gain (Loss) on Investments [Line Items]
Amortized Cost	37,780	33,421
Gross Unrealized Gains	38	47
Gross Unrealized Losses	(32)	(4)
Estimated Fair Value	37,786	33,464
Long-term investments
Gain (Loss) on Investments [Line Items]
Amortized Cost	12,500	12,500
Gross Unrealized Losses	(2,377)	(2,274)
Estimated Fair Value	10,123	10,226
Long-term investments | Auction rate securities
Gain (Loss) on Investments [Line Items]
Amortized Cost	12,500	12,500
Gross Unrealized Losses	(2,377)	(2,274)
Estimated Fair Value	$ 10,123	$ 10,226

Investments - Additional Inform

Investments - Additional Information (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Gain (Loss) on Investments [Line Items]
Amortized Cost	$ 1,422,284	$ 1,327,310
Gross Unrealized Losses	4,007	2,859
Cash, cash equivalents and short-term investments	2,300,000
Long-term investments
Gain (Loss) on Investments [Line Items]
Amortized Cost	12,500	12,500
Gross Unrealized Losses	2,377	2,274
Long-term investments | Auction rate securities
Gain (Loss) on Investments [Line Items]
Amortized Cost	12,500	12,500
Gross Unrealized Losses	$ 2,377	$ 2,274

Gross Realized Gains and Losses

Gross Realized Gains and Losses on Sales of Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains	$ 255	$ 480	$ 698	$ 952
Gross realized losses	(230)		(337)	(25)
Total net realized gains	$ 25	$ 480	$ 361	$ 927

Contractual Maturities of Avail

Contractual Maturities of Available for Sale Securities (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Amortized Cost
Due in one year or less	$ 332,385	$ 361,108
Due between one and five years	1,068,461	950,702
Due over five years	21,438	15,500
Amortized Cost	1,422,284	1,327,310
Estimated Fair Value
Due in one year or less	332,406	361,396
Due between one and five years	1,068,779	954,151
Due over five years	19,055	13,257
Estimated Fair Value	$ 1,420,240	$ 1,328,804

Summary of Investments Gross Un

Summary of Investments Gross Unrealized Losses and Fair Value (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	$ 609,714	$ 306,761
Less than 12 months Unrealized Losses	(1,612)	(580)
12 months or more Fair Value	16,176	12,231
12 months or more Unrealized Losses	(2,395)	(2,279)
Total Fair Value	625,890	318,992
Total Unrealized Losses	(4,007)	(2,859)
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	490,575	243,699
Less than 12 months Unrealized Losses	(1,539)	(558)
12 months or more Fair Value	6,053	2,005
12 months or more Unrealized Losses	(18)	(5)
Total Fair Value	496,628	245,704
Total Unrealized Losses	(1,557)	(563)
U.S. government and agency debt
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	64,067	32,165
Less than 12 months Unrealized Losses	(19)	(7)
Total Fair Value	64,067	32,165
Total Unrealized Losses	(19)	(7)
Asset-backed Securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	30,602	25,053
Less than 12 months Unrealized Losses	(12)	(9)
Total Fair Value	30,602	25,053
Total Unrealized Losses	(12)	(9)
Foreign government and agency debt
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	13,938	2,999
Less than 12 months Unrealized Losses	(10)	(2)
Total Fair Value	13,938	2,999
Total Unrealized Losses	(10)	(2)
Municipal debt securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months Fair Value	10,532	2,845
Less than 12 months Unrealized Losses	(32)	(4)
Total Fair Value	10,532	2,845
Total Unrealized Losses	(32)	(4)
Auction rate securities
Schedule of Available-for-sale Securities [Line Items]
12 months or more Fair Value	10,123	10,226
12 months or more Unrealized Losses	(2,377)	(2,274)
Total Fair Value	10,123	10,226
Total Unrealized Losses	$ (2,377)	$ (2,274)

Inventories (Detail)

Inventories (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Inventory [Line Items]
Work-in-process	$ 198,158	$ 183,869
Finished goods	128,945	124,293
Total inventories	$ 327,103	$ 308,162

Property and Equipment Net (Det

Property and Equipment Net (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,056,148	$ 1,034,203
Less: Accumulated depreciation	(733,886)	(693,564)
Property and equipment, net	322,262	340,639
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	623,191	601,961
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	144,320	144,320
Computer software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	102,801	99,312
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	53,373	53,373
Building improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	49,902	49,753
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	50,350	51,434
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	27,531	27,883
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 4,680	$ 6,167

Other Non Current Assets (Detai

Other Non Current Assets (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Other non-current assets:
Technology and other licenses	$ 48,518	$ 61,217
Deferred tax assets	19,288	22,273
Investments in privately-held companies	8,556	9,267
Prepaid land use rights	13,277	13,432
Deposits	7,649	7,903
Other	13,169	14,747
Other non-current assets	$ 110,457	$ 128,839

Accrued Liabilities (Detail)

Accrued Liabilities (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Accrued liabilities:
Accrued rebates	$ 35,826	$ 39,105
Accrued royalties	19,130	24,680
Accrued share repurchases	19,672
Technology license obligations	10,802	14,428
Accrued legal expense	5,460	8,327
Accrued litigation	11,238	1,700
Other	58,841	43,148
Accrued liabilities	$ 160,969	$ 131,388

Other Long Term Liabilities (De

Other Long Term Liabilities (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Other non-current liabilities:
Technology license obligations	$ 12,767	$ 16,468
Long-term accrued employee compensation	6,323	4,610
Other	8,347	11,115
Other non-current liabilities	$ 27,437	$ 32,193

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income by Component (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ 308	$ 597
Other comprehensive income (loss) before reclassifications			(1,802)	1,889
Amounts reclassified from accumulated other comprehensive income (loss)			216	(1,859)
Other comprehensive income (loss), net of tax	$ (1,358)	$ 218	(1,586)	30
Ending Balance	(1,278)	627	(1,278)	627
Unrealized Gain (Loss) on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			3,768	2,534
Other comprehensive income (loss) before reclassifications			(2,865)	1,012
Amounts reclassified from accumulated other comprehensive income (loss)			(453)	(855)
Other comprehensive income (loss), net of tax			(3,318)	157
Ending Balance	450	2,691	450	2,691
Unrealized Gain (Loss) on Auction Rate Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(2,274)	(2,871)
Other comprehensive income (loss) before reclassifications			(103)	143
Other comprehensive income (loss), net of tax			(103)	143
Ending Balance	(2,377)	(2,728)	(2,377)	(2,728)
Unrealized Gain (Loss) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(1,186)	934
Other comprehensive income (loss) before reclassifications			1,166	734
Amounts reclassified from accumulated other comprehensive income (loss)			669	(1,004)
Other comprehensive income (loss), net of tax			1,835	(270)
Ending Balance	$ 649	$ 664	$ 649	$ 664

Amounts Reclassified from Accum

Amounts Reclassified from Accumulated Other Comprehensive Income by Components (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and other income, net	$ 6,790	$ 12,263	$ 11,957	$ 14,188
Operating cost and expenses:
Research and development	(285,641)	(294,352)	(565,755)	(585,033)
Selling and marketing	(30,841)	(33,997)	(67,015)	(72,307)
General and administrative	(35,243)	(30,962)	(75,678)	(61,177)
Net income (loss)	(771,940)	138,870	(757,850)	238,349
Reclassification out of Accumulated Other Comprehensive Income
Operating cost and expenses:
Net income (loss)	396	654	(216)	1,859
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gain (Loss) on Marketable Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest and other income, net	121	435	453	855
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gain (Loss) on Cash Flow Hedges
Operating cost and expenses:
Research and development	251	200	(613)	921
Selling and marketing	4	$ 19	(63)	81
General and administrative	$ 20		$ 7	$ 2

Interest and Other Income Net (

Interest and Other Income Net (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Interest and other income, net:
Interest income	$ 3,971	$ 2,315	$ 8,048	$ 4,924
Net realized gain on investments	25	480	361	927
Currency translation gain (loss)	3,494	339	3,901	(686)
Other income (expense)	(508)	9,438	59	9,657
Interest expense	(192)	(309)	(412)	(634)
Interest and other income, net	$ 6,790	$ 12,263	$ 11,957	$ 14,188

Computations of Basic and Dilut

Computations of Basic and Diluted Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Numerator:
Net income (loss)	$ (771,940)	$ 138,870	$ (757,850)	$ 238,349
Denominator:
Weighted average shares - basic	516,368	511,821	516,298	508,463
Effect of dilutive securities:
Share-based awards		8,448		12,047
Weighted average shares - diluted	516,368	520,269	516,298	520,510
Basic	$ (1.49)	$ 0.27	$ (1.47)	$ 0.47
Diluted	$ (1.49)	$ 0.27	$ (1.47)	$ 0.46

Anti-dilutive Potential Shares

Anti-dilutive Potential Shares (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Stock Compensation Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average shares outstanding from share-based awards	57,437	26,132	57,519	24,341

Notional Amounts of Outstanding

Notional Amounts of Outstanding Foreign Currency Forward Contracts (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Foreign Exchange Buy Contracts | Israeli shekel
Derivative [Line Items]
Derivative, notional amount	$ 18,749	$ 51,326

Information about Gains (Losses

Information about Gains (Losses) Associated with Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statement of Operations	$ 453	$ 338	$ (629)	$ 990
Cash flow hedges | Foreign currency forward contracts | Research and development
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statement of Operations	415	311	(576)	909
Cash flow hedges | Foreign currency forward contracts | Selling and marketing
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statement of Operations	6	30	(71)	82
Cash flow hedges | Foreign currency forward contracts | General and administrative
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statement of Operations	$ 32	$ (3)	$ 18	$ (1)

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) $ in Millions	Aug. 01, 2015USD ($)
Fair Value, Measurement Inputs, Disclosure [Line Items]
Percentage of total amount of assets measured using Level 3 valuation methodologies to total assets	0.20%
Carrying value of equipment held for sale	$ 9.3

Assets and Liabilities that are

Assets and Liabilities that are Measured at Fair Value on a Recurring Basis (Detail) - Items measured at fair value - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 31, 2015
Assets
Total assets	$ 1,662,641	$ 1,676,983
Other non-current assets | Severance Pay Fund
Assets
Other non-current asset	1,925	1,758
Corporate debt securities | Short-term Investments
Assets
Investments	1,024,198	986,317
U.S. government and agency debt | Short-term Investments
Assets
Investments	229,888	179,156
Asset-backed Securities | Short-term Investments
Assets
Investments	101,303	91,531
Foreign government and agency debt | Short-term Investments
Assets
Investments	16,942	28,110
Municipal debt securities | Short-term Investments
Assets
Investments	37,786	33,464
Foreign currency forward contracts
Liabilities
Accrued liabilities		1,379
Foreign currency forward contracts | Prepaid expenses and other current assets
Assets
Prepaid expenses and other current assets	624	124
Auction rate securities | Long-term investments
Assets
Investments	10,123	10,226
Cash equivalents | Money market funds
Assets
Cash equivalents	14,819	111,286
Cash equivalents | Time deposits
Assets
Cash equivalents	204,358	213,012
Cash equivalents | Corporate debt securities
Assets
Cash equivalents	20,675	21,999
Level 1
Assets
Total assets	244,707	290,442
Level 1 | U.S. government and agency debt | Short-term Investments
Assets
Investments	229,888	179,156
Level 1 | Cash equivalents | Money market funds
Assets
Cash equivalents	14,819	111,286
Level 2
Assets
Total assets	1,407,811	1,376,315
Level 2 | Other non-current assets | Severance Pay Fund
Assets
Other non-current asset	1,925	1,758
Level 2 | Corporate debt securities | Short-term Investments
Assets
Investments	1,024,198	986,317
Level 2 | Asset-backed Securities | Short-term Investments
Assets
Investments	101,303	91,531
Level 2 | Foreign government and agency debt | Short-term Investments
Assets
Investments	16,942	28,110
Level 2 | Municipal debt securities | Short-term Investments
Assets
Investments	37,786	33,464
Level 2 | Foreign currency forward contracts
Liabilities
Accrued liabilities		1,379
Level 2 | Foreign currency forward contracts | Prepaid expenses and other current assets
Assets
Prepaid expenses and other current assets	624	124
Level 2 | Cash equivalents | Time deposits
Assets
Cash equivalents	204,358	213,012
Level 2 | Cash equivalents | Corporate debt securities
Assets
Cash equivalents	20,675	21,999
Level 3
Assets
Total assets	10,123	10,226
Level 3 | Auction rate securities | Long-term investments
Assets
Investments	$ 10,123	$ 10,226

Summary of Change in Fair Value

Summary of Change in Fair Values for Level Three Items (Detail) - USD ($) $ in Thousands	6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 10,226	$ 16,279
Sales and redemptions		(3,000)
Unrealized losses included in accumulated other comprehensive income	(103)	143
Ending balance	$ 10,123	$ 13,422

Acquired Intangible Assets Net

Acquired Intangible Assets Net (Detail) - USD ($) $ in Thousands	6 Months Ended
	Aug. 01, 2015	Jan. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts	$ 66,248	$ 66,248
Accumulated Amortization and Write-Offs	(41,656)	(35,550)
Net Carrying Amounts	24,592	30,698
Purchased and core technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts, Finite-Lived	36,348	36,348
Accumulated Amortization and Write-Offs	(19,303)	(16,107)
Net Carrying Amounts, Finite-Lived	$ 17,045	20,241
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Lives	5 years
Gross Carrying Amounts, Finite-Lived	$ 1,300	1,300
Accumulated Amortization and Write-Offs	(958)	(828)
Net Carrying Amounts, Finite-Lived	342	472
Customer intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amounts, Finite-Lived	28,600	28,600
Accumulated Amortization and Write-Offs	(21,395)	(18,615)
Net Carrying Amounts, Finite-Lived	$ 7,205	$ 9,985
Minimum | Purchased and core technology
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Lives	4 years
Minimum | Customer intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Lives	5 years
Maximum | Purchased and core technology
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Lives	8 years
Maximum | Customer intangibles
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Lives	7 years

Future Amortization Expense of

Future Amortization Expense of Identified Intangibles (Detail) - In Process Research and Development Excluded $ in Thousands	Aug. 01, 2015USD ($)
Fiscal Year
Remainder of fiscal 2016	$ 6,106
2,017	11,027
2,018	5,599
2,019	1,860
2020 and thereafter	0
Net Carrying Amounts, Finite-Lived	$ 24,592

Restructuring Charges (Detail)

Restructuring Charges (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	May 31, 2015	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges		$ 13,000	$ 735	$ 13,592	$ 5,823
Severance and related costs		11,705	418	11,705	5,035
Facilities and related costs		206	254	225	698
Other exit-related costs		189	63	189	73
Restructuring charges	$ 11,900	12,100	735	12,119	5,806
Impairment and write-off of assets: Equipment		900		1,473	17
Impairment and write-off of assets: Acquired intangible asset					3,386
Restructuring Costs and Asset Impairment Charges, Total		$ 13,000	$ 735	$ 13,592	$ 9,209

Restructuring - Additional Info

Restructuring - Additional Information (Detail)	1 Months Ended		3 Months Ended		6 Months Ended
	Oct. 31, 2015USD ($)	May 31, 2015USD ($)Employee	Aug. 01, 2015USD ($)	Aug. 02, 2014USD ($)	Aug. 01, 2015USD ($)	Aug. 02, 2014USD ($)	Sep. 30, 2015USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 11,900,000	$ 12,100,000	$ 735,000	$ 12,119,000	$ 5,806,000
Total number of employees to be terminated | Employee		313
Lease obligation vocation date		2015-07
Impairment charges of equipment held for sale			900,000		1,473,000	$ 17,000
Carrying value of equipment held for sale			$ 9,300,000		9,300,000
Recognized gain (loss) on sale of equipment					0
Subsequent Event
Restructuring Cost and Reserve [Line Items]
Net proceeds from sale of equipment	$ 9,300,000
Minimum | Subsequent Event
Restructuring Cost and Reserve [Line Items]
Total charge expected to incur							$ 100,000,000
Maximum | Subsequent Event
Restructuring Cost and Reserve [Line Items]
Total charge expected to incur							$ 130,000,000
Corporate Equipment
Restructuring Cost and Reserve [Line Items]
Impairment charges of equipment held for sale					$ 900,000

Reconciliation of Beginning and

Reconciliation of Beginning and Ending Restructuring Liability Balances by Major Type of Costs (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	May 31, 2015	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring liabilities, beginning of balance				$ 4,569
Restructuring charges	$ 11,900	$ 12,100	$ 735	12,119	$ 5,806
Net cash payments				(6,287)
Exchange rate adjustment				(171)
Restructuring liabilities, ending balance		10,230		10,230
Severance and Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges				11,705
Net cash payments				(2,392)
Exchange rate adjustment				(104)
Restructuring liabilities, ending balance		9,209		9,209
Facilities and Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring liabilities, beginning of balance				1,339
Restructuring charges				225
Net cash payments				(476)
Exchange rate adjustment				(67)
Restructuring liabilities, ending balance		$ 1,021		1,021
Other Exit-Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring liabilities, beginning of balance				3,230
Restructuring charges				189
Net cash payments				$ (3,419)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014	Feb. 28, 2015
Income Tax Contingency [Line Items]
Current income tax liability	$ 15.2	$ 4.9	$ 19.5	$ 10.6
Deferred tax asset valuation allowance	6.7		6.7
Unrecognized tax benefits reduction in expiration of statutes of limitation	11.7	13.2	14.8
True-up adjustments	4.8		4.8
Additional tax provision			3.1
Net reduction in unrecognized tax benefits		(7.3)		(9.8)
Tax benefit from an increase in deferred tax asset due to change in negotiated development and expansion incentive		3.7		11.5
Increase in current year unrecognized tax benefit estimates		3.4
Uncertain tax positions decrease from the lapse of statutes of limitation in various jurisdictions during next 12 months	(18.7)		(18.7)
Tax incentives, tax savings amount	1.6	$ 7.1	4.9	$ 10.4
Cash, cash equivalents and short-term investments	2,300		2,300
Undistributed earnings of foreign subsidiaries	$ 550		$ 550
Maximum
Income Tax Contingency [Line Items]
Tax incentives, per share effect on earning	$ 0.01	$ 0.01	$ 0.01	$ 0.02
Former Chief Executive Officer
Income Tax Contingency [Line Items]
Liability to related party					$ 15.4
Foreign Subsidiaries
Income Tax Contingency [Line Items]
Cash, cash equivalents and short-term investments	$ 800		$ 800
Increase (decrease) in tax expense in the event of undistributed earnings needed by parent company or no longer considered indefinitely reinvested outside of Bermuda			$ 160

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	Feb. 16, 2016	Dec. 26, 2012	Apr. 30, 2016	Aug. 01, 2015	Nov. 14, 2014	Aug. 01, 2014
Commitments and Contingencies Disclosure [Line Items]
Accrued litigation				$ 744.8
Carrying value of pledged assets				$ 136.2
Bond Issuance Date				Apr. 21, 2016
Carnegie Mellon Litigation
Commitments and Contingencies Disclosure [Line Items]
Date of lawsuit filed				Mar. 6, 2009
Loss contingency, awarded amount		$ 1,170		$ 1,540
Settlement Agreement and Patent License | Subsequent Event
Commitments and Contingencies Disclosure [Line Items]
Amount agreed to pay pursuant to settlement	$ 750		$ 750
Primary Surety Bond | Subsequent Event
Commitments and Contingencies Disclosure [Line Items]
Bond	439
Secondary Surety Bond | Subsequent Event
Commitments and Contingencies Disclosure [Line Items]
Bond	$ 311
Surety Bond
Commitments and Contingencies Disclosure [Line Items]
Bond					$ 216	$ 1,540
Commitment Letter
Commitments and Contingencies Disclosure [Line Items]
Bond					$ 95
Manufacturing Expense
Commitments and Contingencies Disclosure [Line Items]
Purchase commitment, outstanding commitment				$ 215.2

Stock Option Plan Activity (Det

Stock Option Plan Activity (Detail) shares in Thousands	6 Months Ended
	Aug. 01, 2015$ / sharesshares
Options Outstanding
Beginning Balance | shares	49,372
Granted | shares	5,872
Exercised | shares	(1,829)
Canceled/Forfeited | shares	(3,726)
Ending Balance | shares	49,689
Weighted Average Exercise Price
Beginning Balance | $ / shares	$ 13.88
Granted | $ / shares	14.37
Exercised | $ / shares	10.24
Canceled/Forfeited | $ / shares	16.80
Ending Balance | $ / shares	$ 13.84
Time Based Option Award
Options Outstanding
Beginning Balance | shares	47,140
Granted | shares	5,872
Exercised | shares	(1,829)
Canceled/Forfeited | shares	(3,718)
Ending Balance | shares	47,465
Vested or expected to vest at August 1, 2015 | shares	44,264
Exercisable at August 1, 2015 | shares	24,586
Weighted Average Exercise Price
Beginning Balance | $ / shares	$ 13.79
Granted | $ / shares	14.37
Exercised | $ / shares	10.24
Canceled/Forfeited | $ / shares	16.80
Ending Balance | $ / shares	13.77
Vested or expected to vest at August 1, 2015 | $ / shares	13.77
Exercisable at August 1, 2015 | $ / shares	$ 14.44
Market Based Option Award
Options Outstanding
Beginning Balance | shares	2,232
Canceled/Forfeited | shares	(8)
Ending Balance | shares	2,224
Weighted Average Exercise Price
Beginning Balance | $ / shares	$ 15.43
Canceled/Forfeited | $ / shares	15.43
Ending Balance | $ / shares	$ 15.43

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - USD ($)	May 18, 2016	Apr. 01, 2016	Sep. 28, 2015	Apr. 01, 2015	Apr. 30, 2016	Dec. 31, 2015	Aug. 24, 2015	Aug. 01, 2015	Aug. 02, 2014	Jan. 30, 2016	Aug. 01, 2015	Aug. 02, 2014	Jul. 31, 2015
Stockholders Equity Note [Line Items]
Closing stock price													$ 12.44
Share repurchase program, shares repurchased								14,600,000			16,000,000
Share repurchase program, amount repurchased								$ 193,200,000			$ 215,300,000
Accrued share repurchases								$ 19,672,000			$ 19,672,000
Share repurchase program, cumulative shares repurchased								237,900,000			237,900,000
Share repurchase program, total amount of repurchases								$ 3,000,000,000			$ 3,000,000,000
Share repurchase program, remaining available for future share repurchases								$ 228,200,000			$ 228,200,000
Cash dividend declared per share								$ 0.06	$ 0.06		$ 0.12	$ 0.12
Employee Stock Purchase Plan, 2000 Restated Plan
Stockholders Equity Note [Line Items]
Unrecognized share based compensation cost								$ 44,200,000			$ 44,200,000
Employee stock purchase plan, shares issued								3,200,000	5,200,000		3,200,000	5,200,000
Employee stock purchase plan, weighted-average price								$ 11.88	$ 7.58		$ 11.88	$ 7.58
Subsequent Event
Stockholders Equity Note [Line Items]
Share repurchase program, shares repurchased							3,700,000			0
Share repurchase program, amount repurchased							$ 45,600,000
Share repurchase program, average price per share							$ 12.39
Cash dividend declared per share	$ 0.06		$ 0.06		$ 0.06	$ 0.06
Dividends declared, date to be paid	Jul. 12, 2016		Oct. 22, 2015
Dividends declared, date of record	Jun. 14, 2016		Oct. 8, 2015
Time Based Option Award
Stockholders Equity Note [Line Items]
Options vested and expected to vest, aggregate intrinsic value								$ 45,800,000			$ 45,800,000
Options vested and expected to vest, weighted average remaining contractual term (in years)											6 years
Options exercisable, aggregate intrinsic value								30,600,000			$ 30,600,000
Options exercisable, weighted average remaining contractual term (in years)											4 years 2 months 12 days
Aggregate intrinsic value of stock options exercised								2,500,000	$ 4,200,000		$ 8,800,000	$ 13,600,000
Unrecognized share based compensation cost								57,000,000			$ 57,000,000
Unrecognized share based compensation cost, weighted-average period of recognition											2 years 4 months 24 days
Market Based Option Award
Stockholders Equity Note [Line Items]
Options vested and expected to vest, aggregate intrinsic value								0			$ 0
Options vested and expected to vest, weighted average remaining contractual term (in years)											5 years 8 months 12 days
Performance Based Restricted Stock Unit
Stockholders Equity Note [Line Items]
Vested				360,723							658,000
Granted											669,000
Performance Based Restricted Stock Unit | Executive Officer
Stockholders Equity Note [Line Items]
Vested				478,001
Granted				107,954
Performance Based Restricted Stock Unit | Subsequent Event | Executive Officer
Stockholders Equity Note [Line Items]
Vested		33,616
Restricted Stock Units (RSUs)
Stockholders Equity Note [Line Items]
Unrecognized share based compensation cost								103,600,000			$ 103,600,000
Unrecognized share based compensation cost, weighted-average period of recognition											1 year 4 months 24 days
Vested											5,259,000
Granted											5,949,000
Restricted stock units, aggregate intrinsic value								$ 126,100,000			$ 126,100,000
Restricted stock units vested and expected to vest								10,100,000			10,100,000
Financial Performance Restricted Stock Units | Subsequent Event | Executive Officer
Stockholders Equity Note [Line Items]
Vested		0

Activity Related to Non Vested

Activity Related to Non Vested Portion of Restricted Stock Units (Detail) - $ / shares	Apr. 01, 2015	Aug. 01, 2015
Time Based Restricted Units
Restricted Stock Units Outstanding
Beginning Balance		9,748,000
Granted		4,873,000
Vested		(4,601,000)
Canceled/Forfeited		(409,000)
Ending Balance		9,611,000
Weighted Average Grant Date Fair Value
Beginning Balance		$ 14.84
Granted		13.66
Vested		15.30
Canceled/Forfeited		14.06
Ending Balance		$ 14.05
Performance Based Restricted Stock Unit
Restricted Stock Units Outstanding
Beginning Balance		1,254,000
Granted		669,000
Vested	(360,723)	(658,000)
Canceled/Forfeited		(227,000)
Ending Balance		1,038,000
Weighted Average Grant Date Fair Value
Beginning Balance		$ 14.99
Granted		14.08
Vested		15.15
Canceled/Forfeited		14.43
Ending Balance		$ 14.42
Market Based Restricted Stock Unit
Restricted Stock Units Outstanding
Granted		407,000
Canceled/Forfeited		(54,000)
Ending Balance		353,000
Weighted Average Grant Date Fair Value
Granted		$ 12.24
Canceled/Forfeited		12.24
Ending Balance		$ 12.24
Restricted Stock Units (RSUs)
Restricted Stock Units Outstanding
Beginning Balance		11,002,000
Granted		5,949,000
Vested		(5,259,000)
Canceled/Forfeited		(690,000)
Ending Balance		11,002,000
Weighted Average Grant Date Fair Value
Beginning Balance		$ 14.85
Granted		13.61
Vested		15.28
Canceled/Forfeited		13.09
Ending Balance		$ 14.03

Schedule of Cash Dividends (Det

Schedule of Cash Dividends (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Cash dividend
Cash dividend per share	$ 0.06	$ 0.06	$ 0.12	$ 0.12
Total payment to shareholders	$ 31,194	$ 30,820	$ 62,104	$ 60,992

