Derivative Financial Instruments (Details Textuals) (USD $)	6 Months Ended
Oct. 01, 2011	Apr. 02, 2011
Derivative Financial Instruments (Textuals) [Abstract]
Outstanding forward currency exchange contracts expire	various dates between October 2011 and August 2013
Hedging Program number of years	2 years
Interest rate of debentures	3.125%
Fair value of the embedded derivative	$ 2,000,000	$ 945,000
Percentage of foreign currency forward contracts designated as cash flow hedges	97.00%
Percentage of foreign currency forward contracts designated as fair value hedges	3.00%
Net cash flow gain (loss) reclassified into earnings	$ 2,100,000

Interest rate stated in the contractual debt agreement.

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

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Net fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as assets, net of those classified as liabilities.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 44A, 44B

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 12-16, 44A, 44B

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

+ Details

Name:	us-gaap_EmbeddedDerivativeFairValueOfEmbeddedDerivativeNet
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 45

-Subparagraph b(2)

-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 815

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6887037&loc=d3e80748-113994

+ Details

Name:	us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Date when foreign currency exchange rate derivatives mature or expire.

+ Details

Name:	us-gaap_MaturityOfForeignCurrencyDerivatives
Namespace Prefix:	us-gaap
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	instant

- Definition

Derivative financial instruments.

+ Details

Name:	xlnx_DerivativeFinancialInstrumentsTextualsAbstract
Namespace Prefix:	xlnx
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Hedging Program Number Of Years

+ Details

Name:	xlnx_HedgingProgramNumberOfYears
Namespace Prefix:	xlnx
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of foreign currency forward contracts designated as cash flow hedges.

+ Details

Name:	xlnx_PercentageOfForeignCurrencyForwardContractsDesignatedAsCashFlowHedges
Namespace Prefix:	xlnx
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of foreign currency forward contracts designated as fair value hedges.

+ Details

Name:	xlnx_PercentageOfForeignCurrencyForwardContractsDesignatedAsFairValueHedges
Namespace Prefix:	xlnx
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant