-Network: (11 - Statement - Statement Of Financial Position Classified)

-Statement of Financial Position [Abstract] {ID1}

-Statement [Table] {ID2}

-Statement [Line Items] {ID3}

-Assets {ID4}

-Current assets: {ID5}

Cash and cash equivalents {ID6}

Accounts receivable, net of allowances for doubtful accounts of $3,205 and $3,096 as of June 26, 2009 and December 31, 2008, respectively {ID7}

Inventories {ID8}

Deferred income taxes - current {ID9}

Deferred compensation plan - marketable securities {ID10}

Deferred compensation plan - restricted cash equivalents {ID11}

Other current assets {ID12}

Total current assets {ID13}

Property and equipment, net {ID14}

Deferred income taxes - non-current {ID15}

Other assets, net {ID16}

Total assets {ID17}

-Liabilities and stockholders' equity {ID18}

-Current liabilities: {ID19}

Accounts payable {ID20}

Accrued liabilities {ID21}

Accrued compensation and related liabilities {ID22}

Deferred compensation plan obligations {ID23}

Deferred income and allowances on sales to distributors {ID24}

Income taxes payable {ID25}

Total current liabilities {ID26}

Income taxes payable - non-current {ID27}

Long-term credit facility {ID28}

Other non-current liabilities {ID29}

Total liabilities {ID30}

Commitments and contingencies (See Note 10-Commitments and Contingencies) {ID31}

-Stockholders' equity: {ID32}

Common stock: $.001 par value; 1,000,000 shares authorized; outstanding - 294,183 at June 26, 2009 and 292,733 shares at December 31, 2008 {ID33}

Capital in excess of par value {ID34}

Retained earnings {ID35}

Accumulated other comprehensive loss {ID36}

Total stockholders' equity {ID37}

Total liabilities and stockholders' equity {ID38}

-Network: (12 - Statement - Statement Of Financial Position Classified (Parenthetical))

-Statement of Financial Position [Abstract] {ID39}

-Statement [Table] {ID40}

-Statement [Line Items] {ID41}

Accounts receivable, allowances for doubtful accounts {ID42}

Common stock, par value {ID43}

Common stock, shares authorized {ID44}

Common stock, outstanding {ID45}

-Network: (13 - Statement - Statement Of Income)

-Income Statement [Abstract] {ID46}

-Statement [Table] {ID47}

-Statement [Line Items] {ID48}

Net sales {ID49}

Cost of sales {ID50}

Gross margin {ID51}

Research and development expense {ID52}

Selling, general, and administrative expense {ID53}

Compensation expense (benefit) - deferred compensation plan {ID54}

Loss (gain) on deferred compensation plan securities {ID55}

Interest income and other {ID56}

Interest expense {ID57}

Income before income taxes {ID58}

Income tax expense {ID59}

Net income {ID60}

-Net income per share: {ID61}

Basic {ID62}

Diluted {ID63}

-Shares used in computing per share amounts: {ID64}

Basic {ID65}

Diluted {ID66}

Cash dividends per common share {ID67}

-Network: (14 - Statement - Statement Of Cash Flows Indirect)

-Statement of Cash Flows [Abstract] {ID68}

-Statement [Table] {ID69}

-Statement [Line Items] {ID70}

-Cash Flows from Operating Activities: {ID71}

Net income {ID72}

-Adjustments to reconcile net income to net cash provided by operating activities: {ID73}

Depreciation and amortization {ID74}

Stock-based compensation {ID75}

Deferred income tax {ID76}

Tax effect of employee stock plans {ID77}

Excess tax benefit from employee stock plans {ID78}

Gain on sale of land {ID79}

Gain on substantive termination of retiree medical plan {ID80}

-Changes in assets and liabilities: {ID81}

Accounts receivable, net {ID82}

Inventories {ID83}

Other assets {ID84}

Accounts payable and other liabilities {ID85}

Deferred income and allowances on sales to distributors {ID86}

Income taxes payable {ID87}

Deferred compensation plan obligations {ID88}

Net cash provided by operating activities {ID89}

-Cash Flows from Investing Activities: {ID90}

Purchases of property and equipment {ID91}

Proceeds from the maturities and sales of available-for-sale investments {ID92}

Proceeds from sale of land {ID93}

Sales (purchases) of deferred compensation plan securities, net {ID94}

Purchases of intangible assets {ID95}

Net cash provided by (used for) investing activities {ID96}

-Cash Flows from Financing Activities: {ID97}

Proceeds from issuance of common stock through various stock plans {ID98}

Shares withheld for employee taxes {ID99}

Repurchases of common stock {ID100}

Payment of dividends to stockholders {ID101}

Excess tax benefit from stock-based compensation {ID102}

Decrease in book overdrafts {ID103}

Proceeds from long-term credit facility {ID104}

Principal payments on capital lease obligations {ID105}

Net cash used for financing activities {ID106}

Net increase in cash and cash equivalents {ID107}

Cash and cash equivalents at beginning of period {ID108}

Cash and cash equivalents at end of period {ID109}

-Non-cash Investing and Financing Activities: {ID110}

Assets acquired under capital leases {ID111}

-Network: (15 - Disclosure - Notes to Financial Statements)

-Notes to Financial Statements [Abstract] {ID112}

Note 1. Organization and Basis of Presentation {ID113}

Note 2. Recent Accounting Pronouncements {ID114}

Note 3. Significant Customers {ID115}

Note 4. Inventories {ID116}

Note 5. Property and Equipment {ID117}

Note 6. Deferred Income and Allowances on Sales to Distributors {ID118}

Note 7. Comprehensive Income {ID119}

Note 8. Income Per Share {ID120}

Note 9. Long-term Credit Facility {ID121}

Note 10. Commitments and Contingencies {ID122}

Note 11. Stock-Based Compensation {ID123}

Note 12. Income Taxes {ID124}

Note 13. Employee Benefit Plans {ID125}

Note 14. Restructuring Charges {ID126}

Note 15. Fair Value Measurements {ID127}

Note 16. Subsequent Event {ID128}

-Network: (16 - Disclosure - Document Information)

-Document Information [Text Block] {ID129}

Document Type {ID130}

Amendment Flag {ID131}

Amendment Description {ID132}

Document Period End Date {ID133}

-Network: (17 - Disclosure - Entity Information)

-Entity [Text Block] {ID134}

Trading Symbol {ID135}

Entity Registrant Name {ID136}

Entity Central Index Key {ID137}

Current Fiscal Year End Date {ID138}

Entity Well-known Seasoned Issuer {ID139}

Entity Current Reporting Status {ID140}

Entity Voluntary Filers {ID141}

Entity Filer Category {ID142}

Entity Common Stock, Shares Outstanding {ID143}

Entity Public Float {ID144}

ALTERA CORP XBRL Taxonomy Presentation Networks