Total Stock Compensation by Exp

Total Stock Compensation by Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 36,674	$ 35,020	$ 69,895	$ 64,989
Cost of goods sold
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	2,012	1,733	3,559	4,032
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	27,808	24,276	52,589	44,644
Selling and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	2,707	2,617	5,284	5,545
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$ 4,147	$ 6,394	$ 8,463	$ 10,768

Share Based Compensation - Addi

Share Based Compensation - Additional Information (Detail) - USD ($) $ in Millions	Aug. 01, 2015	Jan. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation capitalized in inventory	$ 2	$ 1.5

Weighted Average Assumptions Us

Weighted Average Assumptions Used to Calculate Fair Value of Time Based Equity Award (Detail) - Time Based Option Award - $ / shares	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value	$ 3.97	$ 3.98	$ 3.98	$ 4.37
Expected volatility	34.00%	34.00%	34.00%	35.00%
Expected term (in years)	5 years 4 months 24 days	5 years	5 years 4 months 24 days	5 years
Risk-free interest rate	1.60%	1.70%	1.60%	1.60%
Expected dividend yield	1.70%	1.60%	1.70%	1.60%

Weighted Average Assumptions 64

Weighted Average Assumptions Used to Calculate Fair Value Awards for Employee Stock Purchase Plan (Detail) - Employee Stock Purchase Plan - $ / shares	6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated fair value	$ 3.78	$ 4.13
Volatility	31.00%	32.00%
Expected term (in years)	1 year 3 months 18 days	1 year 3 months 18 days
Risk-free interest rate	0.40%	0.20%
Dividend yield	1.70%	1.60%

Weighted Average Assumptions 65

Weighted Average Assumptions Used to Calculate Fair Value Awards of Total Shareholder Return Awards (Detail) - Total Shareholder Return	6 Months Ended
	Aug. 01, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	2 years
Expected volatility	27.00%
Average correlation coefficient of peer companies	0.40%
Risk-free interest rate	0.50%
Expected dividend yield	1.70%

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - Chief Executive Officer - USD ($) $ in Millions	6 Months Ended
	Aug. 01, 2015	Feb. 28, 2015
Related Party Transaction [Line Items]
Amount of transactions with related parties	$ 8.4
Liability to related party	$ 7	$ 15.4

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) $ in Millions	Feb. 16, 2016USD ($)	Apr. 30, 2016USD ($)Director	Feb. 29, 2016USD ($)	Aug. 01, 2015USD ($)	Aug. 01, 2015USD ($)
Subsequent Event | Starboard Value LP
Subsequent Event [Line Items]
Number of independent directors | Director		4
Settlement Agreement and Patent License | Subsequent Event
Subsequent Event [Line Items]
Litigation settlement, amount	$ 750	$ 750
Litigation Settlement amount paid		$ 750
Carnegie Mellon Litigation | Mutual release of claims and covenant not to sue provisions | Operating Expense
Subsequent Event [Line Items]
Litigation settlement, amount				$ 654.7	$ 654.7
Carnegie Mellon Litigation | Future license settlement
Subsequent Event [Line Items]
License expiration period					Through April 2018.
Carnegie Mellon Litigation | License Fees | Cost of goods sold
Subsequent Event [Line Items]
Litigation settlement, amount				81.3
Carnegie Mellon Litigation | License Fees | Cost of Goods Sold for Past Use
Subsequent Event [Line Items]
Litigation settlement, amount				78.9	$ 78.9
Carnegie Mellon Litigation | License Fees | Remaining Cost of Goods Sold
Subsequent Event [Line Items]
Litigation settlement, amount				$ 2.4	$ 2.4
Carnegie Mellon Litigation | Subsequent Event | Mutual release of claims and covenant not to sue provisions
Subsequent Event [Line Items]
Litigation settlement, amount			$ 654.7
Carnegie Mellon Litigation | Subsequent Event | Licensing of intellectual property
Subsequent Event [Line Items]
Litigation settlement, amount			81.3
Carnegie Mellon Litigation | Subsequent Event | Future license settlement
Subsequent Event [Line Items]
Litigation settlement, amount			$ 14