The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 21
-Paragraph 16, 20
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13476-108611

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Balance Type:	credit
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- Definition

Interest rate stated in the contractual debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Aggregate carrying value of owned private equity or other securities for which a quoted market price is not readily determinable, the value of which has been determined by management based upon fair value methods, including pricing of similar securities and valuation techniques and is included in the schedule of financial condition or the balance sheet.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-BRD
-Chapter 7
-Paragraph 6-14
-IssueDate 2006-05-01
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Rule 15c3
-Number 240
-Section 3
-Paragraph i
-Article 15c3

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- Definition

Debt Conversion Converted Instruments Expiration Or Due Date Day Month And Year

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Namespace Prefix:	xlnx
Data Type:	invest:dateStringItemType
Balance Type:	na
Period Type:	duration

- Definition

Impairment loss on non-marketable equity investment.

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Namespace Prefix:	xlnx
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Balance Type:	debit
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- Definition

Redemption of student loan auction rate securities.

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- Definition

Student Loan Auction Rate Securities Maturity Date

+ Details

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Namespace Prefix:	xlnx
Data Type:	us-types:dateStringItemType
Balance Type:	na
Period Type:	duration

Fair Value Measurements (Narrative) (Details) (USD $)	3 Months Ended				1 Months Ended			3 Months Ended
Fair Value Measurements (Narrative) (Details) (USD $)	Jul. 02, 2011	Jul. 03, 2010	Jul. 02, 2011 Maximum [Member]	Jul. 02, 2011 Minimum [Member]	Mar. 31, 2007 3.125% Junior Subordinated Convertible Debentures [Member]	Jul. 02, 2011 3.125% Junior Subordinated Convertible Debentures [Member]	Apr. 02, 2011 3.125% Junior Subordinated Convertible Debentures [Member]	Jul. 02, 2011 Available-For-Sale Securities [Member]
Redemption Of Student Loan Auction Rate Securities	$ 4,400,000	$ 450,000						$ 31,200,000
Student loan auction rate securities maturity date			May 2046	December 2027
Principal amount of convertible debentures					1,000,000,000	689,635,000	689,635,000
Interest rate of debentures					3.125%	3.125%
Convertible debentures due date					March 15, 2037
Fair value of debentures						886,200,000
Non-marketable equity securities	11,700,000
Impairment loss on non-marketable equity investment		$ 0