Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 27, 2015	Mar. 28, 2014
Cash Flows from Operating Activities:
Net income	$ 94,852us-gaap_NetIncomeLoss	$ 116,514us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,453	14,628
Amortization of acquisition-related intangible assets	2,464us-gaap_AmortizationOfIntangibleAssets	2,465us-gaap_AmortizationOfIntangibleAssets
Amortization of debt discount and debt issuance costs	779	779
Stock-based compensation	20,325us-gaap_ShareBasedCompensation	23,347us-gaap_ShareBasedCompensation
Net gain on sale of available-for-sale securities	(2,506)	(48)
Amortization of investment discount/premium	2,129	685
Deferred income tax benefit	(651)us-gaap_DeferredIncomeTaxExpenseBenefit	(1,711)us-gaap_DeferredIncomeTaxExpenseBenefit
Tax effect of employee stock plans	0	(217)
Excess tax benefit from employee stock plans	(203)	(326)
Changes in assets and liabilities:
Accounts receivable, net	(55,726)	39,623
Inventories	(1,966)us-gaap_IncreaseDecreaseInInventories	5,743us-gaap_IncreaseDecreaseInInventories
Other assets	(9,098)	(5,185)
Accounts payable and other liabilities	(2,998)	(3,425)
Deferred income and allowances on sales to distributors	67,390	(73,227)
Income taxes payable and receivable, net	5,894	10,111
Deferred compensation plan obligations	1,495	674
Net cash provided by operating activities	136,633	130,430
Cash Flows from Investing Activities:
Purchases of property and equipment	(38,593)	(12,622)
Purchases of deferred compensation plan securities, net	(1,495)	(674)
Purchases of available-for-sale securities	(625,960)	(103,982)
Proceeds from sale of available-for-sale securities	387,985	35,562
Proceeds from maturity of available-for-sale securities	37,472	41,548
Purchases of intangible assets	(257)	0
Purchases of other investments	(2,000)	0
Net cash used in investing activities	(242,848)	(40,168)
Cash Flows from Financing Activities:
Proceeds from issuance of common stock through stock plans	1,408us-gaap_ProceedsFromStockPlans	6,082us-gaap_ProceedsFromStockPlans
Shares withheld for employee taxes	(2,994)	(3,048)
Payment of dividends to stockholders	(54,161)us-gaap_PaymentsOfDividendsCommonStock	(47,554)us-gaap_PaymentsOfDividendsCommonStock
Long-term debt and credit facility issuance costs	0us-gaap_PaymentsOfDebtIssuanceCosts	(1,321)us-gaap_PaymentsOfDebtIssuanceCosts
Repurchases of common stock	(57,507)	(161,794)
Excess tax benefit from employee stock plans	203	326
Net cash used in financing activities	(113,051)	(207,309)
Net decrease in cash and cash equivalents	(219,266)	(117,047)
Cash and cash equivalents at beginning of period	2,426,367	2,869,158
Cash and cash equivalents at end of period	$ 2,207,101	$ 2,752,111

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The cash outflow associated with other investments held by the entity for investment purposes not otherwise defined in the taxonomy.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

+ Details

Name:	us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow associated with maturities (principal being due), prepayments and calls (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow associated with the amount received from the stock plan during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration